General Science - MCQ Online Test (1)


25 Questions MCQ Test General Science(Prelims) by IRS Divey Sethi | General Science - MCQ Online Test (1)


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This mock test of General Science - MCQ Online Test (1) for UPSC helps you for every UPSC entrance exam. This contains 25 Multiple Choice Questions for UPSC General Science - MCQ Online Test (1) (mcq) to study with solutions a complete question bank. The solved questions answers in this General Science - MCQ Online Test (1) quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this General Science - MCQ Online Test (1) exercise for a better result in the exam. You can find other General Science - MCQ Online Test (1) extra questions, long questions & short questions for UPSC on EduRev as well by searching above.
QUESTION: 1

 The deficiency of which of the following leads to dental caries ? 

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QUESTION: 2

Carotene in Indian cow's milk causes?

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QUESTION: 3

Plants that grow in saline water are known as :

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QUESTION: 4

In the context of genetic code, consider the following statements:

A.    Although an amino acid may have two or more codons, each codon specifies only one amino acid.

B.    Amino acid codons are identical in human beings, tobacco plants and viruses.

Which of the statements given above is/are correct?

Solution:
QUESTION: 5

 In protein synthesis in E. coli. When each amino acid is attached to a specific to RNA at the expense of ATP energy, the ion of which one of the following elements is used?

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QUESTION: 6

Sodium vapour lamps are preferred over incandescent lamp because of

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QUESTION: 7

In an ordinary dry cell, the electrolyte is

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QUESTION: 8

Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers etc. ?

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QUESTION: 9

The mixed oxide fuel is used for which of the following?

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QUESTION: 10

 Acid rain is caused by the pollution of environment by 

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QUESTION: 11

The clouds float in the atmosphere because of their

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QUESTION: 12

End product in fermentation is

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QUESTION: 13

Chemical that is used in photography

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QUESTION: 14

 Which gas is used in domestic refrigerators?

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QUESTION: 15

Match sticks are made of

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QUESTION: 16

  When a particle or a body moves with a uniform speed v on a circular path of radius r, then it is acted upon by a force mv2/r which is always directed 

Solution:

Ans: a

Explanation: When a particle or a body moves with a uniform speed v on a circular path of radius r, then it is acted upon by a force mv2/r which is always directed towards the centre of the circle. This force is called centripetal force

QUESTION: 17

 The value of escape velocity depends upon 

Solution:

Ans: b

Explanation: The value of escape velocity does not depend upon the mass of the projected body; instead it depends on the mass and radius of the planet from which it is being projected. The value of escape velocity does not depend on the angle and direction of projection

QUESTION: 18

Consider the following about Fuse Wire and choose the incorrect statement:

  1. It is a thin wire having low resistance.
  2. It is used in a circuit to control the minimum current flowing in a circuit.

It is made up of a material with high melting point

Solution:

Ans: d

Explantion: Fuse Wire is used in a circuit to control the maximum current flowing in a circuit. It is a thin wire having high resistance and is made up of a material with low melting point.

QUESTION: 19

When a lawn roller is pulled by applying a force along the handle at an acute angle, work done by the applied force is 

Solution:

Ans: c

Explanation: When a lawn roller is pulled by applying a force along the handle at an acute angle, work done by applied force is (+) ve.

QUESTION: 20

Which mirrors are commonly used as rear-view (wing) mirrors in vehicles:

Solution:

Ans: b

Explanation: Convex mirrors are commonly used as rear-view (wing) mirrors in vehicles. These mirrors are fitted on the sides of the vehicle, enabling the driver to see traffic behind him/her to facilitate safe driving. Convex mirrors are preferred because they always give an erect, though diminished, image. Also, they have a wider field of view as they are curved outwards. Thus, convex mirrors enable the driver to view much large area than would be possible with a plane mirror.

QUESTION: 21

 An air bubble in water behaves as a 

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QUESTION: 22

Consider the following statements:

  1. If the lens is immersed in a medium having refractive index equal to that of the lens, then it behaves as a concave lens.
  2. If the lens is immersed in a medium having refractive index equal to that of the lens, then it becomes invisible.
  3. If the lens is immersed in a medium having refractive index equal to that of the lens, then its focal length becomes half.

Choose the correct option:

Solution:

Ans: b

Explanation: If the lens is immersed in a medium having refractive index equal to that of the lens, then

The lens becomes invisible.

The lens behaves as a plane glass plate.

The focal length becomes infinite.

QUESTION: 23

What is true about Sound waves?

Solution:

Ans: a

Explanation: Sound travels in the form of waves. Sound waves are longitudinal waves. Thus, they do not exhibit polarisation.

QUESTION: 24

Which among the following is true?

Solution:

Ans: b

Explanation: Amplitude – the maximum displacement on one side of mean position of a particle of medium, is called the amplitude of the wave.

Time period -the time taken by a particle of the medium to complete its one vibration in called the time period of the wave.

Frequency -the number of vibrations made by a particle is called the frequency of the wave.

Wave velocity - the distance travelled by a wave in one second is travelled by a wave in one second is called wave velocity.

Wavelength - the distance travelled by a wave in one time period of a medium is called its wavelength.

QUESTION: 25

Tension in the string of simple pendulum is 

Solution:

Ans: b

Explanation: Tension in the string of simple pendulum is always perpendicular to the displacement of the bob, hence it is zero.