Chemistry – Set 6

Chemistry – General – LS

Chemistry – Set 6

Dear ! This is Chemistry – Set 6 Quiz and it contains 100 questions.

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1. Epsom salt is used

As purgative

In softening water

In paper industry

In making tooth paste

2 / 100

2. Which is the purest commercial form of iron ?

Pig iron

Steel

Stainless steel

Wrought iron

3 / 100

3. Hard steel contains

2 to 5 per cent carbon

0.5 to 1.5 per cent carbon

0.1 to 0.4 per cent carbon

0.01 to 0.04 per cent carbon

4 / 100

4. Among the following, which is always found in free-state in nature?

Gold

Silver

Sodium

Copper

5 / 100

5. The weight of 6.023 × 10²³ atoms of carbon is

12 gms

120 gms

1.2 gms

0.12 gms

6 / 100

6. Which one of the following is not a characteristic feature of alloys?

Compounds

Mixtures

Solutions

Homogeneous systems

7 / 100

7. Most commonly used bleaching agent is

Sodium chloride

Alcohol

Carbon dioxide

Chlorine

8 / 100

8. Brass contains

Copper and Zinc

Copper and Tin

Copper and Silver

Copper and Nickel

9 / 100

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

10 / 100

10. Gold dissolves in

Hydrochloric acid

Nitric acid

Aqua regia

Acetic acid

11 / 100

11. Steel contains

0.1 – 5% carbon

5 – 10% carbon

More than 10% carbon

No carbon

12 / 100

12. Phosphorus is kept in water because

Its ignition temperature is very high

Its ignition temperature is very low

Its critical temperature is high

Its critical temperature is low

13 / 100

13. Froth floatation process to concentrate the minerals is applicable to

Calamine

Chalcopyrites

Bauxite

Haematite

14 / 100

14. What is the mass percentage of carbon in carbon dioxide (CO₂)?

15.8 %

20.1 %

27.3 %

32.3 %

15 / 100

15. Which of the following metals form an amalgam with other metals ?

Lead

Tin

Zinc

Mercury

16 / 100

16. Which of the following is an iron ore ?

Bauxite

Magnetite

Lignite

Nitrite

17 / 100

17. The most important ore of lead is

Galena

Magnetite

Pyrolusite

Siderite

18 / 100

18. Food cans are coated with tin and not with zinc because

Zinc is costlier than tin

Zinc has a higher melting point than tin

Zinc is more reactive than tin

Zinc is less reactive than tin

19 / 100

19. Which of the following metals occurs in free state ?

Copper

Iron

Zinc

Lead

20 / 100

20. In electro-refining, the pure metal is deposited on

Vessel

Electrolyte

Cathode

Anode

21 / 100

21. Chemically ‘Quick Silver’ is known as

Mercury

Silver

Aluminium

Copper

22 / 100

22. Solder is an alloy of

Lead, zinc

Copper, lead

Tin, lead

Sodium, lead

23 / 100

23. Among the following iron ores, the highest percentage of iron content is found in–

Haemetite

Magnetite

Limnonite

None of these

24 / 100

24. Brass is an alloy of

Lead and tin

Zinc and copper

Antimony, tin and lead

Zinc, tin and copper

25 / 100

25. Sodium is produced by the electrolysis of

Molten sodium carbonate

Molten sodium chloride

Aqueous brine solution

Its cyanide complex

26 / 100

26. Nitrogen in water is commonly found in the form of

Nitrous oxide

Nitrate

Nitric oxide

Nitrite

27 / 100

27. Hydrochloric acid is also known as

Galic acid

B. Picric acid

Muriatic acid

Chloric acid

28 / 100

28. Glycol is added to aviation gasoline because it

Reduces evaporation of petrol

Increases efficiency of petrol

Prevents freezing of petrol

Reduces consumption of petrol

29 / 100

29. Chemical name of Gammaxane is

Toluene

Chloro benzene

Aniline

Benzene hexachloride

30 / 100

30. Aluminium can be purified by

Oxidation

Distillation

Electrolysis

Ozonolysis

31 / 100

31. Water gas is the mixture of

Carbon dioxide and hydrogen

Carbon monoxide and nitrogen

Carbon monoxide and hydrogen

Carbon dioxide and nitrogen

32 / 100

32. Which of the following is a metallic ore ?

Mica

Quartz

Feldspar

Galena

33 / 100

33. Brass is a solution of molten copper in

Solid zinc

Molten zinc

Gaseous zinc

Molten tin

34 / 100

34. ________ gives hardness to stainless steel.

Zinc

Lead

Carbon

Tin

35 / 100

35. What is the mass percentage of oxygen in carbon dioxide (CO₂)?

30.5%

50.9 %

65.8 %

72.7 %

36 / 100

36. Solder metal is an alloy of

Lead and tin

Lead and antimony

Copper and zinc

Copper and tin

37 / 100

37. Freon used as refrigerant is chemically

Chlorinated hydrocarbon

Fluorinated hydrocarbon

Chlorofluoro hydrocarbon

Fluorinated aromatic compound

38 / 100

38. Which is the heaviest metal among the following?

Gold

Silver

Iron

Copper

39 / 100

39. The percentage of nitrogen present in ammonium sulphate is :

27%

25%

30.5%

18%

40 / 100

40. The purest form of Iron is :

Cast iron

Steel

Pig iron

Wrought iron

41 / 100

41. Bauxite is an alloy of which of the following metals ?

Aluminium

Silver

Tin

Iron

42 / 100

42. The substance which does not expand on going from liquid state to solid state is

Water

Cast-iron

Aluminium

Type metal

43 / 100

43. Which is the purest form of iron?

Steel

Cast iron

Pig iron

Wrought iron

44 / 100

44. The element which is used for vulcanizing rubber

Sulphur

Bromine

Silicon

Phosphorus

45 / 100

45. Number of 6.023 × 10²³ atoms present in one mole of a gas at STP is

6.023 × 10²⁰

6.023 × 10²³

6.023 × 10⁻²⁰

6.023 × 10⁻²³

46 / 100

46. Percentage of carbon in steel ranges from

0.1 to 1.5

1.5 to 3.0

3.0 to 4.0

4.0 to 6.0

47 / 100

47. Which of the following metals has least melting point ?

Gold

Silver

Mercury

Copper

48 / 100

48. Stainless steel is usually made by alloying the steel with

Copper and nickel

Copper and chromium

Chromium and nickel

Manganese and copper

49 / 100

49. The laws of electrolysis are given by

Ostwald

Faraday

Arrhenius

Lewis

50 / 100

50. Bleaching powder is prepared by passing :

Chlorine over slaked lime

Oxygen over slaked lime

Carbon dioxide over slaked lime

Chlorine over quick lirne

51 / 100

51. What is the principal ore of aluminium ?

Dolomite

Copper

Lignite

Bauxite

52 / 100

52. Which one of the following mineral does not contain oxygen ?

Haematite

Bauxite

Cryolite

Calcite

53 / 100

53. An alloy used in making heating elements for electric heating device is

Solder

Alloy Steel

Nichrome

German Silver

54 / 100

54. Iron is extracted from

Cinnabar

Haematite

Bauxite

Dolomite

55 / 100

55. The most abundant metal in the Earth’s crust is

Zinc

Copper

Aluminium

Iron

56 / 100

56. Which one of the following pairs is not correctly matched?

Haematite : Copper

Bauxite : Aluminium

Monazite : Thorium

Pitchblende : Uranium

57 / 100

57. The “King of Metals” is :

Gold

Silver

Iron

Aluminium

58 / 100

58. Which one of the following minerals is found in pure form?

Iron

Copper

Bauxite

Manganese

59 / 100

59. Brass is made of

Copper and tin

Tin and lead

Copper and zinc

Copper, tin and zinc

60 / 100

60. The gas used for artificial fruit ripening of green fruit is

Ethylene

Acetylene

Ethane

Methane

61 / 100

61. Which one of the following vegetable oils is used in the manufacture of paints?

Palm oil

Sunflower oil

Linseed oil

Cottonseed oil

62 / 100

62. The ore of Aluminium is

Fluorspar

Bauxite

Chalco pyrites

Hematite

63 / 100

63. Which of the following elements is not present in stainless steel?

Iron

Tungsten

Chromium

Nickel

64 / 100

64. Philosopher’s Wool is

Zinc carbonate

Zinc sulphate

Zinc oxide

Zinc blende

65 / 100

65. Copper is refined by

Roasting

Oxidation

Electrolysis

Zone refining

66 / 100

66. The value of Avogadro Number is

6.023 × 10²²

6.023 × 10²³

6.023 × 10²⁴

6.023 × 10²⁵

67 / 100

67. Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives

Copper at cathode and oxygen at anode

Copper at anode and oxygen at cathode.

Copper at cathode and anodes dissolve to give copper

Hydrogen at cathode and oxygen at anode

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68. Which among the following is found in chlorophyll ?

Ca²+

Mg²+

Fe²+

Al³+

69 / 100

69. Burning pyrites ore gives out

Carbon dioxide gas

Sulphur dioxide gas

Nitrogen dioxide gas

Nitric oxide gas

70 / 100

70. Bronze is an alloy of

Copper and Zinc

Tin and Zinc

Copper and Tin

Iron and Zinc

71 / 100

71. Among the following the hardest metal is

Gold

Iron

Platinum

Tungsten

72 / 100

72. The important metal used with iron to produce stainless steel is

Aluminium

Chromium

Tin

Carbon

73 / 100

73. Galena is a mineral of

Iron

Gold

Lead

Calcium

74 / 100

74. Aqua regia is a 1 : 3 mixture, by volume, of

Conc. nitric acid and conc. hydrochloric acid

Conc. hydrochloric acid and conc. nitric acid

Conc. nitric acid and conc. sulphuric acid

Conc. sulphuric acid and conc. nitric acid

75 / 100

75. What material is used to make electric heater coil ?

Copper

Iron

Silver

Nichrome

76 / 100

76. Which one is the most reactive gaseous element?

Chlorine

Bromine

Iodine

Flourine

77 / 100

77. The acid which is secreted by the glands in the stomach wall is

Sulphuric acid

Hydrochloric acid

Nitric acid

Phosphoric acid

78 / 100

78. Which of the following is used in welding broken pieces of iron rails and machine parts?

Aluminium sulphate

Solder

Aluminium powder

None of the above

79 / 100

79. Nitric acid does not react with

Gold

Copper

Zinc

Iron

80 / 100

80. Heating of a ore below its melting point in the absence of air is known as

Refining

Calcination

Roasting

Smelting

81 / 100

81. The metal extracted from Bauxite is :

Silver

Copper

Manganese

Aluminium

82 / 100

82. Of the following commonly used materials, the one that is not an alloy is

Steel

Brass

Bronze

Copper

83 / 100

83. Cinnabar is an ore/mineral of

Lead

Manganese

Molybdenum

Mercury

84 / 100

84. The percentage of carbon in cast iron is :

0.01 to 0.25

0.5 to 1.5

6 to 8

3 to 5

85 / 100

85. Which mineral is the ore of aluminium ?

Haematite

Bauxite

Magnetite

Siderite

86 / 100

86. If there is one million Mg²⁺ ions in MgCl_{2, how many chloride ions are there?}

Two million

One million

Half a million

Ten million

87 / 100

87. Which one of the following contains maximum percentage of carbon ?

Cast iron

Stainless steel

Wrought iron

High speed steel

88 / 100

88. Bridgmanite is

A bridge on the river Thames

Name of a game

Earth’s most abundant mineral

Name of a music

89 / 100

89. Slag is a name given for

Molten iron

Molten sand

Molten alumina

Molten calcium silicate

90 / 100

90. The iron ore which contains 72% of iron is :

Magnetite

Limonite

Haematite

Siderite

91 / 100

91. The manufacture of iron from iron ore involves the process of

Oxidation

Reduction

Fractional distillation

Electrolysis

92 / 100

92. The wire of flash bulbs is made up of

93 / 100

93. Stainless steel is an alloy of

Chromium and carbon

Chromium, carbon and iron

Chromium and iron

Carbon and iron

94 / 100

94. Brass is a

Compound

Element

Homogeneous mixture

Heterogeneous mixture

95 / 100

95. The important ore of aluminium is

Bauxite

Cryolite

Fluorspar

Haematite

96 / 100

96. Brass is an alloy of :

Cu, Al and Zn

Cu and Sn

Cu and Zn

Al and Mg

97 / 100

97. Which of the following electrodes is used in strongly alkaline solution?

Mercury – mercuric oxide electrode

Mercury – mercurous sulphate electrode

Mercury – mercurous chloride electrode

Silver – silver chloride electrode

98 / 100

98. Galvanised iron is made by coating iron with

Zinc

Nickel

Chromium

Sulphur

99 / 100

99. Bauxite is used as raw material by which industry ?

Aluminium

Iron

Steel

Gold

100 / 100

100. The aqueous solution of potassium chloride is

A weak electrolyte

A strong electrolyte

A non-electrolyte

Initially weak and then become a strong electrolyte

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