Self Studies

AISSEE - 6-Jan-2019 - Class-IX - Set-B

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AISSEE - 6-Jan-2019 - Class-IX - Set-B
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Which of the following is equal to x3 - 225x?

    Solution

    x3 - 225x
    = x(x2 - 225)
    = x( x2 - (15)2)
    = x((x + 15)(x - 15))
    = x(x - 15)(x + 15)

     

  • Question 2
    1 / -0

    If the dimensions of a room are I, b and h, (I → length, b → breadth and h → height), then which of the following is the area of its four walls?

    Solution

    Area of four walls of the room = 2 × l × h + 2 × b × h

    = 2 h(l + b)

     

  • Question 3
    1 / -0

    If [1X 2Y 6Z] is a number divisible by 9, then the least value of X + Y + Z is:

    Solution

    The prime factors of 9 are 3 and 3. So, we will see if the sum of the digits is divisible by 9. If it is, then the actual number is also divisible by 9.
    So, [1X 2Y 6Z ]
    = 1 + X + 2 + Y + 6 + Z]
    = [9 + X + Y + Z]
    So, the sum of (X + Y + Z) should be equal to 0, which is the least number from the given options.

     

  • Question 4
    1 / -0

    Which of the following is the multiplicative identity for rational numbers?

    Solution

    According to the multiplicative identity property of 1, any number multiplied by 1 gives the same result as the number itself. It is also called the identity property of multiplication, because the identity of the number remains the same.
    For example, 11 × 1 = 11

     

  • Question 5
    1 / -0

    The mid value of a class interval is 42. If the class size is 10, then the upper and lower limits of the class are

    Solution

    Let the upper and lower limits be x and y, respectively.
    Now, (x + y) ÷ 2 = 42
    x + y = 42 × 2
    x + y = 84 ... (1)
    Again,
    Class size = 10 (given)
    x - y = 10 ... (2)
    Add equations 1 and 2:
    2x = 94
    x = 94 ÷ 2
    x = 47
    From equation 2,
    47 - y = 10
    y = 47 - 10
    y = 37
    So, lower limit = 37 and upper limit = 47

     

  • Question 6
    1 / -0

    36 is divided into two parts such that 5 times the first part added to 3 times the second part makes 142. The two parts are

    Solution

    Let the first part be x and the second part be (36 - x).
    So, according to the question,
    5x + 3(36 - x) = 142
    5x + 108 - 3x = 142
    2x = 142 - 108
    2x = 34
    x = 17
    First part = x = 17
    Second part = 36 - x = 36 - 17 = 19

     

  • Question 7
    1 / -0

    The smallest whole number by which 44 should be multiplied so as to make it a perfect square is

    Solution

    First we will find the factors of 44.
    44 = 11 × 2 × 2
    Now, we see that 2 is already 2 times; only 11 is 1 times.
    So, if we multiply it by 11, it becomes a perfect square of 2 × 11 = 22 .
    Multiplying, 44 × 11 = 484
    Therefore, if we multiply 11 in the number 44, we get a perfect square.
    As ∠484 = 22, the required number is 11.

     

  • Question 8
    1 / -0

    Cubical boxes of volume 15,625 cm3 each are put in a cubical store of side 2.5 m. How many such boxes can be put in the store?

    Solution

    2.5 m = 2.5 × 100 = 250 cm
    Now, since it's a cubical store, the volume is:
    (250 cm)= 1,56,25,000 (cm)3
    Thus, number of boxes = 1,56,25,000 ÷ 15,625 = 1000

     

  • Question 9
    1 / -0

    If the sum of the lengths of bases of a trapezium is 12 cm and area is 14.1 cm2, then its altitude will be

    Solution

    Area of a trapezium = 1/2 h(a + b)

    Area = 14.1 cm(given)

    Then, 1/2 h(a + b) = 14.1 cm2

    1/2 h × 12 = 14.1

    h = (14.1 × 2) / 12

    = (28.2) / 12

    = 2.35 cm

     

  • Question 10
    1 / -0

    If the length, width and height of a cuboid are 4.2 m, 3 m and 1.1 m, then its capacity in litres will be

    Solution

    Length = 4.2 m
    Breadth = 3 m
    Height = 1.1 m
    Volume = length × breadth × height
    = 4.2 × 3 × 1.1 = 13.86 m3
    = 13.86 m3 = 13.86 × 1000 = 13,860 litres

     

  • Question 11
    1 / -0

    A solid cuboidal piece of wood measures 3 m × 2.5 m × 8 cm. Find the weight of the piece, if 1 cubic cm of wood weighs 9 grams.

    Solution

    Volume = l × b × h
    = 300 × 250 × 8 (1 m = 100 cm)
    = 600,000 cm3
    1 cubic cm = 9 g
    6,00,000 cubic cm = (6,00,000 × 9) ÷ 1000
    = 5400 kg

     

  • Question 12
    1 / -0

    A well was dug with 14 m inner diameter and was 8 m deep. The earth dug out of it was evenly spread out on a rectangular plot of size 10 m and 8 m. Find the raise in the height of the plot.

    Solution

    Basically, the logic we use in any volume conversion problem is that the total volume of first figure is equal to the total volume of second figure.
    So, here, volume of the earth dug out of well = volume of the rectangular plot
    Let h be the height of the plot.
    Diameter of the well = 14 m
    Thus, radius, R = Diameter / 2 = 7 m

    Depth (height) of well H = 8 m
    Dimensions of the plot = 10 m × 8 m
    By condition said above, πR2H = lbh

    Or 22/7 × (7)2 × (8) = 10 × 8 × h
    Or h = 22×7 / 10 
    Or h = 15.4 m
    Thus, the height of the plot is 15.4 m.

     

  • Question 13
    1 / -0

    Sum of the digits of a two-digit number is 9. If 9 is subtracted from the number, the digits interchange their places. The original number is

    Solution

    Let us assume that x and y are the tens and ones places of a two-digit number.
    Therefore, two-digit number = 10x + y and reversed number = 10y + x
    Given: x + y = 9 --- (1)
    Also given, 10x + y - 9 = 10y + x
    9x - 9y = 9
    x - y = 1 --- (2)
    Adding equations 1 and 2,
    2x = 10
    So, x = 10 ÷ 2 = 5
    Therefore, y = 9 - x = 9 - 5 = 4
    Therefore, required two-digit number = 10x + y = 10 × 5 + 4 = 54

     

  • Question 14
    1 / -0

    From a pack of 52 playing cards, one card is drawn at random. The probability of the drawn card being a black ten or a king is

    Solution

    There are four cards of number 10 in a deck of 52 cards out of which two are black.
    Number of black tens = 2
    Number of kings = 4
    Therefore, number of favourable outcomes = 4 + 2 = 6
    Thus, required probability = 6/52 = 3/26

     

  • Question 15
    1 / -0

    A spider is climbing a wall. It climbs up 5 cm, falls back 3 cm, climbs up another 4 cm, falls back 6 cm and climbs up another 5 cm. How far the spider has climbed from its starting point?

    Solution

    It climbs 5 cm. It falls 3 cm, means it is 2 cm away from the starting point. It climbs up 4 cm. It was 2 cm away and now has climbed 4 cm also, so it is 6 cm away from the starting point. It falls back 6 cm, means it again reaches the starting point. It climbs up another 5 cm. So, the spider has climbed up 5 cm from the starting point.

     

  • Question 16
    1 / -0

    The smallest square number which is divisible by each one of the numbers 8, 9 and 10 is

    Solution

    LCM of 8, 9, 10 = 2 × 2 × 2 × 3 × 3 × 5 = 360
    Since 2 and 5 are not in pairs, multiply by 2 and 5 to make it a perfect square.
    Required number = 360 × 2 × 5 = 3600
    The smallest square number divisible by 8, 9 and 10 is 3600.

     

  • Question 17
    1 / -0

    If 25% of a number is less than 18% of 650 by 19, then find the number.

    Solution

    Let the number be x.

    A.T.Q.

    25% of x = 18% of 650 - 19

    25/100x = 18/100 × 650 - 19

    x/4 = 9 × 13 - 19

    x/4 = 117 -19

    x/4 = 98

    x = 98 × 4

    x = 392

     

  • Question 18
    1 / -0

    If the cost price is 25% of the selling price, then the profit percentage is

    Solution

    Let SP = Rs. 100
    Then, CP = 25% of SP = Rs. 25
    Therefore, profit = 100 - 25 = Rs. 75
    Profit = Rs. 75
    Profit % = 75/25 × 100 = 300%

     

  • Question 19
    1 / -0

    Area of a rectangle whose length is 4ab and breadth is 6b2 is

    Solution

    Area of the rectangle = L × B
    = 4ab × 6b2
    = 24ab(2 + 1)
    = 24ab3

     

  • Question 20
    1 / -0

    The total surface area of a cone having its slant height 9 dm and diameter of its base 24 dm is

    Solution

    Diameter = 24 dm
    So, radius = half the diameter = 12 dm
    Total surface area of the cone = πr(l + r)
    Here, r is radius and l is slant height of the cone.
    = 22/7 × 12 × (9 + 12)
    = 22/7 × 12 × 21
    = 22 × 12 × 3
    = 792 sq. dm

     

  • Question 21
    1 / -0

    If x + y = 12 and xy = 27, then the value of x3 + yis

    Solution

    We know (x + y)= x+ 3x2y + 3xy+ y3
    = x+ y+ 3xy(x + y)
    x+ y= (x + y)- 3xy(x + y)
    = (12)- 3(27) × (12)
    = 1728 - 972
    x3 + y= 756

     

  • Question 22
    1 / -0

    The face value of each share is Rs. 10. If dividend is 16%, then what will be the income from 600 shares?

    Solution

    Given:
    Face value = Rs. 10
    Share = 600
    Total amount = 600 × 10
    = 6000
    Dividend = 16%
    Dividend income = 16% of total amount
    = 16/100 × 6000 = 960

     

  • Question 23
    1 / -0

    A solid gold ball of radius 7 cm was melted and then drawn into a wire of diameter 0.2 cm. Find the length of the wire.

    Solution

    Given: Radius of the ball (R) = 7 cm
    Also, diameter of the wire = 0.2 cm
    Radius of the wire (r) = 0.2 / 2 = 0.1 cm
    Let the length of the wire be h.
    Volume of the metal used in wire = Volume of the ball
    πr2h = 4/3 πR3
    π × (0.1)2 × h = 4/3 × π ×73
    1/100 × h = 4/3 × 343
    h = 4/3 × 343 × 100
    h = 45733.33 cm
    h = 457.33 m
    Therefore, the length of the wire is 457.33 m.

     

  • Question 24
    1 / -0

    The value of 10001is

    Solution

    100012 = (10000 +1)2 = 100000000 + 1 + 20000
    = 100020001

     

  • Question 25
    1 / -0

    With the help of ruler and compass, it is not possible to construct an angle of

    Solution

    With the help of a ruler and a compass, we can construct the angels 90°, 60°, 45°, 22.5°, 30°, etc, and the bisector of an angle. So, it is not possible to construct an angle of 40°.

     

  • Question 26
    1 / -0

    What time period is taken when interest is calculated half yearly?

    Solution

    The time period after which the interest is added each time to form a new principal is called the conversion period.
    When the interest is compounded half yearly, there are two conversion periods in a year each after 6 months.
    In such situations, the half yearly rate will be half of the annual rate and time period when interest is calculated half yearly is twice as much as the number of given years.

     

  • Question 27
    1 / -0

    If a number is doubled, then which of the following is a correct statement?

    Solution

    Its cube is eight times the cube of the given number.
    Let the number be 2.
    Now, double the number. We will get 4.
    Cube of 4 = 43 = 4 × 4 × 4 = 64
    If we cube the given number 2, we will get 8.
    So, only fourth option will satisfy the condition.

     

  • Question 28
    1 / -0

    Identify the tense in the sentence given below.

    When I arrived, Ram had just left.

    Solution

    Past perfect tense is used when an action was finished at some point in the past before something else happened; had + past participle form of verb is used in past perfect tense.

     

  • Question 29
    1 / -0

    The synonym of the word 'SPLENDID' is

    Solution

    'Splendid' means 'magnificent; very impressive'.

     

  • Question 30
    1 / -0

    The word 'brittle' means

    Solution

    'Brittle' means 'anything hard but liable to break easily'.

     

  • Question 31
    1 / -0

    Find out the part containing error in the given statement.

    He is one of the talented student in our class.

    Solution

    'He' is one among many talented students. So, with 'one of', we use a plural noun.

     

  • Question 32
    1 / -0

    Find out the part containing error in the given statement.

    The thief was taken to the nearby police station.

    Solution

    The correct phrase should be 'taken to a' as the 'thief' could have been taken to any nearby police station. So, indefinite article 'a' is to be used.

     

  • Question 33
    1 / -0

    Fill in the blank by choosing the appropriate preposition from the given options.

    They have gone _______ an excursion.

    Solution

    Here, 'on' means 'to be engaged in something', here an 'excursion'. 'For' is used to indicate a function, which does not fit here. Other options are out of context.

     

  • Question 34
    1 / -0

    Fill in the blank by choosing the appropriate preposition from the given options.

    The team rebelled _______ the captain.

    Solution

    'Against' is used as a preposition when you do something against somebody or something. With 'rebel', we use 'against'.

     

  • Question 35
    1 / -0

    Choose the correct option if the given statement is changed into comparative degree.

    Silver is one of the most useful metals.

    Solution

    'More useful' would be the comparative form. This is found only in options 3 and 4. In option 3, 'than all other metals' is stated, but the given statement states 'one of the most useful metals'. 

     

  • Question 36
    1 / -0

    Choose the correct option if the given statement is changed into comparative degree.

    Learning Italian is not as difficult as learning Japanese.

    Solution

    'More difficult' is the comparative form of 'difficult', but 'difficult to' is not used with this comparative form. So, option 1 is ruled out. 'In Italian' is incorrect usage, so option 3 is incorrect. Option 2 is incorrect as it changes the meaning.

     

  • Question 37
    1 / -0

    The adjective form of 'apathy' is

  • Question 38
    1 / -0

    The noun form of 'proud' is

    Solution

    'Pride' is the abstract noun form of 'proud'.

     

  • Question 39
    1 / -0

    Directions For Questions

    Directions: Read the following passage and answer the question that follows.

    Books are by far the most lasting product of human effort. Temples crumble into ruins. Pictures and statues decay, but books survive. Time does not destroy the great thoughts which are as fresh today as when they first passed through the author's mind ages ago. The only effect of time has been to throw out the bad products, for nothing in literature can survive long unless it is really good and of lasting value. Books introduce us to the best society; they bring us into the presence of the greatest minds that have ever lived, we hear what they said and did; we see them as if they were really alive, we sympathise with them, enjoy with them and grieve with them.

    ...view full instructions

    According to the passage, books live forever because

    Solution

    The passage mentions that books survive as "time does not destroy the great thoughts which are as fresh today as when they first passed through the author's mind ages ago".

     

  • Question 40
    1 / -0

    Directions For Questions

    Directions: Read the following passage and answer the question that follows.

    Books are by far the most lasting product of human effort. Temples crumble into ruins. Pictures and statues decay, but books survive. Time does not destroy the great thoughts which are as fresh today as when they first passed through the author's mind ages ago. The only effect of time has been to throw out the bad products, for nothing in literature can survive long unless it is really good and of lasting value. Books introduce us to the best society; they bring us into the presence of the greatest minds that have ever lived, we hear what they said and did; we see them as if they were really alive, we sympathise with them, enjoy with them and grieve with them.

    ...view full instructions

    According to the passage, temples, pictures and statues belong to the same category because

    Solution

    The passage mentions, "Temples crumble into ruins. Pictures and statues decay, but books survive.

     

  • Question 41
    1 / -0

    Directions For Questions

    Directions: Read the following passage and answer the question that follows.

    Books are by far the most lasting product of human effort. Temples crumble into ruins. Pictures and statues decay, but books survive. Time does not destroy the great thoughts which are as fresh today as when they first passed through the author's mind ages ago. The only effect of time has been to throw out the bad products, for nothing in literature can survive long unless it is really good and of lasting value. Books introduce us to the best society; they bring us into the presence of the greatest minds that have ever lived, we hear what they said and did; we see them as if they were really alive, we sympathise with them, enjoy with them and grieve with them.

    ...view full instructions

    Books introduce us into the best society as

    Solution

    The passage mentions "Books introduce us to the best society; they bring us into the presence of the greatest minds that have ever lived ...".

     

  • Question 42
    1 / -0

    Choose the correct word to fill in the blank.

    Radha,''I won't buy a new car''.

    Radha said that she ______ buy a new car.

    Solution

    In the indirect form of speech, "won't" changes to "wouldn't".

     

  • Question 43
    1 / -0

    They will ask you a lot of questions at the interview.

    The sentence, when changed into the passive voice, would read as:

    Solution

    The sentence is in the future tense in active voice. So, the answer will also be in the same tense when we change it into passive voice.

     

  • Question 44
    1 / -0

    The phrase in cold blood means

    Solution

    If someone kills 'in cold blood', he/she kills in a way that is cruel, without showing any emotion.

     

  • Question 45
    1 / -0

    Choose the correct option to fill in the blank.

    The workers went out of the factory __________ to hold a protest rally.

    Solution

    The term 'en masse' means 'in large numbers', which is the most appropriate answer. 'En route' means 'on the way', 'impasse' means 'a deadlock' and 'de facto' means 'in fact'.

     

  • Question 46
    1 / -0

    To put up with means

    Solution

    The given phrase means 'to bear or tolerate'.

     

  • Question 47
    1 / -0

    Fill in the blank with a possessive pronoun chosen from those given below.

    Mani declared that the book was not ______.

    Solution

    'Hers' is the appropriate possessive pronoun here. Other options would require a noun after them.

     

  • Question 48
    1 / -0

    The correctly punctuated sentence is

    Solution

    A comma is required after 'said', "Where's" starts with a capital letter, an apostrophe is used in "Where's", and a question mark is used at the end within the quotes.

     

  • Question 49
    1 / -0

    To let the cat out of the bag means

    Solution

    The phrase means 'to allow a secret to be known'.

     

  • Question 50
    1 / -0

    Choose the correct order to make the sentence below meaningful.

    month (1)/ while (2)/ Mumbai (3)/ last (4)/ it (5)/ in (6)/ happened (7)/ living (8)/ I was (9)

    Solution

    The correct order of the words is: 'It happened while I was living in Mumbai last month".

     

  • Question 51
    1 / -0

    The adjective form of 'ADVANTAGE' is

    Solution

    The rest of the words are incorrect grammatically. 'Advantageous' is used as an adjective, like "He was in an advantageous position".

     

  • Question 52
    1 / -0

    The active voice of ''He had not been invited by us'' is:

    Solution

    Here, the object 'us' becomes the subject 'we', and the subject 'he' becomes 'him'. In active voice, 'had been + past participle' changes to 'had + past participle'. So, option 3 is the correct answer. 'Not' is missing in options 1 and 2, thereby changing the meaning.

     

  • Question 53
    1 / -0

    The stage of the embryo in which all the body parts can be identified is:

    Solution

    The embryo gets embedded in the wall of the uterus for further development. The embryo continues to develop in the uterus. It gradually develops the body parts such as hands, legs, head, eyes, ears, etc. The stage of the embryo in which all the body parts can be identified is called a fetus.

     

  • Question 54
    1 / -0

    Diabetes is due to the malfunctioning of

    Solution

    Diabetes occurs when glucose builds up in the blood due to the pancreas not producing enough insulin (or not using it correctly) resulting in low energy levels. Overactive adrenal glands usually produce too much cortisol and possibly other adrenal hormones (i.e. epinephrine, aldosterone). Since cortisol plays a role in elevating blood sugar, this is often accompanied by an increased blood sugar level.

     

  • Question 55
    1 / -0

    Naphthalene balls are obtained from

    Solution

    Most naphthalene is derived from coal tar. Although the composition of coal tar varies with the coal from which it is produced, typical coal tar is about 10% naphthalene by weight.
    Naphthalene is an organic compound with formula C10H8. It is the simplest polycyclic aromatic hydrocarbon, and is a white crystalline solid with a characteristic odor that is detectable at concentrations as low as 0.08 ppm by mass. As an aromatic hydrocarbon, naphthalene's structure consists of a fused pair of benzene rings.

     

  • Question 56
    1 / -0

    John accidentally placed his hand over a flame and immediately pulled it back. He felt the sensation of heat and reacted due to the action of:

    Solution

    John felt the sensation of heat and reacted due to the response to stimulus by the nerve cells. When he placed the finger into fire, the nerve endings in the finger upon receiving the heat stimulus sent it to the brain and spinal cord through the axons in a neural pathway. The brain or the spinal cord read this stimulus, and recognised it as a pain stimulus and passed the reaction to the fingers.
    Pulling out the hand immediately is a reflex action here since the spinal cord immediately processes the signal even before it reaches the brain in order to prevent the finger from further damage due to heat.

     

  • Question 57
    1 / -0

    A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. Name of the non-metal is

    Solution

    A purple coloured non-metal which forms a brown solution in alcohol, which is applied on wounds as an antiseptic, is iodine. It is also known as tincture iodine. It is basically a weak solution of iodine with only 2 to 7% iodine dissolved in a solution of water and ethanol along with potassium or sodium iodide.

     

  • Question 58
    1 / -0

    Given below are the harmful effects of weeds on crop plants. Choose the correct combination of statements.

    (i) They interfere in harvesting.
    (ii) They help crop plants to grow healthy.
    (iii) They compete with crop plants for water, nutrients, space and light.
    (iv) They affect plant growth.

    Solution

    Weeds compete with the main crop for water, nutrients, space and light and as a result, they have an adverse effect on the plant growth. While harvesting, they are harvested along with the crop and are difficult to separate.

     

  • Question 59
    1 / -0

    Which of the following groups contain all synthetic substances?

    Solution

    Nylon is a generic designation for a family of synthetic polymers, based on aliphatic or semi-aromatic polyamides. Nylon is a thermoplastic silky material that can be melt-processed into fibers, films, or shapes. It is made of repeating units linked by amide links similar to the peptide bonds in proteins.
    Terylene fabric is a synthetic polyester fibre which is based on the properties of terephthalic acid.
    Artificial wool is prepared from another type of synthetic fiber called acrylic. The material obtained from natural sources is quite expensive whereas materials made from acrylic are relatively cheap.
    Nylon, Terylene, Acrylic are all synthetic fibres.

     

  • Question 60
    1 / -0

    Which of the following statements is true about endemic species?

    Solution

    Endemic species are those plants and animals that exist only in one geographical region. Species can be endemic to large or small areas of the world. Some may be endemic to the particular continent; some are endemic to a part of a continent, and others to a single island.

     

  • Question 61
    1 / -0

    Identify the correct statement about cells.

    Solution

    1. Not all cells have a nucleus. Cells are of two types: eukaryotic (those with a defined nucleus) and prokaryotic (those with no defined nucleus).

    2. Tissues are groups of similar cells that have a common function. An organ is a structure that is composed of at least two or more tissue types and performs a specific set of functions for the body. Many organs working together to accomplish a common purpose is called an organ system.

    3. Tissue is a group of cells that have similar structure and that function together as a unit. Primary types of body tissues include epithelial, connective, muscular, and nervous tissues.

    4. Cells differ greatly in size, shape and activities. For example, mycoplasmas, the smallest cells, are only 0.3 µm in length, while bacteria could be 3 to 5 µm. The largest isolated single cell is the egg of an ostrich. Among multicellular organisms, human red blood cells are about 7.0 µm in diameter. Nerve cells are some of the longest cells. Cells also vary greatly in their shape. They may be disc-like, polygonal, columnar, cuboid, thread-like, or even irregular. The shape of the cell may vary with the function it performs.

     

  • Question 62
    1 / -0

    Aquatic animals in which fertilisation occurs in water are said to be:

    Solution

    An animal that is viviparous gives birth to developed live young. The embryos are raised with special organs in the parents as they develop which supply nutrients to the growing embryos. Without a large egg, there is no large yolk sac for the embryo to survive on.
    External fertilisation usually occurs in aquatic environments where both eggs and sperm are released into the water. After the sperm reaches the egg, fertilisation can then take place. External fertilisation in an aquatic environment protects the eggs from drying out.

     

  • Question 63
    1 / -0

    The light from sun takes 500 s to reach the earth. Assuming that the speed of light is 3,00,000 kms-1, calculate the distance between the sun and the earth.

    Solution

    Distance = speed x time = 500 x 3,00,000 = 150,000,000 = 150 million km

     

  • Question 64
    1 / -0

    Which of the following is not an application of chemical effect of electric current?

    Solution

    Electroplating is the process of plating one metal onto another by hydrolysis, most commonly for decorative purposes or to prevent corrosion of a metal. There are also specific types of electroplating such as copper plating, silver plating, and chromium plating.
    Some liquids are good conductors of electricity and some are poor conductors. Most liquids that conduct electricity are solutions of acids, bases and salts. The passage of an electric current through a conducting liquid causes chemical reactions. The resulting effects are called chemical effects of currents.

     

  • Question 65
    1 / -0

    An earthquake of magnitude '6' on Richter scale has

    Solution

    An increase of 2 in magnitude means 1000 times more destructive energy. Therefore, an earthquake of magnitude 6 has thousand times more destructive energy than an earthquake of magnitude 4.

     

  • Question 66
    1 / -0

    Which of the following statements is correct regarding rods and cones in the human eye?

    Solution

    Cone cells, or cones, are photoreceptor cells in the retinas of vertebrate eyes (e.g. the human eye). They respond differently to light of different wavelengths, and are thus responsible for colour vision and function best in relatively bright light, as opposed to rod cells, which work better in dim light.
    There are two types of photoreceptors in the retina: rods and cones. The rods are most sensitive to light and dark changes, and contain only one type of light-sensitive pigment. Rods are not good for colour vision. They are responsible for vision at low light levels (scotopic vision). They do not mediate colour vision, and have a low spatial acuity.

     

  • Question 67
    1 / -0

    Suppose a new planet is discovered between Uranus and Neptune. Its time period of revolution around the sun would be

    Solution

    Time period increases with increase in radius. Since the radius of the new planet is more than that of Uranus and less than that of Neptune, its time period would be more than that of Uranus and less than that of Neptune.

     

  • Question 68
    1 / -0

    Ramesh was cooking potato curry on a chulha. To his surprise, he observed that the copper vessel was getting blackened from outside. It may be due to:

    Solution

    The blackening of the cooking vessel is due to deposition of soot (unburnt carbon particles) because of improper combustion of fuel. This happens when oxygen supply is limited.

     

  • Question 69
    1 / -0

    When a Copper vessel is exposed to moist air for long, it acquires a dull green coating. The green material is a mixture of

    Solution

    When a Copper vessel is exposed to moist air for long, it acquires a dull green coating. The green material is a mixture of copper hydroxide oxide and copper carbonate. As the metal reacts with various chemicals and gases present in the atmosphere, it results in the formation of basic copper carbonate which is green in color.
    Cu + O+ H2O + CO→ CuCO3.Cu(OH)2

     

  • Question 70
    1 / -0

    The places meant for conservation of biodiversity in their natural habitat are

    (i) Zoological garden
    (ii) Botanical garden
    (iii) Sanctuary
    (iv) National park

    Solution

    The places meant for conservation of biodiversity in their natural habitat are wildlife sanctuaries and national parks. Wildlife sanctuary, national park are in situ conservation methods of biodiversity. Zoological and botanical gardens are ex situ conservation methods. These places conserve the species outside its natural habitat.

     

  • Question 71
    1 / -0

    The same force 'F' acts on four different objects having the areas given below, one by one. In which case will the pressure exerted be the maximum?

    Solution

    Pressure is maximum where area is minimum.

     

  • Question 72
    1 / -0

    Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the strings suitably. By doing so, he is adjusting:

    Solution

    The sitarist is adjusting the frequency of the sitar string with the frequency of other musical instruments. If it is not done so, the sound will be unpleasant to listen. Every musical note created from any musical instrument works on a specific frequency. And to properly play that instrument, we have to adjust these frequencies accurately. 

     

  • Question 73
    1 / -0

    Rhizobium bacteria:

    Solution

    "Rhizobia" is the group of soil bacteria that infect the roots of legumes to form root nodules. Rhizobia are found in the soil and after infection, produce nodules in the legume where they fix nitrogen gas (N2) from the atmosphere turning it into a more readily useful form of nitrogen. This mutually beneficial relationship is true of all of the rhizobia, of which the genus Rhizobium is a typical example.

     

  • Question 74
    1 / -0

    The element which is stored under water is

    Solution

    Phosphorus is stored in water because it is a very reactive element. It is a non-metal and does not react with water, but reacts vigorously with oxygen and the reaction is highly exothermic. It is a pyrophoric solid, spontaneously combustible in air, which is why it should be stored under water at all times.

     

  • Question 75
    1 / -0

    Poor conductors are:

    Solution

    Polythene or polymers are bad conductors of heat due to the fact that they don't have a proper structure in place, like metals, which are good conductors of heat as well as of electricity, have a proper crystal structure (FCC or BCC), a solid state structure which helps in transfer of energy.

     

  • Question 76
    1 / -0

    Force of friction always acts on moving objects and its direction shall be:

    Solution

    Friction is a force that always acts in a direction opposite to the relative motion or opposite to the tendency of the relative motion.

     

  • Question 77
    1 / -0

    The complainant has a _________ right to get a free copy of the FIR from the Police.

    Solution

    The complainant has legal right to get a copy of the FIR registered against him.
    Under Indian criminal law, the informant is entitled to get a copy of the first information report lodged by him at the police station free of cost. It is a necessary document in a criminal case and can majorly support the case of the informant or the victim. However, the accused person is also entitled to get a copy of the first information report. Sec. 207 of the Code of Criminal Procedure, 1973 entitles the accused to get the copy of the first information report after the investigation has been completed by the police in the said case, and the charge sheet has been filed in the Court. The provision states that the Magistrate, in such circumstances, must furnish to the accused a copy of the FIR free of cost.

     

  • Question 78
    1 / -0

    Which article of the constitution states that untouchability has been abolished?

    Solution

    Article 17 of the constitution abolishes the practice of untouchability. To make untouchability law further strong, parliament passed untouchability (offences) Act in 1955, which came into force on 1st June, 1955. Untouchability has been abolished and its practice in any form is forbidden. The enforcement of any disability arising out of untouchability shall be an offence punishable in accordance with law.

     

  • Question 79
    1 / -0

    The Marathi newspaper Kesari was edited by:

    Solution

    Kesari is a Marathi newspaper which was founded in 1881 by Lokmanya Bal Gangadhar Tilak, a prominent leader of the Indian Independence movement. The Marathi newspaper Kesari was edited by Bal Gangadhar Tilak. The newspaper was used as a spokes-piece for the Indian national freedom movement, and continues to be published by the Kesari Maratha Trust and Tilak's descendants.

     

  • Question 80
    1 / -0

    The difference between the birth rate and the death rate is called the:

    Solution

    Births and deaths are natural causes of population change. The difference between the birth rate and the death rate of a country or place is called the natural growth rate. The natural increase is calculated by subtracting the death rate from the birth rate and the natural decrease is calculated by subtracting the birth rate from the death rate in the country or place.

     

  • Question 81
    1 / -0

    Dandi March was against the:

    Solution

    The Salt March, also known as the Salt Satyagraha, Dandi March and the Dandi Satyagraha, was an act of nonviolent civil disobedience in colonial India led by Mohandas Karamchand Gandhi. The 24-day march lasted from 12 March 1930 to 6 April 1930 as a direct action campaign of tax resistance and non-violent protest against the British salt tax. Mahatma Gandhi started this march with 80 of his trusted volunteers.

     

  • Question 82
    1 / -0

    The British East India Company got a charter from Queen Elizabeth-I in

    Solution

    British Royal Charter was granted to the English East India Company on Dec 31, 1600 AD. Queen Elizabeth I of England granted a formal charter to the London merchants trading to the East Indies, hoping to break the Dutch monopoly of the spice trade. Queen was herself a share holder in the East India Company.

     

  • Question 83
    1 / -0

    Delhi Renaissance refers to the period from

    Solution

    Period from 1830 to 1857 is considered the period of Delhi renaissance. During this period, rebirth of art and learning, revival of creativity and artistic attitude took place. Contribution in science and humanity, establishment of Delhi college, railway and the expansion of the city were done during this period.

     

  • Question 84
    1 / -0

    Woods Dispatch of 1854 refers to

    Solution

    Charles Wood, in 1854 sent the Wood's despatch to the Governor General Lord Dalhousie, which was referred to as Educational Reform. In accordance with Wood's despatch, Education Departments were established in every province and universities were opened at Calcutta, Bombay and Madras in 1857 on the model of the London University. Later more universities were opened in Punjab in 1882 and at Allahabad 1887.
    The main objective of the Wood's Despatch was to educate Indian people in order to create a class of civil servants. It also wanted to impart Western knowledge and information about Western Culture to the Indian people.

     

  • Question 85
    1 / -0

    The leader of the ruling party in Lok Sabha is

    Solution

    The Lok Sabha or House of the People is the lower house of India's bicameral Parliament, with the upper house being the Rajya Sabha. Members of the Lok Sabha are elected by adult universal suffrage. The leader of the ruling party in Lok Sabha is Prime Minister.

     

  • Question 86
    1 / -0

    As per which article of the Indian Constitution every arrested person is guaranteed Fundamental Rights?

    Solution

    Article 22(2) of the constitution provides that no person who is arrested shall be detained in custody without being informed as soon as may be, of the grounds of such arrest nor shall he be denied the right to consult, and to be defended by a legal practitioner of his choice.

     

  • Question 87
    1 / -0

    Which of the following gases was released in Bhopal Gas Tragedy?

    Solution

    The Bhopal gas disaster happened because water entered a tank containing Methyl isocyanate. This caused a chemical reaction which resulted in the buildup of too much carbon dioxide, among other things. The resulting reaction increased the temperature inside the tank to reach over 200 °C (392 °F). It is considered to be the world's worst industrial disaster.

     

  • Question 88
    1 / -0

    Which one of the following is a leading producer of Copper in the world?

    Solution

    The top producers of copper are found throughout the world. The number one producer is Chile, a South American country. Chile produces 57,50,000 tonnes of copper annually. The country attracted foreign private investments in the 90's when the government passed a mining law. Chile is followed by Peru, China, and the United States.

     

  • Question 89
    1 / -0

    Identify the state with ''Lowest literacy'' as per census 2011.

    Solution

    India's literacy rate is at 74.04%. Bihar is the least literate state in India, with a literacy of 63.82% and Kerala is the most literate state in India, with 93.91% literacy.

     

  • Question 90
    1 / -0

    The total number of Anglo Indians nominated to the Loksabha is

    Solution

    The Lok Sabha at present consists of 545 members. Of these, 530 members are directly elected from the States and 13 from Union Territories, while two are nominated by the President to represent the Anglo-Indian community.

     

  • Question 91
    1 / -0

    Which one of the following countries has the smallest percentage of forest land?

    Solution

    Australia has a total of 134 million hectares of forest, which is equivalent to 17% of Australia's land area.
    In India, the total forest and tree cover is 8,02,088 square km, which is 24.39 percent of the geographical area of the country.
    France has 17 million hectares of forest cover which represents 31% of the country.
    Japan is a land of forests and mountains. About 25 million hectares are forested, covering some 67 percent of the country.

     

  • Question 92
    1 / -0

    Who was the founder of the 'Brahmo Sabha'?

    Solution

    On August 20, 1828 the first assembly of the Brahmo Sabha was held at Kolkata (Calcutta), India. The founder of this sabha was the religious reformer Raja Ram Mohan Roy who convened this sabha for his family and friends settled there. These were essentially informal meetings of Bengali Brahmins, open to all Brahmins, and there was no formal organisation or theology as such.

     

  • Question 93
    1 / -0

    Child Marriage Restraint Act was passed in the year _________

    Solution

    The Child Marriage Restraint Act, 1929, passed on 28 September 1929, in the Imperial Legislative Council of India, fixed the age of marriage for girls at 16 years and boys at 18 years which was later amended to 18 for girls and 21 for boys. It is popularly known as the Sarda Act, after its sponsor Harbilas Sarda.

     

  • Question 94
    1 / -0

    What is a population pyramid?

    Solution

    Population pyramid is a graphical presentation of the age, sex composition of a population and is also called an "age-sex-pyramid". It is a graphical illustration that shows the distribution of various age groups in a population (typically that of a country or region of the world), which forms the shape of a pyramid when the population is growing.

     

  • Question 95
    1 / -0

    Which age group of India is guaranteed free education by the Constitution?

    Solution

    The Constitution (Eighty-sixth Amendment) Act, 2002 inserted Article 21-A in the Constitution of India to provide free and compulsory education of all children in the age group of six to fourteen years as a Fundamental Right in such a manner as the State may, by law, determine.

     

  • Question 96
    1 / -0

    Who wrote the book 'Poverty and Un-British Rule in India'?

    Solution

    The author of the book 'Poverty and Un-British Rule in India' is Dadabhai Naoroji, who devoted his entire life to the cause of India's upliftment and independence was a social reformer, a member of the British Parliament and founder of the Indian National Congress.

     

  • Question 97
    1 / -0

    The Chairman of the Drafting Committee of Indian Constitution was:

    Solution

    Dr. Bhimrao Ramji Ambedkar, Chairman of the Drafting Committee, presented the final draft of the Indian Constitution to Dr Rajendra Prasad on 25 November 1949. Jawaharlal Nehru addressed the constituent assembly in 1946.

     

  • Question 98
    1 / -0

    By the late 18th Century, East India Company was trying to expand the cultivation of:

    Solution

    With the Nawabs of Bengal under British power, indigo planting became more and more commercially profitable because of the demand for blue dye in Europe. It was introduced in large parts of Burdwan, Bankura, Birbhum, North 24 Parganas, and Jessore (present Bangladesh).

     

  • Question 99
    1 / -0

    EVMs were used for the first time in the __________ general elections.

    Solution

    The EVMs were first time used on an experimental basis in selected constituencies of Rajasthan, Madhya Pradesh and Delhi. The use of EVMs and electronic voting was developed and tested by the state-owned Electronics Corporation of India and Bharat Electronics in the 1990s. They were introduced in Indian elections in 2001. The electronic voting machines have been used in all general and state assembly elections of India since 2001.

     

  • Question 100
    1 / -0

    There are _________ elected members in Rajya Sabha.

    Solution

    Rajya Sabha currently has a maximum membership of 245, of which 233 are elected by the legislatures of the states and union territories using single transferable votes through Open Ballot while the President can appoint 12 members for their contributions to art, literature, science, and social services.

     

  • Question 101
    1 / -0

    Minerals that lie at shallow depths are taken out by removing the surface layer, this is known as:-

    Solution

    Minerals that lie at shallow depths are taken out by removing the surface layer; this is known as open-cast mining. Deep bores, called shafts, have to be made to reach mineral deposits that lie at great depths. This is called shaft mining. Petroleum and natural gas occur far below the earth's surface.

     

  • Question 102
    1 / -0

    Which number completes the second pair in the same way as the first pair?

    20 : 11 : : 102 : ?

    Solution

    The pattern is as follows:
    20 ÷ 2 + 1 = 10 + 1
    Similarly,
    102 ÷ 2 + 1 = 51 + 1 = 52

     

  • Question 103
    1 / -0

    Which number completes the second pair in the same way as the first pair?

    13 : 25 : : 48 : ?

    Solution

    This pattern is as follows:
    13 × 2 – 1 = 26 – 1 = 25
    Thus, 48 × 2 – 1 = 96 – 1 = 95.

     

  • Question 104
    1 / -0

    Tiff is to Battle as Frugal is to

    Solution

    It is clear that, if Tiff is to battle then Frugal is to Miserly.
    This term will come after Frugal because it is of higher intensity.

     

  • Question 105
    1 / -0

    If ENGLAND is written as 1234526 and FRANCE is written as 785291. How is GREECE coded?

    Solution

    Given: ENGLAND is coded as 1234526 and FRANCE is coded as 785291.
    Thus, it is clear that E = 1, N = 2, G = 3, L = 4, A = 5, D = 6, F = 7, R = 8, C = 9.
    ⇒ GREECE will be coded as 381191.

     

  • Question 106
    1 / -0

    Which word can't be formed by using the letters of the INTELLIGENCE word?

    Find that word.

    Solution

    It is clear that TILLAGE cannot be formed by using given word INTELLIGENCE because letter "A" is missing in the given word.

     

  • Question 107
    1 / -0

    If + means divide, divide means -, - means ×, × means + then 12 + 6 / 3 - 2 × 8 = ?

    Solution

    Given: 12 + 6/3 - 2 x 8 =
    According to given question:
    12/6 - 3 x 2 + 8
    Thus, using BODMAS we get,
    2 - 6 + 8
    ⇒ 4

     

  • Question 108
    1 / -0

    A Cube painted blue on all the faces is cut into 125 cubes of equal size. Then, how many cubes are not painted on any face?

    Solution

    As we know that, a cube painted blue is divided into 125 pieces, i.e, 4 cuts were made on each surface
    i.e we will get 5 × 5 pieces on each surface by making 4 cuts each.
    The cubes which are not painted on any face = (n - 2)3
    = (5 – 2)3 (n = the number of smaller cubes on each side)
    = (3)3
    = 27

     

  • Question 109
    1 / -0

    If 1st October is Sunday, then 1st November will be

    Solution

    According to given instruction, it is clear that 1st, 8th, 15th, 22nd, and 29th October are Sundays.
    So, 31st October is Tuesday.
    ∴ 1st November will be Wednesday.

     

  • Question 110
    1 / -0

    Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

    ac_cab_baca_aba_aca_

    Solution

    The given pattern is,
    acacabab acacabab acacabab
    The pattern acacabab is repeated.
    Thus, missing letters are aacbc.

     

  • Question 111
    1 / -0

    In the following question, find the word which cannot be made from the letters of the given word without repeating any letter.

    REPUBLICAN

    Solution

    It is clear that ANKLE cannot be formed by using the letters of REPUBLICAN because letter "K" is missing in REPUBLICAN.

     

  • Question 112
    1 / -0

    In the following question, find the word which cannot be made from the letters of the given word.

    ESTRANGE

    Solution

    It is clear that GENERATE cannot be formed by using the letters of ESTRANGE because letter "E" is used only twice in ESTRANGE.
    While in GENERATE, letter E is used thrice.

     

  • Question 113
    1 / -0

    In the following question, find the word which cannot be made from the letters of the given word.

    ADMINISTRATOR

    Solution

    It is clear that NEST cannot be formed by using the letters of ADMINISTRATOR because letter "E" is missing in ADMINISTRATOR.

     

  • Question 114
    1 / -0

    In the following question, find the word which cannot be made from the letters of the given word.

    SOCIALISATION

    Solution

    It is clear that SCOUT cannot be formed by using the letters of SOCIALISATION because letter "U" is missing in SOCIALISATION.

     

  • Question 115
    1 / -0

    Choose the letter group that best represents a relationship similar to the one expressed in the original pair of letter groups:

    If LONDON is coded as MPOEPO. What code is needed for DELHI?

    Solution

    It is clear that each letter is coded by one letter increased by the given letter.
    ⇒ L (12) + 1 = M (13)
    O (15) + 1 = P (16)
    N (14) + 1 = O (15)
    D (4) + 1 = E (5)
    O (15) + 1 = P (16)
    N (14) + 1 = O (15)
    Thus, similarly, DELHI will be coded as EFMIJ.
    D (4) + 1 = E (5)
    E (5) + 1 = F (6)
    L (12) + 1 = M (13)
    H (8) + 1 = I (9)
    I (9) + 1 = J (10)

     

  • Question 116
    1 / -0

    Choose the letter group that best represents a relationship similar to the one expressed in the original pair of letter groups:

    PNS : OOT : : DSH : ?

    Solution

    The above pattern is as follows:
    P (16) - 1 = O (15)
    N (14) + 1 = O (15)
    S (19) + 1 = T (20)

    Thus, similar pattern is followed:
    D (4) - 1 = C (3)
    S (19) + 1 = T (20)
    H (8) + 1 = I (9)
    Thus, DSH is coded as CTI.

     

  • Question 117
    1 / -0

    In the given series, find the next/missing term/number.

    MNOABCPQRDEFST??

    Solution

    The given series is as follows according to their alphabetical order:
    13, 14, 15, 1, 2, 3, 16, 17, 18, 4, 5, 6 19, 20, 21 7, 8, 9
    Thus, the series will be
    MNO ABC PQR DEF STU GHI
    Thus, missing letters are UG.

     

  • Question 118
    1 / -0

    In the given series, find the next/missing term/number.

    YX, UTS, ONML, ?

    Solution

    In the given series, two letters (i.e. W, V) are skipped between X and U.
    Similarly, three letters (i.e. P, Q, R) are skipped between S and O.
    Now, to get the next term four letters (i.e. H, I, J, K) will be skipped.
    So, next term in the series is GFEDC.

     

  • Question 119
    1 / -0

    Choose the letter group that best represents a relationship similar to the one expressed in the original pair of letter group:

    MONKEY : XDJMNL : : TIGER : ?

    Solution

    If we reverse MONKEY we get YEKNOM and if we replace these letters with their previous letters we get XDJMNL
    In the same way if we reverse TIGER we get REGIT and again if we replace the previous letters we get QDFHS.

     

  • Question 120
    1 / -0

    Choose the letter group that best represents a relationship similar to the one expressed in the original pair of letter group:

    MAD is to JXA as RUN is to

    Solution

    The above letters are coded as 3 places decreased by its original position.
    ⇒ M (13) - 3 = J (10)
    A (1) - 3 = X (24)
    D (4) - 3 = A (1)
    Thus, RUN will be coded as ORK.
    R (18) - 3 = O (15)
    U (21) - 3 = R (18)
    N (14) - 3 = K (11)

     

  • Question 121
    1 / -0

    Choose the letter group that best represents a relationship similar to the one expressed in the original pair of letter group:

    Kilometer is to Distance as Poundal is to

    Solution

    As we know that, kilometre is a unit of distance.
    Similarly, Poundal is a unit of force.

     

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