Navodaya Vidyalaya class 9 JNV Selection Mock Test -

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JNV Selection Mock Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

कौन सा शब्द भाववाचक संज्ञा नहीं है?

A
भलाई

B
पढ़ाई

C
सुंदर

D
अपनापन

Solution

'सुंदर' शब्द भाववाचक संज्ञा नही है।
Question 2
1 / -0

'कलेजा ठण्डा होना' मुहावरे का क्या अर्थ है?

A
शांत होना

B
प्रसन्न होना

C
होंसला होना

D
चापलूस होना

Solution

'कलेजा ठण्डा होना' मुहावरे का अर्थ 'शांत होना' है।
Question 3
1 / -0

अगर मगर करना का अर्थ है-

A
किसी को अपशब्द कहना

B
झूठ बोलना

C
बहाने बनाना

D
सच्ची बात कहना

Solution

अगर मगर करना का अर्थ 'बहाने बनाना' है।
Question 4
1 / -0

जिसका पति जीवित हो वह क्या कहलाती है?

A
सधवा

B
किशोरी

C
भवानी

D
गृहणी

Solution

जिसका पति जीवित हो वह सधवा कहलाती है।
Question 5
1 / -0

Directions For Questions

बादल सूक्ष्म पानी की बूंदों और बर्फ के महीन क्रिस्टलों का संग्रह है जो हवा में तैरता है। ये लाखों कणों से बने होते हैं ये लाखों छोटे कण वे जल की बूंदे हैं जो महासागरों, झीलों, नदियों आदि के पानी के भाप बनने से बनी हैं।
बादल आने वाले मौसम के बारे में सबसे सटीक भविष्यवाणी करने में सहायता करते हैं। तूफानों के पहले कुछ विशेष प्रकार के तूफ़ान दिखाई देते हैं जिसकी सहायता से आसानी से तूफ़ान का अनुमान लगाया जा सकता है।
तूफान के बादल अक्सर भूरे रंग के होते हैं क्योंकि वे इतने घने होते हैं कि ज्यादातर सूर्य का प्रकाश उनके पार नहीं जा पाता है। बादल पृथ्वी के तापमान को नियंत्रित रखने में सहायता करते हैं। बादल विभिन्न रंगों में पाए जाते हैं जैसे लाल, भूरे, सफ़ेद आदि। बादलों के रंग कई बार सूर्य की रौशनी से भी प्रभावित होते हैं, पर सूर्या की सीधी रौशनी पड़ती है तो सफ़ेद बादल होते हैं वहीँ सुबह और शाम के वक़्त लाल बादल अधिक दिखाई देते हैं। ये वर्षा कराने में सहायक होते हैं। यह पानी को एक स्थान से दूसरे स्थान ले जाते हैं और वर्षा करते हैं। बादल का एक और रूप है और वह है कोहरा। सर्दियों में कोहरा देखने को मिलता है। यह भी पानी और हिमकणों की छोटी-छोटी बूंदों से मिलकर बना होता है। कोहरे से सर्दियों में दृश्यता कम हो जाती है। भाषा के विकास में भी बादलों का अपना महत्त्व है। इनको लेकर बहुत सी कहावतें बनाई गई हैं जैसे "जो गरजते वो बरसते नहीं",बिन बादल बरसात" आदि। बादल आकार में बहुत विशाल होते हैं। छोटे से छोटा दिखने वाला बादल कई पहाड़ों से विशाल और 500 टन वजनी हो सकता है। भारत देश में, बरसात का मौसम जून में शुरू होता है और अगस्त में समाप्त होता है।

...view full instructions

बादल किसके तापमान को नियंत्रित रखने में सहायता करते हैं?

A
पृथ्वी

B
चंद्रमा

C
सूर्य

D
उपरोक्त सभी

Solution

बादल पृथ्वी के तापमान को नियंत्रित रखने में सहायता करते हैं।
Question 6
1 / -0

Directions For Questions

बादल सूक्ष्म पानी की बूंदों और बर्फ के महीन क्रिस्टलों का संग्रह है जो हवा में तैरता है। ये लाखों कणों से बने होते हैं ये लाखों छोटे कण वे जल की बूंदे हैं जो महासागरों, झीलों, नदियों आदि के पानी के भाप बनने से बनी हैं।
बादल आने वाले मौसम के बारे में सबसे सटीक भविष्यवाणी करने में सहायता करते हैं। तूफानों के पहले कुछ विशेष प्रकार के तूफ़ान दिखाई देते हैं जिसकी सहायता से आसानी से तूफ़ान का अनुमान लगाया जा सकता है।
तूफान के बादल अक्सर भूरे रंग के होते हैं क्योंकि वे इतने घने होते हैं कि ज्यादातर सूर्य का प्रकाश उनके पार नहीं जा पाता है। बादल पृथ्वी के तापमान को नियंत्रित रखने में सहायता करते हैं। बादल विभिन्न रंगों में पाए जाते हैं जैसे लाल, भूरे, सफ़ेद आदि। बादलों के रंग कई बार सूर्य की रौशनी से भी प्रभावित होते हैं, पर सूर्या की सीधी रौशनी पड़ती है तो सफ़ेद बादल होते हैं वहीँ सुबह और शाम के वक़्त लाल बादल अधिक दिखाई देते हैं। ये वर्षा कराने में सहायक होते हैं। यह पानी को एक स्थान से दूसरे स्थान ले जाते हैं और वर्षा करते हैं। बादल का एक और रूप है और वह है कोहरा। सर्दियों में कोहरा देखने को मिलता है। यह भी पानी और हिमकणों की छोटी-छोटी बूंदों से मिलकर बना होता है। कोहरे से सर्दियों में दृश्यता कम हो जाती है। भाषा के विकास में भी बादलों का अपना महत्त्व है। इनको लेकर बहुत सी कहावतें बनाई गई हैं जैसे "जो गरजते वो बरसते नहीं",बिन बादल बरसात" आदि। बादल आकार में बहुत विशाल होते हैं। छोटे से छोटा दिखने वाला बादल कई पहाड़ों से विशाल और 500 टन वजनी हो सकता है। भारत देश में, बरसात का मौसम जून में शुरू होता है और अगस्त में समाप्त होता है।

...view full instructions

बादल का दूसरा रूप क्या है?

A
कुहरा

B
धूप

C
हवा

D
जल

Solution

बादल का दूसरा रूप कुहरा है।
Question 7
1 / -0

Directions For Questions

बादल सूक्ष्म पानी की बूंदों और बर्फ के महीन क्रिस्टलों का संग्रह है जो हवा में तैरता है। ये लाखों कणों से बने होते हैं ये लाखों छोटे कण वे जल की बूंदे हैं जो महासागरों, झीलों, नदियों आदि के पानी के भाप बनने से बनी हैं।
बादल आने वाले मौसम के बारे में सबसे सटीक भविष्यवाणी करने में सहायता करते हैं। तूफानों के पहले कुछ विशेष प्रकार के तूफ़ान दिखाई देते हैं जिसकी सहायता से आसानी से तूफ़ान का अनुमान लगाया जा सकता है।
तूफान के बादल अक्सर भूरे रंग के होते हैं क्योंकि वे इतने घने होते हैं कि ज्यादातर सूर्य का प्रकाश उनके पार नहीं जा पाता है। बादल पृथ्वी के तापमान को नियंत्रित रखने में सहायता करते हैं। बादल विभिन्न रंगों में पाए जाते हैं जैसे लाल, भूरे, सफ़ेद आदि। बादलों के रंग कई बार सूर्य की रौशनी से भी प्रभावित होते हैं, पर सूर्या की सीधी रौशनी पड़ती है तो सफ़ेद बादल होते हैं वहीँ सुबह और शाम के वक़्त लाल बादल अधिक दिखाई देते हैं। ये वर्षा कराने में सहायक होते हैं। यह पानी को एक स्थान से दूसरे स्थान ले जाते हैं और वर्षा करते हैं। बादल का एक और रूप है और वह है कोहरा। सर्दियों में कोहरा देखने को मिलता है। यह भी पानी और हिमकणों की छोटी-छोटी बूंदों से मिलकर बना होता है। कोहरे से सर्दियों में दृश्यता कम हो जाती है। भाषा के विकास में भी बादलों का अपना महत्त्व है। इनको लेकर बहुत सी कहावतें बनाई गई हैं जैसे "जो गरजते वो बरसते नहीं",बिन बादल बरसात" आदि। बादल आकार में बहुत विशाल होते हैं। छोटे से छोटा दिखने वाला बादल कई पहाड़ों से विशाल और 500 टन वजनी हो सकता है। भारत देश में, बरसात का मौसम जून में शुरू होता है और अगस्त में समाप्त होता है।

...view full instructions

जब सूर्य की सीधी रोशनी बादलों पर पड़ती है तो वे किस रंग में दिखाई देते हैं?

A
लाल

B
सफ़ेद

C
भूरा

D
काला

Solution

जब सूर्य की सीधी रोशनी बादलों पर पड़ती है तो वे सफ़ेद रंग में दिखाई देते हैं।
Question 8
1 / -0

Directions For Questions

बादल सूक्ष्म पानी की बूंदों और बर्फ के महीन क्रिस्टलों का संग्रह है जो हवा में तैरता है। ये लाखों कणों से बने होते हैं ये लाखों छोटे कण वे जल की बूंदे हैं जो महासागरों, झीलों, नदियों आदि के पानी के भाप बनने से बनी हैं।
बादल आने वाले मौसम के बारे में सबसे सटीक भविष्यवाणी करने में सहायता करते हैं। तूफानों के पहले कुछ विशेष प्रकार के तूफ़ान दिखाई देते हैं जिसकी सहायता से आसानी से तूफ़ान का अनुमान लगाया जा सकता है।
तूफान के बादल अक्सर भूरे रंग के होते हैं क्योंकि वे इतने घने होते हैं कि ज्यादातर सूर्य का प्रकाश उनके पार नहीं जा पाता है। बादल पृथ्वी के तापमान को नियंत्रित रखने में सहायता करते हैं। बादल विभिन्न रंगों में पाए जाते हैं जैसे लाल, भूरे, सफ़ेद आदि। बादलों के रंग कई बार सूर्य की रौशनी से भी प्रभावित होते हैं, पर सूर्या की सीधी रौशनी पड़ती है तो सफ़ेद बादल होते हैं वहीँ सुबह और शाम के वक़्त लाल बादल अधिक दिखाई देते हैं। ये वर्षा कराने में सहायक होते हैं। यह पानी को एक स्थान से दूसरे स्थान ले जाते हैं और वर्षा करते हैं। बादल का एक और रूप है और वह है कोहरा। सर्दियों में कोहरा देखने को मिलता है। यह भी पानी और हिमकणों की छोटी-छोटी बूंदों से मिलकर बना होता है। कोहरे से सर्दियों में दृश्यता कम हो जाती है। भाषा के विकास में भी बादलों का अपना महत्त्व है। इनको लेकर बहुत सी कहावतें बनाई गई हैं जैसे "जो गरजते वो बरसते नहीं",बिन बादल बरसात" आदि। बादल आकार में बहुत विशाल होते हैं। छोटे से छोटा दिखने वाला बादल कई पहाड़ों से विशाल और 500 टन वजनी हो सकता है। भारत देश में, बरसात का मौसम जून में शुरू होता है और अगस्त में समाप्त होता है।

...view full instructions

भारत देश में, बरसात का मौसम कब होता है?

A
जून से अगस्त तक

B
दिसम्बर से फरवरी तक

C
नवम्बर से जनवरी तक

D
जनवरी से मार्च तक

Solution

भारत देश में, बरसात का मौसम जून में शुरू होता है और अगस्त में समाप्त होता है।
Question 9
1 / -0

Directions For Questions

बादल सूक्ष्म पानी की बूंदों और बर्फ के महीन क्रिस्टलों का संग्रह है जो हवा में तैरता है। ये लाखों कणों से बने होते हैं ये लाखों छोटे कण वे जल की बूंदे हैं जो महासागरों, झीलों, नदियों आदि के पानी के भाप बनने से बनी हैं।
बादल आने वाले मौसम के बारे में सबसे सटीक भविष्यवाणी करने में सहायता करते हैं। तूफानों के पहले कुछ विशेष प्रकार के तूफ़ान दिखाई देते हैं जिसकी सहायता से आसानी से तूफ़ान का अनुमान लगाया जा सकता है।
तूफान के बादल अक्सर भूरे रंग के होते हैं क्योंकि वे इतने घने होते हैं कि ज्यादातर सूर्य का प्रकाश उनके पार नहीं जा पाता है। बादल पृथ्वी के तापमान को नियंत्रित रखने में सहायता करते हैं। बादल विभिन्न रंगों में पाए जाते हैं जैसे लाल, भूरे, सफ़ेद आदि। बादलों के रंग कई बार सूर्य की रौशनी से भी प्रभावित होते हैं, पर सूर्या की सीधी रौशनी पड़ती है तो सफ़ेद बादल होते हैं वहीँ सुबह और शाम के वक़्त लाल बादल अधिक दिखाई देते हैं। ये वर्षा कराने में सहायक होते हैं। यह पानी को एक स्थान से दूसरे स्थान ले जाते हैं और वर्षा करते हैं। बादल का एक और रूप है और वह है कोहरा। सर्दियों में कोहरा देखने को मिलता है। यह भी पानी और हिमकणों की छोटी-छोटी बूंदों से मिलकर बना होता है। कोहरे से सर्दियों में दृश्यता कम हो जाती है। भाषा के विकास में भी बादलों का अपना महत्त्व है। इनको लेकर बहुत सी कहावतें बनाई गई हैं जैसे "जो गरजते वो बरसते नहीं",बिन बादल बरसात" आदि। बादल आकार में बहुत विशाल होते हैं। छोटे से छोटा दिखने वाला बादल कई पहाड़ों से विशाल और 500 टन वजनी हो सकता है। भारत देश में, बरसात का मौसम जून में शुरू होता है और अगस्त में समाप्त होता है।

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बादल को लेकर कौन सी कहावत बनाई गई है?

A
जो गरजतें हैं वो बरसते नहीं

B
अधजल गगरी छलकत जाय

C
दूध का दूध पानी का पानी

D
डूबते को तिनके का सहारा

Solution

बादल को लेकर 'जो गरजतें हैं वो बरसते नहीं' कहावत बनाई गई है।
Question 10
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'आकर्षण' का विलोम शब्द है-

A
विकर्षण

B
प्रलोभन

C
कलित

D
घृणा

Solution

'आकर्षण' का विलोम शब्द 'विकर्षण' है।
Question 11
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'इन्द्र' का पर्यायवाची है-

A
पुरंदर

B
ईश्वर

C
अर्जुन

D
दानव

Solution

'इन्द्र' का पर्यायवाची 'पुरंदर' है।
Question 12
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निम्नलिखित रेखांकित मुहावरे का सबसे उपयुक्त अर्थ क्या है?
कुछ अतिथि तो बिन बुलाए ही दूसरों के घर आसन जमा लेते हैं।

A
कब्जा करना

B
दखल देना

C
दुखी करना

D
सिर पर बैठना

Solution

रेखांकित मुहावरे का सबसे उपयुक्त अर्थ 'कब्जा करना' है।
Question 13
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निम्नलिखित वाक्य में रेखांकित शब्द के विलोम शब्द के सही विकल्प को चुनकर लिखिए।

सनाथ बालकों को अनाथ बालकों की मदद करनी चाहिए ।

A
अग्रज

B
अनाश्रित

C
अनुज

D
नाथ

Solution

रेखांकित शब्द के विलोम शब्द का सही उत्तर अनाश्रित है।
Question 14
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निम्न शब्दों में कौन सा शब्द विशेषण है -

A
सच्चा

B
शीतलता

C
क्रोध

D
खुशी

Solution

सच्चा शब्द विशेषण है।
Question 15
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निम्नलिखित वाक्य में प्रयुक्त रेखांकित शब्द का विलोम शब्द ज्ञातकर सही विकल्प का चयन करे-

अमृत का शाब्दिक अर्थ 'अमरता' है।

A
नश्वरता

B
विश

C
जीवन

D
पंचामृत

Solution

नश्वरता सही उत्तर है।
Question 16
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Directions: Fill in the blank with the most appropriate option.

_________ words that he spoke were very thoughtful.

A
Few

B
A few

C
The few

D
Little

Solution

Here, the sentence implies that whatever little he spoke was all meaningful. 'The few' means not many, but all of them. Thus, 'the few' is the correct usage.
Question 17
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Directions: Select the suitable tag question to match the given statement.

Let us unlock this box, __________

A
aren't we?

B
shall we?

C
won't we?

D
can we?

Solution

(1), (3) and (4) are incorrect because the given sentence begins with the words 'let us'; with 'let us', the tag question is 'shall we?'.
Question 18
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Directions: Fill in the blank with the suitable form of verb from the given options.

He ________ the new job soon.

A
is joining

B
will join

C
has joined

D
joins

Solution

The tense of the sentence is simple future. It refers to an action that will take place in future. So, here 'will' with first form of the verb will be used. Hence 'will join' is the correct option.
Question 19
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Directions: Fill in the blank with the suitable form of verb from the given options.

She usually ________ a spotless white uniform to her work.

A
wears

B
is wearing

C
wear

D
has been wearing

Solution

The tense of the sentence is simple present as it refers to a habitual fact. The subject of the sentence is third person singular. So, here the first form of verb with 's' is to be used. Hence 'wears' is the correct option.
Question 20
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Directions: Choose the word which is not an antonym of 'frequent.'

A
Unceasing

B
Inconstant

C
Irregular

D
Uncommon

Solution

'Frequent' means 'common or repeated'. Except option 1, the rest are opposites as they mean rare or infrequent. Option 1 is not an antonym as it means 'continuing forever or indefinitely.'
Question 21
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Directions For Questions

Directions: Read the following passage carefully and choose the most appropriate answer to the given question out of the four alternatives.

The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world; 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010.
The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.

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Choose the most appropriate response.

A
The name of the tower is not connected with anyone.

B
The name of the tower is connected with a real person.

C
The name of the tower is connected with a certain company.

D
The name of the tower is connected with another tower in Paris.

Solution

The sentence, from the passage, 'It was named after the engineer Gustave Eiffel, whose company designed and built the tower' justifies that option (2) is the correct answer.
Question 22
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Directions For Questions

Directions: Read the following passage carefully and choose the most appropriate answer to the given question out of the four alternatives.

The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world; 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010.
The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.

...view full instructions

What is the Eiffel Tower made of?

A
It is made of wood.

B
It is made of stone.

C
It is made of iron.

D
It is made of silver.

Solution

As given in the passage, the sentence 'The Eiffel Tower is an iron lattice tower' justifies that option (3) is the correct answer.
Question 23
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Directions For Questions

Directions: Read the following passage carefully and choose the most appropriate answer to the given question out of the four alternatives.

The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world; 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010.
The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.

...view full instructions

Select the most appropriate answer from the passage.

A
The Eiffel Tower continues to be criticised by French intellectuals and artists.

B
The Eiffel Tower has never been criticised by French intellectuals and artists.

C
The Eiffel Tower will never be criticised by French intellectuals and artists.

D
The Eiffel Tower was criticised in the beginning by French intellectuals and artists.

Solution

The sentence '... it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world' justifies that option (4) is the correct answer.
Question 24
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Directions For Questions

Directions: Read the following passage carefully and choose the most appropriate answer to the given question out of the four alternatives.

The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world; 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010.
The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.

...view full instructions

Why is 2010 considered a significant year?

A
A year marked by a decline in tourism

B
A year marked by unfortunate accidents

C
A year marked by a landmark achievement in French tourism

D
A year marked by stagnation

Solution

The sentence 'The tower received its 250 millionth visitor in 2010' authenticates that option (3) is the correct answer.
Question 25
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Directions For Questions

Directions: Read the following passage carefully and choose the most appropriate answer to the given question out of the four alternatives.

The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world; 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010.
The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.

...view full instructions

Which statement truly reflects the status of the Eiffel Tower?

A
The Eiffel Tower features prominently in popular culture.

B
The Eiffel Tower is simply a regional icon.

C
The Eiffel Tower has no international or aesthetic appeal.

D
The Eiffel Tower has never captured public imagination.

Solution

The sentence 'As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows' authenticates its global status. Thus, option (1) is the correct answer.
Question 26
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Directions For Questions

Directions: Read the following passage carefully and choose the most appropriate answer to the given question out of the four alternatives.

The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world; 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010.
The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.

...view full instructions

The Eiffel Tower is as high as

A
a three level building

B
any other iron lattice tower

C
a 81 storey building

D
the Washington Monument

Solution

It is stated in the passage, 'The tower is 324 metres, about the same height as an 81-storey building.' So, option 3 is the correct answer.
Question 27
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Directions For Questions

Directions: Read the following passage carefully and choose the most appropriate answer to the given question out of the four alternatives.

The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world; 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010.
The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.

...view full instructions

The Eiffel Tower is featured in different forms of media as it is

A
located on the Champ de Mars

B
the tallest structure in Paris

C
the most visited monument

D
a global landmark

Solution

The answer can be found in the line, 'As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows.' Hence, option 4 is the correct answer.
Question 28
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Directions: Choose the correct option which changes the underlined clause into a phrase.

My mother has to handle tasks which are complicated.

A
tasks which complicate

B
tasked to complicate

C
complicated tasks

D
complicating tasks

Solution

A phrase does not contain a subject and verb and, consequently, cannot convey a complete thought. So, from the clause we remove the subject or the relative pronoun 'which' and the verb to make it a phrase. 'Complicated' modifies the tasks. So, it is used as an adjective. Hence, option 3 is correct. Other options make the sentence ungrammatical.
Question 29
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Directions: Choose the option that correctly changes the voice of the given sentence.

The woman was washing clothes.

Clothes _____ by the woman.

A
were washed

B
having been washed

C
were being washed

D
had been washed

Solution

The sentence is in past continuous tense. So, the passive form will have the structure 'was/were + being + past participle form of verb'. 'Clothes' is plural. So, 'were' will be used. Thus, option 3 is the correct answer.
Question 30
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Directions: In the following sentence, parts of the sentence have been jumbled up. You are required to rearrange these parts which are labelled P, Q, R and S to produce the correct sentence. Choose the proper sequence.

(P) the conspiracy /(Q) got wind of /(R) the Government /(S) against the king's life

The correct sequence should be:

A
PQRS

B
RQPS

C
PSQR

D
SPQR

Solution

Correct Answer: RQPS
The Government got wind of the conspiracy against the king's life.
Question 31
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When 18 is added to a two-digit number, digits of the number are reversed. Find the difference between the digits of the number.

A
2

B
3

C
5

D
6

Solution

Let the number be xy.
The number = 10x + y
On interchanging the digits of the number = 10y + x
10x + y + 18 = 10y + x
9y - 9x = 18
y - x = 2
Question 32
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Find the smallest number by which 192 must be divided to obtain a perfect cube.

A
3

B
4

C
6

D
8

Solution

Now, 192 = 2 × 2 × 2 × 2 × 2 × 2 × 3

When we group the prime factors of 192 into triples, 3 is left out.
∴ 192 is not a perfect cube.
Now, 192/3 = 2 × 2 × 2 × 2 × 2 × 2
Or, 64 = 2 × 2 × 2 × 2 × 2 × 2
64 is a perfect cube.
Thus, the required number is 3.
Question 33
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Find the value of x in the given equation.

A
12,250

B
35,536

C
45,520

D
65,536

Solution

Squaring both sides, we get

Now, again squaring both sides, we get

x = 65,536
Question 34
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If 5^x = , then the value of x is

A
-

B
- 4

C

D
4

Solution

5^x =
5^x = = 5^-4
5^x = 5^-4
x = -4
Question 35
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An amount of Rs. 11,700 is shared among A, B and C in the ratio 10 : 3 : 13. C gives 20% of his share to B. What is the difference between the shares of A and B finally?

A
Rs. 2040

B
Rs. 1980

C
Rs. 5850

D
Rs. 1350

Solution

Rs. 11,700 is distributed among A, B and C in the ratio 10 : 3 : 13.

Share of A = Rs. 11,700 = 450 10 = Rs. 4500

Share of B = Rs. 11,700 = 450 3 = Rs. 1350

Share of C = Rs. 11,700 = 450 13 = Rs. 5850

C gives 20% of his share to B.
⇒ Amount given by C to B = Rs. 5850 = Rs. 1170

B's share finally = Rs. 1350 + Rs. 1170 = Rs. 2520
Difference between the shares of A and B finally = 4500 - 2520 = Rs. 1980
Question 36
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The value of a machine depreciates at 10.5% per annum. It was purchased 2 years ago. If its present value is Rs. 1,60,205, find the original value of the machine.

A
Rs. 2,40,000

B
Rs. 2,25,000

C
Rs. 2,00,000

D
Rs. 1,80,000

Solution

P = P₀
Rs. 1,60,205 = P₀
Rs. 1,60,205 = P₀

P₀ = Rs. ()
Question 37
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Calculate the amount earned on Rs. 960 at a simple interest rate of 1.2% p.a. for 1.2 years.

A
Rs. 1399.824

B
Rs. 973.824

C
Rs. 983.424

D
Rs. 1234.833

Solution

S.I = 13.824
Amount = P + S.I
Amount = 960 + 13.824 = Rs. 973.824
Question 38
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By selling a table for Rs. 2200, a trader gains 10%. Find the C.P. of the table.

A
Rs. 2100

B
Rs. 2000

C
Rs. 2300

D
Rs. 2400

Solution

S.P. of table = Rs. 2200
Gain% = 10
C.P. = ?
A.T.Q,
C.P
C.P = Rs. 2000
Question 39
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If 4p + 5q = 24 and pq = 8, find the value of 16p² + 25q².

A
244

B
256

C
376

D
477

Solution

We have 4p + 5q = 24 and pq = 8
Squaring both sides,
(4p + 5q)² = (24)²
(4p)² + (5q)² + 2 (4p) (5q) = (24)²
16p² + 25q² + 40pq = 576
16p² + 25q² + 40 × 8 = 576
16p² + 25q² = 576 – 320
16p² + 25q² = 256
Question 40
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A number is 147 more than the average of its quarter, one-fifth and one-tenth. Find the number.

A
160

B
180

C
172

D
162

Solution

Let the number be x.
Quarter of x =
One-fifth of x =
One-tenth of x =
Average of the numbers =
=
=
According to the question,
x = 147 +
Or = 147
x = 180
Question 41
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Find the length of the side of a rhombus, if the lengths of its diagonals are 16 cm and 12 cm.

A
10 cm

B
8 cm

C
20 cm

D
12 cm

Solution

ABCD is a rhombus.

AC = 16 cm
AO = OC = 8 cm
and BD = 12 cm
BO = OD = 6 cm
Using Pythagoras Theorem, we get
AO² + OB² = AB²
64 + 36 = AB²
AB = 10 cm
Question 42
1 / -0

If (x - y)²= 36 and xy = 2, then find the value of x² + y².

A
34

B
32

C
38

D
40

Solution

x² + y² - 2xy = 36
x² + y² = 36 + 2(xy)
= 36 + 4 = 40
Question 43
1 / -0

If , then find the value of .

A
21

B
20

C
18

D
15

Solution

Squaring both sides, we get:

= 25 - 4

= 21
Question 44
1 / -0

The students at ABC School are performing an experiment in the Mathematics Laboratory. They take a rectangular wooden board. The breadth and length of the board are in the ratio of 4 : 5. On the instruction of their teacher, they fit uniform pieces of wood all around the rectangular wooden board in a way that both the breadth and the length are increased by 8 cm and the new ratio becomes 5 : 6. What are the dimensions of the actual rectangular board?

A
l = 60 cm, b = 48 cm

B
l = 40 cm, b = 32 cm

C
l = 48 cm, b = 60 cm

D
l = 10 cm, b = 8 cm

Solution

Let the breadth of the board be 4x.
So, the length of the board = 5x

Cross-multiplication gives
6(4x + 8) = 5(5x + 8)
24x + 48 = 25x + 40
24x + 8 = 25x
x = 8
Breadth = 4x = 4 x 8 = 32 cm
Length = 5x = 5 x 8 = 40 cm
Question 45
1 / -0

If = 18, then x² + =

A
20

B
14

C
12

D
None of these

Solution

= 18
x² + + 2 = 18
Hence,
x² + = 18 - 2 = 16
Question 46
1 / -0

If 16(1‒ x) = 16x, then (4x)² is equal to

A
2

B
4

C
8

D
None of these

Solution

16(1 ‒ x) = 16x
i.e. 16 - 16x = 16x
i.e. x = 1/2
So, (4x)² = (4 x 1/2)² = 4
Question 47
1 / -0

In the following figure, ABO = 43° and OA and OB are the radii of the cirlce. Find the measure of angle ADB.

A
143°

B
94°

C
133°

D
166°

Solution

Given, ABO = 43°
As OA = OB, then OAB = OBA = 43°.
In triangle OAB,
OAB + OBA + AOB = 180°
43° + 43° + ∠AOB = 180°
86° + AOB = 180°
AOB = 94°
And reflex AOB = 360° - 94° = 266°
An inscribed angle is half of the central angle.
So,
ADB = of reflex AOB

ADB = of 266 = 133°
Question 48
1 / -0

What is the measure of x in the given figure?

A
60°

B
40°

C
80°

D
70°

Solution

In ,
AD = DC
(Angles opposite to equal sides are equal)
= 40°
Now, = (Exterior angle property)
= 80°
Now,
In ,
60° + 80° + x = 180° (Angle sum property of )
x + 140° = 180°
x = 40°
Question 49
1 / -0

What do we need to subtract from 99,999 to make it a perfect square?

A
43

B
58

C
256

D
143

Solution

We need to subtract 143 from 99,999 to make it a perfect square.
99,999 - 143 = 99,856, which is the square of 316.
Question 50
1 / -0

A swimming pool is in the form of an isosceles trapezium whose perimeter is 470 cm. One of its non-parallel side is 40 cm. What is the sum of parallel sides?

A
380 cm

B
385 cm

C
390 cm

D
395 cm

Solution

Let ABCD be the swimming pool which is in the form of a trapezium,
AB = 40 cm(Given)
Non-parallel sides of an isosceles trapezium are of equal length
Perimeter of trapezium ABCD = AB + BC + CD + DA
470 = (BC + DA) + 40 + 40
BC + DA = 470 - 80 = 390 cm
Hence, the sum of parallel sides = 390 cm
Question 51
1 / -0

In the given figure, O is the centre and m AOC = 130°. Then, m CBE is equal to

A
50°

B
100°

C
105°

D
115°

Solution

AOC = 130°
AOC = 2ABC [An angle subtended at the centre of a circle by an arc is twice than the angle subtended at any point on the circumference by the same arc]
130° = 2ABC
⇒ ABC = 130°/2 = 65°
ABC + CBE = 180° (Supplementary angles)
65° + CBE = 180°
CBE = 180° - 65° = 115°
Question 52
1 / -0

Find x in the given figure, if DC is parallel to MN.

A
45°

B
40°

C
37°

D
22°

Solution

From the given figure, we notice that:
AOC = DOM = 34°(Vertically opposite angles)
Also,
DOM = NMB = 34° (NM ∥ DC, Corresponding angles)
So, we have:
12° + x = 34°x = 34° - 12°x = 22°
Question 53
1 / -0

Find the measure of DOC in the rectangle ABCD.

A
73°

B
83°

C
82°

D
85°

Solution

ABCD is a rectangle.
In ACB,
ACB = 55°, ABC = 90°(Angle of rectangle)
BAC = 180° - 90° - 55° = 90° - 55°
BAC = 35°
AEO + BEO = 180° (Linear pair)
AEO + 118° = 180°
AEO = 180° - 118°
AEO = 62°
Now, in AOE,
AEO + OAE + AOE = 180° (Sum of angles of a triangle)
62° + 35° + AOE = 180°
AOE = 180° - 62° - 35° = 180° - 97°
AOE = 83°
AOE = DOC = 83°(Vertically opposite angles)
Question 54
1 / -0

In the given figure, O is the centre of the circle and AOC = 120°. Find the value of 2x + y.

A
150°

B
300°

C
350°

D
240°

Solution

As we know that angle made by same arc at circle, i.e. on the circumference, is half of the angle made by same arc at centre,
then, x = × 120° = 60°
x + y = 180° (Opposite angles of a cyclic quadrilateral are supplementary)
y = 180° - 60° = 120°
According to the question:
2x + y
= 2 × 60° + 120°
= 240°
Question 55
1 / -0

In the figure (not drawn to scale), ABC and CDF are two lines such that ACF is a right angle. If DG II CH II BI, find the value of angle 'x'.

A
25°

B
28°

C
30°

D
32°

Solution

Since BI II CH and AC is a transversal,
ABI = BCH (corresponding angles)
BCH = 60°
Now, ACF = 90° (given)
BCH + HCD = 90°
HCD + 60° = 90°
HCD = 90° - 60° = 30°
Also, CH II DG and CF is a transversal.
x = HCD (Corresponding angles)
x = 30°
Question 56
1 / -0

What is the ratio between the curved surface area of a cylinder and a sphere of the same radius if height of the cylinder is twice of radius?

A
1 : 1

B
3 : 1

C
4 : 1

D
5 : 1

Solution

Let the radii of both = r and height of cylinder = 2r
Then, ratio between curved surface areas = 2 × r × h : 4 × r × r,
= 2 × r × 2r : 4 × r × r = 1 : 1
Hence, answer option 1 is correct.
Question 57
1 / -0

In the following figure, AB and CD are perpendicular to BD. Find the length of side AC.

A
14 cm

B
13 cm

C
12 cm

D
11 cm

Solution

AB = PD = 13 cm
So, CP = CD - PD
CP = 18 - 13 = 5 cm
AP = BD = 12 cm
ΔAPC is a right angled triangle.
Using Pythagoras theorem,
AC² = AP² + PC²
= 12² + 5²
= 144 + 25 = 169
AC = 13 cm
Question 58
1 / -0

The height of a cylinder is 14 cm and its curved surface area is 264 sq. cm. The radius of its base is

A
3 cm

B
4 cm

C
2.4 cm

D
12.4 cm

Solution

Height = 14 cm
Curved surface area = 264 cm²

r = 3 cm
Question 59
1 / -0

What is the factorised form of 4x² + 17x - 15?

A
(x - 5) (4x + 3)

B
(x + 5) (4x - 3)

C
(x - 5) (4x - 3)

D
(x + 5) (4x + 3)

Solution

4x² + 17x - 15
= 4x² + 20x - 3x - 15
= 4x(x + 5) - 3(x + 5)
= (x + 5) (4x - 3)
Question 60
1 / -0

The curved surface areas of two spheres are in the ratio 1 : 4. Find the ratio of their volumes.

A
1 : 6

B
1 : 8

C
1 : 10

D
1 : 5

Solution

=
= ; =
Ratio of their volumes = =
Question 61
1 / -0

If the probability of Shreyan passing his exam is , what is the probability that he will fail?

A

B

C

D

Solution

Given probability of Shreyan passing his exam =
P(S) = (S success)
We have to find the probability that he will fail, i.e. P(F) (F Fail)
Since P(S) + P(F) = 1,
P(F) = 1 – P(S)
= 1 –
P(F) = [Success and failure are complementary to each other and P(A) + P() = 1, where A is the occurrence of event and is the non-occurrence of event A]
Hence, required probability =
Question 62
1 / -0

What is the difference between the circumferences of two circles, if their areas are in the ratio 4 : 1 and the radius of the smaller circle is 4 m?

A

B

C

D

Solution

Ratio of areas of two circles

Radius of smaller circle (r₂) = 4 m
According to the question,

Now, circumference of larger circle

Circumference of smaller circle

Therefore, difference is
Question 63
1 / -0

In the given figure, DE ∥ FG ∥ HI. What is the value of APQ?

A
115°

B
120°

C
125°

D
130°

Solution

It is given that DE ∥ FG ∥ HI.
Therefore, DE ∥ HI and AB is the transversal.
HBP = QPB = 50° (Alternate interior angles)
QPB + APQ = 180° (Linear pair)
APQ = 180° - 50°
APQ = 130°
Question 64
1 / -0

The base of a triangular field is four times its altitude. If the cost of leveling the field at Rs. 102.50 per metre² is Rs. 7,380, then find its base and height.

A
16 m and 4 m

B
28 m and 7 m

C
24 m and 6 m

D
20 m and 5 m

Solution

Area of the field = Total cost/Rate = 7,380/102.50 = 72 m²
Let altitude = x metres and base = 4x metres
Then, (1/2) × 4x × x = 72
x² = 36
x = 6 m
So, height = 6 m and base = 24 m
Question 65
1 / -0

The floor of a terrace consists of 4,000 tiles which are rhombus shaped and length of its diagonals are 75 cm and 50 cm. Find the total cost of polishing the floor, if the cost per m² is Rs. 280.

A
Rs. 7,50,000

B
Rs. 75,000

C
Rs. 2,10,000

D
Rs. 2,80,000

Solution

In each rhombus shaped tile, length of the diagonals = 75 cm and 50 cm
Therefore, area of each tile = (1/2) × 75 × 50 = 1,875 cm²
Therefore, area of 4,000 tiles = 4,000 × 1,875 cm² = 75,00,000 cm² = 75,00,000/10,000 = 750 m²
For 750 m², cost of polishing = Rs. 280 × 750 = Rs. 2,10,000
Question 66
1 / -0

Which of the following techniques would be best suited for separating soil from water?

A
Chromatography

B
Decantation

C
Fractional distillation

D
Filtration

Solution

A solution of soil and water can be best separated by filtration. Sand or soil is collected in the filter paper as residue and water is collected as filtrate.

Question 67

1 / -0

Consider the tabulated information given below regarding the methods of separation, types of mixtures and nature of mixtures.

Which of the following is/are incorrectly matched?

S. No.	Method	Type of Mixture	Nature of Mixture
1.	Magnetic separation	Solid-Solid	Heterogeneous
2.	Fractional distillation	Liquid-Solid	Heterogeneous
3.	Separating funnel	Liquid-Liquid	Heterogeneous
4.	Filtration	Liquid-Liquid	Heterogeneous

Only 1

Both 2 and 3

Both 2 and 4

Only 2

Solution

Fractional distillation is used to separate miscible liquids having different boiling points. These mixtures are homogeneous.
Filtration is used to separate suspension of a solid in a liquid. These mixtures are heterogeneous.
Hence, (2) and (4) are incorrectly matched.

Question 68
1 / -0

Identify solid fuel(s) from among the following:

a. Coal
b. Dung cake
c. LPG
d. Kerosene oil

A
Only a

B
Only b

C
Only c

D
Both a and b

Solution

Both coal and dung cake are solid fuels. Hence, option (4) is correct.
Question 69
1 / -0

Which of the following statements is/are false?

a. Fossil fuels are an important source of energy because they originate from living things.
b. The strong heating of coal in the presence of air is called destructive distillation of coal.
c. The ultimate source of energy is solar energy.

A
Only a

B
Only a and b

C
Only b

D
Only b and c

Solution

The strong heating of coal in the absence of air is called destructive distillation of coal. Hence, statement 'b' is incorrect.
Both the other statements are correct.
Question 70
1 / -0

If the oxygen supply is sufficient, then fuels burn completely, producing a blue flame. In which of the following cases is a blue flame produced?

a. The burning of LPG in a kitchen gas stove
b. The burning of kerosene in a lamp
c. The burning of a wax candle

A
Only a

B
Only a and b

C
Only b

D
Only b and c

Solution

The burner used for cooking is provided with holes in order to ensure a steady supply of oxygen and consequently complete combustion of LPG takes place, producing a blue flame.
The flame produced in a kerosene lamp and in a candle is reddish orange and luminous due to partial combustion.
Question 71
1 / -0

Which of the following is the richest mineral belt in India?

A
North-eastern peninsular belt

B
Central belt

C
South-western belt

D
North-western belt

Solution

The North-eastern Peninsular Belt comprising Chota Nagpur Plateau and Orissa Plateau in the states of Jharkhand, West Bengal and Orissa is the richest mineral belt of India. It contains large quantities of coal, iron ore, manganese, mica, bauxite, copper, kyanite, chromite, beryl, apatite, and many more minerals.
Question 72
1 / -0

________ is the largest producer of coal in India.

A
Jharkhand

B
Odisha

C
Andhra Pradesh

D
Madhya Pradesh

Solution

Jharkhand is the largest coal producing state in the country followed by Odisha, Chhattisgarh, West Bengal, Madhya Pradesh, Telangana and Maharashtra.
Question 73
1 / -0

Which of the following makes a metal stronger and corrosion resistant?

A
Alloying

B
Refining

C
Polishing

D
Extraction from its ore

Solution

Alloying is done by mixing a metal with other metals or a non-metal. This modifies several properties of metals like its tendency to get corroded while retaining the desirable properties like high tensile strength.
Question 74
1 / -0

Which of the following ores can be reduced simply by heating in the air?

A
ZnCO₃

B
ZnS

C
HgS

D
FeS

Solution

The metal oxides which occur near the bottom of activity series can be reduced to free metal by the action of heat alone. No reducing agent is required for this process.
Mercury occurs in nature as a sulphide ore, cinnabar (HgS). When HgS is roasted in the presence of excess air, it gets converted into HgO, which is unstable and decomposes to form mercury.
2HgS(s) + 3O₂(g) 2HgO(s) + 2SO₂(g)
2HgO(s) 2Hg(l) + O₂(g)
Question 75
1 / -0

Why is peat not used as an industrial fuel?

A
It has a high percentage of moisture and volatile matter.

B
Carbon content is less than 40%.

C
It gives more smoke and less heat.

D
All of the above

Solution

Peat is not an ideal industrial fuel as the carbon content (hence the calorific value) is low.
It has more impurities (moisture and volatile matter), hence produces more smoke causing atmospheric pollution.
Hence, option (4) is correct.
Question 76
1 / -0

Which of the following is a popular polyester?

A
Terylene

B
Nylon

C
Teflon

D
Polythene

Solution

Terylene is a popular polyester. It can be drawn into very fine fibres that can be woven like any other yarn.
Question 77
1 / -0

Which of the following is not a characteristic of synthetic fibres?

A
Synthetic fibres are cheaper than natural fibres.

B
Synthetic fibres are less durable than natural fibres.

C
Synthetic fabrics get dried up in less time.

D
Synthetic fibres are readily available.

Solution

Fibres which are obtained from natural sources are called natural fibres. For example – cotton, silk, wool, etc.
Synthetic fibres are synthesized using chemicals or by chemical treatment of natural materials. Structurally they are long chains of some repeating molecules.
These are more durable and stronger as compared to natural fibres.
Hence, the statement in the option (2) is incorrect.
Question 78
1 / -0

Which of the following fibres has properties similar to those of silk?

A
Bakelite

B
Acrylic

C
Melamine

D
Rayon

Solution

Rayon was the first semi-synthetic fibre to be formed by the chemical treatment of wood pulp.
It has a silk-like sheen but is more durable and versatile.
Question 79
1 / -0

The monomer used for the formation of polythene is:

A
Propene

B
Ethene

C
Ethyne

D
Ethane

Solution

Polythene is an addition polymer of ethene.
Question 80
1 / -0

A glass rod is rubbed with silk and brought near the cap of a negatively charged gold leaf electroscope. The leaf divergence will

A
decrease

B
increase

C
remain unchanged

D
first increase and then decrease

Solution

A positively charged glass rod induces a negative charge on the near end of the electroscope and a positive charge on the far end, thus reducing the charge on the leaves, and decreasing their divergence.
Question 81
1 / -0

The unit of e.m.f. of a cell is

A
dyne

B
volt

C
ampere

D
joule

Solution

E.m.f. of a cell is the potential difference across the terminal of the cell when no current flows through the circuit. So, the units of the e.m.f. are the same as those of the potential difference, or we can say that the unit of e.m.f. of a cell is volt.
Question 82
1 / -0

Which of the following is not a contact force?

A
Tension

B
Normal reaction

C
Nuclear force

D
Air friction

Solution

Nuclear force is the force that exists within the nucleus of the atom to bind the protons and neutrons together even if they are not in physical contact with each other, therefore, a non-contact force.
Question 83
1 / -0

A cricket ball of mass 70 g moving with a velocity of 0.5 m/s is stopped by a player in 0.5 s. What is the magnitude of force applied by the player to stop the ball?

A
0.07 N

B
0.09 N

C
1.22 N

D
1.08 N

Solution

v = 0
u = 0.5 m/s
t = 0.5 sec
m = = 0.07 kg
Force = Rate of change of momentum
=
= = - 0.07 N
The negative sign indicates that it is a retarding force.
Question 84
1 / -0

Two forces F and 2F are acting on a block as shown in the figure.

What is the resultant force acting on the block?

A
F

B
2F

C
3F

D
Zero

Solution

The given two forces are acting in the same direction, so the resultant of the both forces is the addition of the two forces.
Resultant force = F + 2F = 3F
Question 85
1 / -0

A boy is not able to inflate a balloon having holes. This is because

A
air exerts pressure in a particular direction

B
air cannot exert pressure

C
air exerts pressure in all the directions

D
None of these

Solution

Air exerts pressure in all the directions. The balloon has holes in it, so the air gets out of the balloon and is unable to exert the pressure on the walls of the balloon. As a result, the boy is unable to inflate a balloon having holes.
Question 86
1 / -0

A radio set of 80 W runs for 20 h. How much electrical energy is consumed?

A
1600 Wh

B
1.6 kWh

C
16 kWh

D
1600 kWh

Solution

Energy consumed is given by:

So,
Question 87
1 / -0

A resistor of 12 ohms is connected in parallel with another resistor x. The resultant resistance of the combination is 10 ohms. What is the value of resistor x?

A
22 ohms

B
5.45 ohms

C
24 ohms

D
60 ohms

Solution

12x = 10(x + 12)
12x = 10x + 120
2x = 120
x = 60 ohms
Question 88
1 / -0

How much work is done in moving a charge of 2 coulombs from a point of 120 V to a point of 150 V?

A
15 joules

B
30 joules

C
60 joules

D
5 joules

Solution

Work done in moving a charge in the potential difference is given by:
W = V × Q
Here, potential difference, V = 150 - 120 = 30 V
So, W = V × Q = 30 X 2 = 60 joules
Question 89
1 / -0

Ram has a laser pointer of red light. He directed a beam of light on a plane mirror, from the laser. What will happen to the colour of the light ray when it is reflected by the mirror?

A
The reflected light becomes white.

B
The red light changes into green light.

C
The red light remains the same in colour.

D
The red light becomes orange in colour.

Solution

The colour of the light remains the same bacause reflection does not change the colour of light.
Question 90
1 / -0

For how long does an impression of an image retain on the retina?

A
of a second

B
25 times of a second

C
of a second

D
of a second

Solution

An image stays on the retina for about 1/16 of a second. This is called persistence of vision.
It is because of this that when many still images are shown in a sequence, they give the illusion of moving images.
Question 91
1 / -0

Which of the following parts of an eye provides most of the optical power to the eye?

A
Iris

B
Cornea

C
Retina

D
None of these

Solution

The cornea is the eye's outermost layer. It is the clear, domeshaped surface that covers the front of the eye. Cornea provides most of the optical power to the eye. It provides most of the focusing power when light enters the eye. The iris adjusts the size of the pupil and regulates the amount of light that enters the eye.
Question 92
1 / -0

The part of the eye that gives it its distinctive colour is

A
iris

B
pupil

C
cornea

D
retina

Solution

The colour of the eyes is due to the colour of the diaphragm of the iris present around the pupil that controls the amount of light entering the eyeball. Iris gives the eye its distinctive colour.
Question 93
1 / -0

Speciation cannot occur in groups of individuals that

A
reproduce asexually

B
reproduce sexually

C
are geographically isolated from other individuals

D
do not interbreed with other species

Solution

Speciation means formation of new species from already existing species. This occurs due to gradual accumulation of changes over hundreds of generations. Since changes in the genetic makeup do not occur in asexual reproduction, the chances of speciation are reduced to almost nil for individuals reproducing by asexual methods.
Question 94
1 / -0

Which of the following is an evidence for the origin of birds from reptiles?

A
Presence of scales

B
Presence of feathers

C
Presence of claws

D
Presence of hairs

Solution

Some dinosaurs had feathers, although they could not fly using the feathers. Birds seem to have later adapted the feathers to flight. This, of course, means that birds are very closely related to reptiles, since dinosaurs were reptiles.
Question 95
1 / -0

Which of the following statements is false about cell membrane?

A
It is semi-permeable.

B
It is flexible.

C
It is non-living.

D
It is made of lipoproteins.

Solution

Cell membrane is the outermost thin, flexible, living membrane of a cell. It possesses fine pores. The principal components of the plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrate groups that are attached to some of the lipids and proteins.
Question 96
1 / -0

Which of the following cell structures dictates ribosomes to synthesise proteins?

A
Plastids

B
Mitochondria

C
Nucleolus

D
Golgi apparatus

Solution

The nucleolus makes ribosomal subunits from proteins and ribosomal RNA, also known as rRNA. It then sends the subunits out to the rest of the cell where they combine into complete ribosomes.
Question 97
1 / -0

Name the two gases which together constitute the major component of atmosphere.

A
Nitrogen and oxygen

B
Nitrogen and carbon dioxide

C
Nitrogen and carbon monoxide

D
Carbon dioxide and carbon monoxide

Solution

Nitrogen and oxygen are the main components of the atmosphere by volume. Together, these two gases make up approximately 99% of the dry atmosphere. Both of these gases have very important associations with life.
Question 98
1 / -0

In which state of India is wet agriculture practised?

A
Tamil Nadu

B
Karnataka

C
Andhra Pradesh

D
Kerala

Solution

Wet farming is a type of farming which depends mainly upon rain. This type of farming is prevalent in the North, North-Eastern, Eastern India and the Western slopes of the Western Ghats. Kerala lies on the Western slopes of the Western Ghats. So, in Kerala, wet agriculture is practised.
Hence, option (4) is correct.
Question 99
1 / -0

Which of the following is a favourable condition for producing biogas?

A
Cow dung and vegetable waste decomposed in the presence of oxygen

B
Cow dung and vegetable waste decomposed in the absence of oxygen

C
Cow dung and vegetable waste decomposed in the presence of oxygen and natural gas

D
Cow dung and vegetable waste decomposed in the presence of oxygen and chlorine

Solution

Biogas is a mixture of gasses produced during decay of biomass like cow dung, various plant materials like residue after harvesting the crops, vegetable wastes etc, and are decomposed in the absence of oxygen. It is a clean fuel produced from anaerobic digestion.
Question 100
1 / -0

Which of the following is not a constellation?

A
Ursa Major

B
Ursa Minor

C
Orion

D
Milky way

Solution

Ursa Major and Ursa Minor are the types of circumpolar constellation. The Milky Way is the galaxy that contains the Solar System. Orion is a type of constellation.