General Principles of Extraction of metal 100 MCQ for NEET
1. Which of the following is not a metal extraction process?
a. Froth floatation
b. Roasting
c. Calcination
d. Distillation
Answer: d. Distillation
2. The process of converting an ore into its oxide by heating it in the absence of air is called:
a. Roasting
b. Smelting
c. Calcination
d. Reduction
Answer: c. Calcination
3. The reduction of metal oxides with the help of carbon is known as:
a. Smelting
b. Electrolysis
c. Reduction
d. Displacement
Answer: a. Smelting
4. Which of the following is an example of a native metal?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: c. Gold
5. The process of removing gangue from the ore is called:
a. Roasting
b. Calcination
c. Concentration
d. Smelting
Answer: c. Concentration
6. The reduction of metal oxides using electricity is known as:
a. Roasting
b. Calcination
c. Electrolysis
d. Smelting
Answer: c. Electrolysis
7. Which metal is extracted from bauxite ore?
a. Iron
b. Aluminum
c. Copper
d. Zinc
Answer: b. Aluminum
8. The process of converting an ore into its oxide by heating it strongly in the presence of excess air is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: a. Roasting
9. Which of the following is used as a reducing agent in the extraction of iron?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Oxygen
Answer: a. Carbon monoxide
10. The process of extracting metals from ores using microorganisms is known as:
a. Bioleaching
b. Electrolysis
c. Smelting
d. Roasting
Answer: a. Bioleaching
11. Which metal is extracted from hematite ore?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: a. Iron
12. Which metal is obtained by the electrolysis of molten bauxite?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: b. Aluminum
13. The process of heating an ore in the presence of excess air is called:
a. Roasting
b. Calcination
c. Reduction
d. Smelting
Answer: a. Roasting
14. Which of the following is a non-ferrous metal?
a. Iron
b. Aluminum
c. Copper
d. All of the above
Answer: c. Copper
15. Which metal is extracted from cinnabar ore?
a. Iron
b. Aluminum
c. Mercury
d. Zinc
Answer: c. Mercury
16. The process of converting an ore into its oxide by heating it in the presence of limited air is called:
a. Roasting
b. Calcination
c
. Smelting
d. Reduction
Answer: a. Roasting
17. Which of the following is used as a reducing agent in the extraction of copper?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Iron
Answer: d. Iron
18. The process of separating metals from their impurities based on the difference in their densities is called:
a. Roasting
b. Calcination
c. Smelting
d. Gravity separation
Answer: d. Gravity separation
19. Which metal is obtained from its ore by the process of distillation?
a. Iron
b. Aluminum
c. Mercury
d. Zinc
Answer: c. Mercury
20. The process of extracting metals from their ores by the use of aqueous solutions of suitable reagents is known as:
a. Leaching
b. Smelting
c. Calcination
d. Roasting
Answer: a. Leaching
21. Which of the following is a pyrometallurgical process?
a. Leaching
b. Electrolysis
c. Smelting
d. Distillation
Answer: c. Smelting
22. The process of converting an ore into its metal by heating it strongly with a reducing agent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: d. Reduction
23. Which metal is obtained by the electrolysis of molten zinc oxide?
a. Iron
b. Aluminum
c. Gold
d. Zinc
Answer: d. Zinc
24. The process of converting an ore into its metal by heating it strongly in the presence of excess air is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: a. Roasting
25. Which of the following is used as a reducing agent in the extraction of gold?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Zinc
Answer: d. Zinc
26. The process of separating a metal from its ore by heating the ore with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: a. Roasting
27. Which metal is extracted from galena ore?
a. Iron
b. Aluminum
c. Gold
d. Lead
Answer: d. Lead
28. The process of converting an ore into its metal by heating it strongly in the absence of air is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: d. Reduction
29. Which of the following is used as a reducing agent in the extraction of aluminum?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Aluminum
Answer: a. Carbon monoxide
30. The process of extracting metals from their ores using bacteria is known as:
a. Bioleaching
b. Electrolysis
c. Smelting
d. Roasting
Answer: a. Bioleaching
31. Which metal is obtained by the electrolysis of molten iron ore?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: a. Iron
32.
Which metal is extracted from malachite ore?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
33. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
34. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Zinc
Answer: d. Zinc
35. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
36. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
37. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
38. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
39. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
40. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Zinc
Answer: d. Zinc
41. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
42. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
43. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
44. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
45. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
46. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
47. The process of separating metals from their impurities based on the difference in their boiling points
is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
48. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
49. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
50. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
51. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
52. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
53. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
54. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
55. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
56. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
57. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
58. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
59. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
60. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
61. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
62. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon
monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
63. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
64. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
65. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
66. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
67. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
68. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
69. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
70. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
71. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
72. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
73. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
74. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
75. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
76. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
77. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b.
Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
78. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
79. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
80. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
81. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
82. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
83. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
84. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
85. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
86. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
87. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
88. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
89. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
90. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
91. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
92. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
93. The process of converting an ore into its metal by heating it strongly in the presence of excess carbon is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
94. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
95. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
96. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
97. The process of converting an ore into its metal by heating it strongly with a suitable reagent is called:
a. Roasting
b. Calcination
c. Smelting
d. Reduction
Answer: c. Smelting
98. Which of the following is used as a reducing agent in the extraction of silver?
a. Carbon monoxide
b. Carbon dioxide
c. Hydrogen
d. Copper
Answer: d. Copper
99. The process of separating metals from their impurities based on the difference in their boiling points is called:
a. Roasting
b. Calcination
c. Smelting
d. Distillation
Answer: d. Distillation
100. Which metal is obtained from its ore by the process of liquation?
a. Iron
b. Aluminum
c. Gold
d. Copper
Answer: d. Copper
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