general science

Chemistry MCQ Questions and Answers page - 9

1.

Hydrogen bomb is based on the principle of

Answer/ Hint      

Answer : D

Explanation :

2.

Which of the following can be to absorb neutrons to control the chain reaction during nuclear fission  ?

Answer/ Hint      

Answer : A

Explanation :

3.

The least preferred technique in the disposal of Municipal Solid Waste is

Answer/ Hint      

Answer : D

Explanation :

4.

If water smells bad, then that odour can be removed by adding

Answer/ Hint      

Answer : C

Explanation :

5.

The working of a dry cell is based on

Answer/ Hint      

Answer : D

Explanation :

6.

Which of the following is a characteristic of an exothermic reaction  ?

Answer/ Hint      

Answer : A

Explanation :

7.

What is an endothermic reaction  ?

Answer/ Hint      

Answer : B

Explanation :

8.

The passage of an electric current through a conducting liquid causes  _____________ .

Answer/ Hint      

Answer : D

Explanation :

9.

Among the following respiration is which type of process  ?

Answer/ Hint      

Answer : A

Explanation :

10.

Which of the following reaction is an example of Exothermic reaction  ?

Answer/ Hint      

Answer : D

Explanation :

11.

In which type of chemical reaction a single product is formed from two or more reactants  ?

Answer/ Hint      

Answer : A

Explanation :

12.

What is the name of that technique, which uses radioactivity to decide the period of materials of pre-historic period  ?

Answer/ Hint      

Answer : C

Explanation :

13.

An atomic pile is used for

Answer/ Hint      

Answer : B

Explanation :

14.

The radioactive element used in heart pace makers is

Answer/ Hint      

Answer : A

Explanation :

15.

The element which is commonly used in nuclear for producing electricity by nuclear reactors fission is

Answer/ Hint      

Answer : C

Explanation :

16.

Who developed Hydrogen Bomb  ?

Answer/ Hint      

Answer : C

Explanation :

17.

The long range potential of nuclear energy in India depends on its reserves of

Answer/ Hint      

Answer : A

Explanation :

18.

Which of the following elements is non-radioactive  ?

Answer/ Hint      

Answer : D

Explanation :

19.

Radioactive disintegration of uranium ultimately results in formation of

Answer/ Hint      

Answer : D

Explanation :

20.

Which one of the following is radioactive  ?

Answer/ Hint      

Answer : D

Explanation :

21.

In nuclear reactors, graphite is used as  a/an

Answer/ Hint      

Answer : C

Explanation :

22.

The fuel used in an atomic reactor is

Answer/ Hint      

Answer : D

Explanation :

23.

Which of the following is  not  a radioactive element  ?

Answer/ Hint      

Answer : D

Explanation :

24.

Nuclear energy is a mineral-based energy source. It is derived from 

Answer/ Hint      

Answer : A

Explanation :

25.

When ice cubes are made, the entropy of water

Answer/ Hint      

Answer : B

Explanation :

26.

Removal of carbon particles from air involves the principle of

Answer/ Hint      

Answer : C

Explanation :

27.

Particulates (<1 μm size) remaining suspended in air indefinitely and transported by wind currents are called

Answer/ Hint      

Answer : C

Explanation :

28.

Name the particle that is most essential to continue the chain reaction during the fission of uranium

Answer/ Hint      

Answer : C

Explanation :

29.

Conversion of chemical energy into electrical energy occurs in

Answer/ Hint      

Answer : C

Explanation :

30.

The fuel that is used in modern submarines is

Answer/ Hint      

Answer : A

Explanation :

31.

The energy of the sun is mainly due to

Answer/ Hint      

Answer : D

Explanation :

32.

In a nuclear reactor the material use for absorbing neutrons is

Answer/ Hint      

Answer : D

Explanation :

33.

The lightest radioactive element is

Answer/ Hint      

Answer : C

Explanation :

34.

Radioactive elements emit  :

Answer : D

Explanation :

35.

Which of the following has the highest penetrating power  ?

Answer/ Hint      

Answer : C

Explanation :

36.

The moderator used in a nuclear reactor is

Answer/ Hint      

Answer : C

Explanation :

37.

Which of the following elements does not exhibit natural radioactivity  ?

Answer/ Hint      

Answer : C

Explanation :

38.

The most suitable unit for expressing nuclear radius is  :

Answer/ Hint      

Answer : C

Explanation :

39.

Chernobyl disaster is the result of pollution by

Answer/ Hint      

Answer : D

Explanation :

40.

Which of the following caused radioactive pollution along the coast of Kerala  ?

Answer/ Hint      

Answer : C

Explanation :

41.

The antiparticle of an electron is

Answer/ Hint      

Answer : A

Explanation :

42.

Which of the following is used as control rods in Atomic reactor  ?

Answer/ Hint      

Answer : D

Explanation :

43.

Which of the following is used for the preparation of dynamite  ?

Answer/ Hint      

Answer : C

Explanation :

44.

Which of the following is radioactive in nature  ?

Answer/ Hint      

Answer : C

Explanation :

45.

Which of the following is used as fuel rods in Atomic reactor  ?

Answer/ Hint      

Answer : B

Explanation :

46.

A radioactive substance has a half life of six months. Three-fourth of the substance will decay in  _____________ .

Answer/ Hint      

Answer : C

Explanation :

47.

Which of the following is used as coolant in Atomic reactor  ?

Answer/ Hint      

Answer : A

Explanation :

48.

Which of the following particles were made to fall on a thin gold foil by Ernest Rutherford  ?

Answer/ Hint      

Answer : D

Explanation :

49.

Which gas is used as a fuel in a rocket  ?

Answer/ Hint      

Answer : B

Explanation :

50.

Which among the following is a carbohydrate  ?

Answer/ Hint      

Answer : B

Explanation :

51.

The gas used for artificial fruit ripening of green fruit is –

Answer/ Hint      

Answer : A

Explanation :

52.

The enzyme that converts glucose to ethyl alcohol is  :

Answer/ Hint      

Answer : C

Explanation :

53.

Silk fibre chemically is  :

Answer/ Hint      

Answer : C

Explanation :

54.

Fermentation of milk to curd is due to  :

Answer/ Hint      

Answer : C

Explanation :

55.

By which organic compound all the oils are known  ?

Answer/ Hint      

Answer : C

Explanation :

56.

Milk tastes sour when kept in the open for sometime due to the formation of

Answer/ Hint      

Answer : A

Explanation :

57.

The natural source of hydrocarbon is

Answer/ Hint      

Answer : A

Explanation :

58.

Which of the following is chiefly present in  LPG  (Liquefied Petroleum Gas)  ?

Answer/ Hint      

Answer : D

Explanation :

59.

Saccharin is made up of

Answer/ Hint      

Answer : A

Explanation :

60.

PVC is obtained by the polymerisation of

Answer/ Hint      

Answer : B

Explanation :

61.

Which of the following vegetable oils does not contain essential fatty acids  ?

Answer/ Hint      

Answer : A

Explanation :

62.

Which of the following fibres catches fire least  ?

Answer/ Hint      

Answer : B

Explanation :

63.

The polymerisation of Which of the following is used in manufacturing of polythene in industry  ?

Answer/ Hint      

Answer : D

Explanation :

64.

Aspirin is

Answer/ Hint      

Answer : C

Explanation :

65.

Which of the following is the petroleum wax  ?

Answer/ Hint      

Answer : C

Explanation :

66.

A polymeric substance used to make parachute is

Answer/ Hint      

Answer : B

Explanation :

67.

‘Milk Sugar’  is

Answer/ Hint      

Answer : A

Explanation :

68.

Petroleum is a mixture of

Answer/ Hint      

Answer : B

Explanation :

69.

Which one of the following organic compounds has fruity smell  ?

Answer/ Hint      

Answer : C

Explanation :

70.

Polythene is polymer of

Answer/ Hint      

Answer : A

Explanation :

71.

When formaldehyde and potassium hydroxide are heated, we get

Answer/ Hint      

Answer : B

Explanation :

72.

The polymer used in making plastic crockery is

Answer/ Hint      

Answer : D

Explanation :

73.

Vulcanization of rubber is carried out by adding

Answer/ Hint      

Answer : A

Explanation :

74.

Preparation of  ‘Dalda or Vanaspati’  ghee from vegetable oil utilizes the following process  :

Answer/ Hint      

Answer : C

Explanation :

75.

Denatured spirit is ethanol mixed with

Answer/ Hint      

Answer : D

Explanation :

76.

The compound to which  H2  does not add is

Answer/ Hint      

Answer : B

Explanation :

77.

Candle is a mixture of

Answer/ Hint      

Answer : A

Explanation :

78.

Ethanol containing  5%  water is known as

Answer/ Hint      

Answer : A

Explanation :

79.

Litmus is obtained from

Answer/ Hint      

Answer : D

Explanation :

80.

Vinegar made by fermentation from cane sugar contains

Answer/ Hint      

Answer : D

Explanation :

81.

Tetra ethyl lead (TEL)  is

Answer/ Hint      

Answer : D

Explanation :

82.

Cokking gas is a mixture of

Answer/ Hint      

Answer : C

Explanation :

83.

Glycol is added to aviation gasoline because it

Answer/ Hint      

Answer : C

Explanation :

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