general science

Chemistry MCQ Questions and Answers page - 4

1.

Asbestos is formed of :

Answer/ Hint      

Answer : A

Explanation :

2.

Which one of the following is known as the ‘brown coal’ ?

Answer/ Hint      

Answer : D

Explanation :

3.

One carat of diamond is equal to

Answer/ Hint      

Answer : C

Explanation :

4.

Nitrogen forms a variety of compounds in all oxidation states ranging from

Answer/ Hint      

Answer : A

Explanation :

5.

Charcoal is used in water treatment as a/an

Answer/ Hint      

Answer : D

Explanation :

6.

An element that does not occur in nature but can be produced artificially is

Answer/ Hint      

Answer : C

Explanation :

7.

The manufacture of iron from iron ore involves the process of

Answer/ Hint      

Answer : B

Explanation :

8.

Which one of the following is caused by the higher concentration of Nitrogen and Phosphorous ?

Answer/ Hint      

Answer : A

Explanation :

9.

The main source of carbon monoxide is

Answer/ Hint      

Answer : C

Explanation :

10.

Electric fuse is an alloy of

Answer/ Hint      

Answer : A

Explanation :

11.

Which among the following is liquid non-metal ?

Answer/ Hint      

Answer : B

Explanation :

12.

In silver paints, the main constituent present is

Answer/ Hint      

Answer : A

Explanation :

13.

Which one of the following is colour – less ?

Answer/ Hint      

Answer : B

Explanation :

14.

Which one out of the following helps in burning ?

Answer/ Hint      

Answer : A

Explanation :

15.

Silicon is a

Answer/ Hint      

Answer : A

Explanation :

16.

The percentage of oxygen in air is approximately 

Answer/ Hint      

Answer : D

Explanation :

17.

Element 106 was discovered by

Answer/ Hint      

Answer : B

Explanation :

18.

Which one of the following metals is used in Space Crafts to withstand high temperatures ?

Answer/ Hint      

Answer : B

Explanation :

19.

Brass gets discoloured in air due to constant exposure in presence of :

Answer/ Hint      

Answer : B

Explanation :

20.

Nitrogen is an essential constituent of all :

Answer/ Hint      

Answer : B

Explanation :

21.

The percentage of nitrogen present in ammonium sulphate is :

Answer/ Hint      

Answer : A

Explanation :

22.

Which metal is the heaviest in periodic table among the following ?

Answer/ Hint      

Answer : A

Explanation :

23.

The important metal used with iron to produce stainless steel is

Answer/ Hint      

Answer : B

Explanation :

24.

The name of unreactive gas is

Answer/ Hint      

Answer : C

Explanation :

25.

Which one of the following metals can deposit copper from copper sulphate solution ?

Answer/ Hint      

Answer : C

Explanation :

26.

When Arsenic atoms are added to Germanium lattice, it becomes a/an

Answer/ Hint      

Answer : D

Explanation :

27.

Which among the following is used to dilute oxygen the gas cylinders used by divers ?

Answer/ Hint      

Answer : C

Explanation :

28.

The non – metal found in the liquid state is

Answer/ Hint      

Answer : A

Explanation :

29.

The gas used to extinguish fire is

Answer/ Hint      

Answer : D

Explanation :

30.

The gas causing acid rain in an industrial area is

Answer/ Hint      

Answer : C

Explanation :

31.

The highest volume of gases in lower atmosphere is comprised of

Answer/ Hint      

Answer : D

Explanation :

32.

The percentage of carbon in cast iron is :

Answer/ Hint      

Answer : D

Explanation :

33.

Iron rusts quickly in

Answer/ Hint      

Answer : B

Explanation :

34.

Aerated water contains

Answer/ Hint      

Answer : D

Explanation :

35.

Magnetite is

Answer/ Hint      

Answer : B

Explanation :

36.

In an oxygen molecule, two atoms are united by

Answer/ Hint      

Answer : B

Explanation :

37.

White phosphorus is generally kept under

Answer/ Hint      

Answer : B

Explanation :

38.

The wire of flash bulbs is made up of

Answer/ Hint      

Answer : A

Explanation :

39.

The major use of sulphur is in the manufacture of

Answer/ Hint      

Answer : A

Explanation :

40.

Which one of the following elements exhibits the greatest tendency to lose electrons ?

Answer/ Hint      

Answer : B

Explanation :

41.

The element absorbed both in cation and anion form is

Answer/ Hint      

Answer : B

Explanation :

42.

Which of the following is not a greenhouse gas ?

Answer/ Hint      

Answer : B

Explanation :

43.

The metal used for making aircrafts and rockets is

Answer/ Hint      

Answer : C

Explanation :

44.

Which of the following is not a noble gas ?

Answer/ Hint      

Answer : A

Explanation :

45.

Which of the following is very reactive and kept in kerosene ?

Answer/ Hint      

Answer : A

Explanation :

46.

Which of the following is a metallic ore ?

Answer/ Hint      

Answer : D

Explanation :

47.

The inert gas used as beacon light is

Answer/ Hint      

Answer : D

Explanation :

48.

Which one of the following mineral does not contain oxygen ?

Answer/ Hint      

Answer : C

Explanation :

49.

A non – electronic conductor is

Answer/ Hint      

Answer : Select Correct Ans

Explanation :

50.

Which of the following will replace hydrogen from acids to form salts ?

Answer/ Hint      

Answer : B

Explanation :

51.

Which of the following metals has least melting point ?

Answer/ Hint      

Answer : C

Explanation :

52.

Carborundum is another name of

Answer/ Hint      

Answer : A

Explanation :

53.

Which is the purest commercial form of iron ?

Answer/ Hint      

Answer : D

Explanation :

54.

Which one of the following contains maximum percentage of carbon ?

Answer/ Hint      

Answer : A

Explanation :

55.

Which one of the following elements is an example of noble gas ?

Answer/ Hint      

Answer : D

Explanation :

56.

The most abundant element is

Answer/ Hint      

Answer : C

Explanation :

57.

Nitrogen in water is commonly found in the form of

Answer/ Hint      

Answer : B

Explanation :

58.

Which element behaves chemically both as metal and non-metal ?

Answer/ Hint      

Answer : B

Explanation :

59.

The amount of oxygen in the atmosphere remains relatively constant because it is given off by

Answer/ Hint      

Answer : D

Explanation :

60.

Which of the following elements is obtained from sea weeds ?

Answer/ Hint      

Answer : A

Explanation :

61.

Heavy metals got their name because compared to other atoms they have

Answer/ Hint      

Answer : B

Explanation :

62.

Ultra purification of a metal is done by :

Answer/ Hint      

Answer : B

Explanation :

63.

The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clocks is :

Answer/ Hint      

Answer : B

Explanation :

64.

Catalytic converters are generally made from :

Answer/ Hint      

Answer : C

Explanation :

65.

Which one of the following is not coal variety ?

Answer/ Hint      

Answer : C

Explanation :

66.

Air is said to be saturated when :

Answer/ Hint      

Answer : A

Explanation :

67.

The most abundant element by number in the living system is :

Answer/ Hint      

Answer : B

Explanation :

68.

The “King of Metals” is  :

Answer/ Hint      

Answer : A

Explanation :

69.

The gas dissolved in water that makes it basic is :

Answer/ Hint      

Answer : A

Explanation :

70.

Which of the following is not a gaseous air pollutant ?

Answer/ Hint      

Answer : B

Explanation :

71.

The most abundant metal in the Earth’s crust is

Answer/ Hint      

Answer : C

Explanation :

72.

Helium is added to the oxygen supply of deep sea divers because it is

Answer/ Hint      

Answer : D

Explanation :

73.

What is used in storage batteries ?

Answer/ Hint      

Answer : C

Explanation :

74.

_________  gives hardness to stainless steel.

Answer/ Hint      

Answer : C

Explanation :

75.

Activated Charcoal is used to remove colouring matter from pure substances by

Answer/ Hint      

Answer : C

Explanation :

76.

Phosphorus is kept in water because

Answer/ Hint      

Answer : B

Explanation :

77.

Nitrification is the biological process of converting

Answer/ Hint      

Answer : C

Explanation :

78.

Which of the following is not a donor atom ?

Answer/ Hint      

Answer : D

Explanation :

79.

Which one of the following non-metals shows allotropy in the liquid state ?

Answer/ Hint      

Answer : B

Explanation :

80.

Silver gets corroded due to  _________  in air.

Answer/ Hint      

Answer : B

Explanation :

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