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. Which is the heaviest metal among the following?

Gold

Silver

Iron

Copper

2 / 100

2. 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

3 / 100

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

Lead

Tin

Zinc

Mercury

4 / 100

4. 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

5 / 100

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

15.8 %

20.1 %

27.3 %

32.3 %

6 / 100

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

Copper and nickel

Copper and chromium

Chromium and nickel

Manganese and copper

7 / 100

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

Aluminium

Chromium

Tin

Carbon

8 / 100

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

Gold

Silver

Sodium

Copper

9 / 100

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

Gold

Silver

Mercury

Copper

10 / 100

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

Cast iron

Stainless steel

Wrought iron

High speed steel

11 / 100

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

Steel

Brass

Bronze

Copper

12 / 100

12. The percentage of carbon in cast iron is :

0.01 to 0.25

0.5 to 1.5

6 to 8

3 to 5

13 / 100

13. Iron is extracted from

Cinnabar

Haematite

Bauxite

Dolomite

14 / 100

14. Steel contains

0.1 – 5% carbon

5 – 10% carbon

More than 10% carbon

No carbon

15 / 100

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

Copper

Iron

Zinc

Lead

16 / 100

16. 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

17 / 100

17. Hydrochloric acid is also known as

Galic acid

B. Picric acid

Muriatic acid

Chloric acid

18 / 100

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

Iron

Tungsten

Chromium

Nickel

19 / 100

19. 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

20 / 100

20. Solder is an alloy of

Lead, zinc

Copper, lead

Tin, lead

Sodium, lead

21 / 100

21. The most important ore of lead is

Galena

Magnetite

Pyrolusite

Siderite

22 / 100

22. Water gas is the mixture of

Carbon dioxide and hydrogen

Carbon monoxide and nitrogen

Carbon monoxide and hydrogen

Carbon dioxide and nitrogen

23 / 100

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

Haematite

Bauxite

Cryolite

Calcite

24 / 100

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

25 / 100

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

27%

25%

30.5%

18%

26 / 100

26. Which one is the most reactive gaseous element?

Chlorine

Bromine

Iodine

Flourine

27 / 100

27. 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

28 / 100

28. Brass contains

Copper and Zinc

Copper and Tin

Copper and Silver

Copper and Nickel

29 / 100

29. The wire of flash bulbs is made up of

30 / 100

30. Solder metal is an alloy of

Lead and tin

Lead and antimony

Copper and zinc

Copper and tin

31 / 100

31. Slag is a name given for

Molten iron

Molten sand

Molten alumina

Molten calcium silicate

32 / 100

32. Cinnabar is an ore/mineral of

Lead

Manganese

Molybdenum

Mercury

33 / 100

33. Sodium is produced by the electrolysis of

Molten sodium carbonate

Molten sodium chloride

Aqueous brine solution

Its cyanide complex

34 / 100

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

Solder

Alloy Steel

Nichrome

German Silver

35 / 100

35. Freon used as refrigerant is chemically

Chlorinated hydrocarbon

Fluorinated hydrocarbon

Chlorofluoro hydrocarbon

Fluorinated aromatic compound

36 / 100

36. Philosopher’s Wool is

Zinc carbonate

Zinc sulphate

Zinc oxide

Zinc blende

37 / 100

37. Stainless steel is an alloy of

Chromium and carbon

Chromium, carbon and iron

Chromium and iron

Carbon and iron

38 / 100

38. The important ore of aluminium is

Bauxite

Cryolite

Fluorspar

Haematite

39 / 100

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

30.5%

50.9 %

65.8 %

72.7 %

40 / 100

40. The laws of electrolysis are given by

Ostwald

Faraday

Arrhenius

Lewis

41 / 100

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

Zinc

Copper

Aluminium

Iron

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

Refining

Calcination

Roasting

Smelting

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43. Brass is a solution of molten copper in

Solid zinc

Molten zinc

Gaseous zinc

Molten tin

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

Haematite : Copper

Bauxite : Aluminium

Monazite : Thorium

Pitchblende : Uranium

45 / 100

45. Glycol is added to aviation gasoline because it

Reduces evaporation of petrol

Increases efficiency of petrol

Prevents freezing of petrol

Reduces consumption of petrol

46 / 100

46. The aqueous solution of potassium chloride is

A weak electrolyte

A strong electrolyte

A non-electrolyte

Initially weak and then become a strong electrolyte

47 / 100

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

Compounds

Mixtures

Solutions

Homogeneous systems

48 / 100

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

Magnetite

Limonite

Haematite

Siderite

49 / 100

49. 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

50 / 100

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

Iron

Copper

Bauxite

Manganese

51 / 100

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

Oxidation

Reduction

Fractional distillation

Electrolysis

52 / 100

52. Bleaching powder is prepared by passing :

Chlorine over slaked lime

Oxygen over slaked lime

Carbon dioxide over slaked lime

Chlorine over quick lirne

53 / 100

53. Which is the purest commercial form of iron ?

Pig iron

Steel

Stainless steel

Wrought iron

54 / 100

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

12 gms

120 gms

1.2 gms

0.12 gms

55 / 100

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

Aluminium

Silver

Tin

Iron

56 / 100

56. Bronze is an alloy of

Copper and Zinc

Tin and Zinc

Copper and Tin

Iron and Zinc

57 / 100

57. Brass is made of

Copper and tin

Tin and lead

Copper and zinc

Copper, tin and zinc

58 / 100

58. Gold dissolves in

Hydrochloric acid

Nitric acid

Aqua regia

Acetic acid

59 / 100

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

Aluminium

Iron

Steel

Gold

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60. Which among the following is found in chlorophyll ?

Ca²+

Mg²+

Fe²+

Al³+

61 / 100

61. ________ gives hardness to stainless steel.

Zinc

Lead

Carbon

Tin

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62. Which is the purest form of iron?

Steel

Cast iron

Pig iron

Wrought iron

63 / 100

63. 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

64 / 100

64. The element which is used for vulcanizing rubber

Sulphur

Bromine

Silicon

Phosphorus

65 / 100

65. The value of Avogadro Number is

6.023 × 10²²

6.023 × 10²³

6.023 × 10²⁴

6.023 × 10²⁵

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66. Brass is an alloy of :

Cu, Al and Zn

Cu and Sn

Cu and Zn

Al and Mg

67 / 100

67. Which of the following is an iron ore ?

Bauxite

Magnetite

Lignite

Nitrite

68 / 100

68. Aluminium can be purified by

Oxidation

Distillation

Electrolysis

Ozonolysis

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69. Which mineral is the ore of aluminium ?

Haematite

Bauxite

Magnetite

Siderite

70 / 100

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

Ethylene

Acetylene

Ethane

Methane

71 / 100

71. Nitric acid does not react with

Gold

Copper

Zinc

Iron

72 / 100

72. The metal extracted from Bauxite is :

Silver

Copper

Manganese

Aluminium

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73. Most commonly used bleaching agent is

Sodium chloride

Alcohol

Carbon dioxide

Chlorine

74 / 100

74. Burning pyrites ore gives out

Carbon dioxide gas

Sulphur dioxide gas

Nitrogen dioxide gas

Nitric oxide gas

75 / 100

75. Chemical name of Gammaxane is

Toluene

Chloro benzene

Aniline

Benzene hexachloride

76 / 100

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

Water

Cast-iron

Aluminium

Type metal

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77. 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

78 / 100

78. Brass is a

Compound

Element

Homogeneous mixture

Heterogeneous mixture

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

Vessel

Electrolyte

Cathode

Anode

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80. What is the principal ore of aluminium ?

Dolomite

Copper

Lignite

Bauxite

81 / 100

81. The ore of Aluminium is

Fluorspar

Bauxite

Chalco pyrites

Hematite

82 / 100

82. Copper is refined by

Roasting

Oxidation

Electrolysis

Zone refining

83 / 100

83. Which of the following is a metallic ore ?

Mica

Quartz

Feldspar

Galena

84 / 100

84. Epsom salt is used

As purgative

In softening water

In paper industry

In making tooth paste

85 / 100

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

Copper

Iron

Silver

Nichrome

86 / 100

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

Calamine

Chalcopyrites

Bauxite

Haematite

87 / 100

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

Haemetite

Magnetite

Limnonite

None of these

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

Nitrous oxide

Nitrate

Nitric oxide

Nitrite

89 / 100

89. Chemically ‘Quick Silver’ is known as

Mercury

Silver

Aluminium

Copper

90 / 100

90. 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

91 / 100

91. 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

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92. Among the following the hardest metal is

Gold

Iron

Platinum

Tungsten

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93. The “King of Metals” is :

Gold

Silver

Iron

Aluminium

94 / 100

94. Galvanised iron is made by coating iron with

Zinc

Nickel

Chromium

Sulphur

95 / 100

95. Brass is an alloy of

Lead and tin

Zinc and copper

Antimony, tin and lead

Zinc, tin and copper

96 / 100

96. Galena is a mineral of

Iron

Gold

Lead

Calcium

97 / 100

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

Palm oil

Sunflower oil

Linseed oil

Cottonseed oil

98 / 100

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

Sulphuric acid

Hydrochloric acid

Nitric acid

Phosphoric acid

99 / 100

99. Bridgmanite is

A bridge on the river Thames

Name of a game

Earth’s most abundant mineral

Name of a music

100 / 100

100. The purest form of Iron is :

Cast iron

Steel

Pig iron

Wrought iron

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