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An electric iron draws a current of 15A from a 220 V supply. What is the cost of using the iron for 30 minutes everyday for 15 days if the cost of unit (1 unit = 1 kW hr) is 2 rupees?
I = 15A, V = 220V, t = 30 minutes Energy = P × t = VI t = 220 × 15 × 30/60 × 15 = 3300 × 1/2 × 15 W hr = 3.3 kWx 7.5 hr = 24.75 kW hr Cost = 24.75 × 2 = Rs. 49.50
The type of radiation absorbed by CO2 molecule in atmosphere are
CO2 in the atmosphere does not allow infrared rays from the earth to escape causing green house effect.
The distance covered by a body moving along X-axis with initial velocity 'u' and uniform acceleration 'a' is given by x = ut + 1/2 at2. This result is a consequence of
It is the fundamental equation of motion, so it is not the consequence of Newton's laws of motion.
A parachutist of weight W strikes the ground with his legs fixed and comes to rest with an upward acceleration of magnitude 3 g. The force exerted on him by the ground during the landing is
Mg = W N - W = 3mg N - W = 3W N = 4W
A technician has 10 resistors each of resistance 0.1Ω . The largest and smallest resistance that he can obtain by combining these resistors are
R5 = 10 × 0.1 = 1Ω (largest) RP = 0.1/10 = 0.01 Ω (smallest)
The electronic configuration of an ion M2+ is 2, 8, 14. If its mass is 56, the number of neutrons in its nucleus is
M2+ = 2, 8, 14; ⇒ Electronic Configuration of M = 2, 8, 16So, total electrons in M will be 26 i.e. atomic number (Z) = 26, mass number (given) = 56 ∴ Number of neutrons = A – Z = 56 – 26 = 30
The normality of 0.3 M phosphoric acid is
Normality = n–factor × Molarity n–factor = 3(for H3PO4) and molarity = 0.3 M (given) ∴ Normality = 0.3 × 3 = 0.9
Arrange the following elements in order of their increasing ionisation energy O, S, Se, Te, Po.
Ionisation energy decreases from top to bottom in a group. So, increasing order will be:
Po < Te < Se < S < O
Which one of the following metal oxides shows both acidic and basic characters?
Al2O3 is an amphoteric oxide. Rest of them are basic.
Which of the following will have equal number of electrons?
Na+ and Mg2+ are isoelectronic in nature having 10 electrons each.
Which of the following gases is known as tear gas?
Chloropicrin is commonly used as tear gas. Its chemical formula is CCl3NO2
Mitosis
Daughter cells carry diploid number of chromosomes after mitosis cell division, so its known as equational division. There is no crossing over that takes place in mitosis cell division.
Wings of birds and insects are
Analogous organs are similar in function but are anatomically different and unrelated.
Mitochondria and chloroplasts are similar because
Both are semiautonomous organelles. Both of these possess circular DNA.
Cut leaves remain green for longer time if dipped in
Cytokinins delay senescence (ageing), so chrolophyll will be retained and leaves will remain green for a longer time.
Neurons have a unique property that makes them to communicate with other cells via
Synapses is a junction between two neurons.
Which layer earth's atmosphere protects it from the harmful UV radiations of the sun?
Stratosphere has ozone which protects the earth from the harmful UV rays. The ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (UVR) from the sun, protecting life on Earth from its potentially harmful effects.
Cramps in the leg muscle after running a long distance are because of
In scarcity of O2, muscle cells undergo anaerobic respiration. In this type of respiration partial breakdown of glucose takes place and lactic acid is formed which leads to cramps.
The enzyme pepsin is secreted by the
Chief cells are present in the lining of stomach which secrete pepsin enzyme.
Pick the odd one out.
Malaria is a communicable (protozoan) disease caused by plasmodium vivax while others are congential (genetic) disorders.
Vegetative propagation refers to the formation of new plants from
Vegetative propagation refers to the formation of new plants from vegetative (stem, leaves and roots) of the plants.
Which one of the following is a correct statement with respect to Mendelian inheritance?
Recessive trait can be expressed in homozygous condition only, whereas dominant trait can be expressed in both homozygous and heterozygous conditions.
A shopkeeper mixes 80 kg sugar worth of Rs. 6.75 per kg with 120 kg of sugar worth of Rs. 8 per kg. He earns a profit of 20% by selling the mixture. He sells it at the rate of
Total cost = 80 × 6.75 + 120 × 8 = Rs. 1500 Selling price = 1500×120/100 = Rs. 1800 S.P. per kg = 1800/200 = Rs. 9
A shopkeeper prefers to sell his goods at the cost price but uses a weight of 800 g instead of 1 kg weight. He earns a profit of
Let CP of 1 g = Re. 1 Given he sells 800 g instead of 1000 g So, CP of 800 g = Rs. 800 SP of 800 g = CP of 1000 g = Rs. 1000 Let CP of 1 g = Re. 1 Given he sells 800 g instead of 1000 g So, CP of 800 g = Rs. 800 SP of 800 g = CP of 1000 g = Rs. 1000 Profit = 1000 – 800 = 200 Profit % = 200/800×100 = 25%
For the distribution
the sum of the lower limits of the median class and the modal class is
Median class is 10 - 15 Modal class is 15 - 20 Sum of lower limits = 25
The sum of all two digit numbers each of which leaves remainder 3 when divided by 5 is
13, 18, ..... 98 In this A.P., let the number of terms be 'n'. 98 = 13 + (n - 1)5 85 = (n - 1)5 n =18 terms S18 = 18/2 [2 × 13 + 17 × 5] = 999
If cosA + cos2A = 1, then the value of sin2A + sin4 is
cos A + cos2 A = 1 cos A = 1 – cos2 A = sin2 A Now sin2 A + sin4 A = sin2 A + (sin2 A)2 = sin2 A + cos2 A = 1
'When France Sneezes, the rest of Europe catches cold'. This was the remark of
Metternich said this and he meant that whatever happens in France, affects the rest of Europe.
Until medieval times Jews lived in separately marked areas known as
A part of the city which is predominantly occupied by an ethnic group.
In 1860 the famous expedition of the thousands to South Italy was led by
Garibaldi led thousands of armed volunteers in 1860 to south Italy.
The Dutch started 'Scientific forestry' in
The Dutch started scientific forestry at Java.
The 'slavs' belong to a geographical region in
The people living in Balkan region were known as slavs.
In 1940 Vietnam was occupied by
Japan, during the Second World War attacked and occupied Vietnam in 1940.
The city that was a group of seven islands under Portuguese control in the seventeenth century is
Bombay was occupied by the Portuguese initially and later on handed over to the British.
The novel that deals with Indian peasantry is
Godan, written by Premchand deals with the life of an Indian peasant.
Samburu National Park is in
Sambru National Park is in Kenya.
The 'Swaraj flag' designed by Gandhiji consorted which of the following three colours?
By 1921, Gandhiji had designed the Swaraj flag. It was again a tricolour (red, green and white) and had a spinning wheel in the centre, representing the Gandhian ideal of self-help. Carrying the flag, holding it aloft, during marches became a symbol of defiance.
Which of the following common foods did not come from the 'new world'?
Potatoes, tomatoes, chilies, groundnuts, maize and sweet potatoes were introduced by the travelers and explorers.
Indicate the correct chronological order in which of the following artisans helped in the production of cloth?
A. Stapler B. Weavers C. Fullers D. Spinners E. Dyers
A merchant clothier in England purchased wool from a wool stapler, and carried it to the spinners; the yarn (thread) that was spun was taken in subsequent stages of production to weavers, fullers and then to dyers.
Which of the following countries does not share its boundaries with India?
Tajikistan is the only country which does not share its boundary with India.
The Eastern most longitude of India is
97° 25` E is the Eastern most longitude of India.
Under which of the following type of resources can tidal energy be classified?
Tidal energy is renewable as long as we have the ocean water and the moon.
Which one of the following is a leguminous crop?
Pulses are an example of leguminous crops.
Which of the following rivers flows through a rift valley?
Narmada is the only river in India which flows through a rift valley.
Which one of the following is the main cause of land degradation in Punjab?
Intensive cultivation enhanced by excessive use of chemical fertilizers has caused land degradation in Punjab.
Which one of the following is a non-metallic mineral?
Limestone is a non-metallic mineral.
Which of the following agencies markets steel for the public sector plants?
SAIL is responsible for the marketing of steel for the public sector plants in India.
Which of the following is an inland riverine port?
Kolkata is an inland riverine port.
Which of the following states is not connected with the Hazira–Vijaipur–Jagdishpur (HVJ) pipeline?
HVJ pipeline starts from Hazira in Gujarat via Vijaipur in Madhya Pradesh to Jagdishpur in Uttar Pradesh.
In which of the following states is black soil found?
Black soil is mainly found in Maharashtra.
Which type of drainage pattern is formed when the river channel follows the slope of the terrain?
The dendritic pattern develops where the river channel follows the slope of the terrain. A river joined by its tributaries, at approximately right angles, develops a trellis pattern. A rectangular drainage pattern develops on a strongly jointed rocky terrain. The radial pattern develops when streams flow in different directions from a central peak or dome like structure.
The Constitution of India declares India to be
The Constitution of India declares India to be a union of states.
Which of the following states enjoys special status according to the Constitution?
Under Article 370 of the Constitution J & K enjoys a special status.
Which of the following institutions reserves seats for women?
In Panchayats 50% seats are reserved for women.
A coalition gvernment means
A coalition government, or coalition cabinet, is a cabinet of a parliamentary government in which several parties cooperate.
The party that remained in power for 30 years without any break and believes in Marxism
Communist Party of India Marxist remained in power in West Bengal for 30 years and Jyoti Basu as the longest serving Chief Minister of any state of India.
What do you understand by the term 'defection'?
In politics, a defector is a person who gives up allegiance to one party in exchange for allegiance to another, in a way which is considered illegitimate by the first party.
Who was the Chairperson of the Drafting Committee of the Constituent Assembly of India?
Dr. B. R. Ambedkar was the Chairperson of the Drafting Committee of the Constituent Assembly of India.
Who is the Chairman of the Planning Commission of India?
Prime Minister is the ex-officio Chairman of the Planning Commission of the India.
How many Fundamental Rights are there in Indian Constitution?
The Fundamental Rights in the Indian Constitution include: 1. Right to Equality, 2. Right to Freedom, 3. Right against Exploitation, 4. Right to Freedom of Religion, 5. Cultural and Educational Rights, 6. Right to Constitutional Remedies.
Which article of the Indian Constitution is regarded as the soul of the Indian Constitution?
Dr. B. R. Ambedkar called Article 32 of the Indian Constitution, i.e. right to constitutional remedies, as 'the heart and soul of the Constitution'. It was made so because mere declaration of the fundamental right without an effective machinery for enforcement of the fundamental rights would have been meaningless.
What does the term 'Secular' mean in the Indian context?
In the Indian context 'Secular' means that there is no official religion for the Indian state.
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