Question 1.
The metal that is usually extracted from sea water is
A. Ca
B. Na
C.K
D. Mg
Ans: D. Mg
Question 2.
Ozone layer of atmosphere absorbs:
A. Ultraviolet rays
B. Infra-red rays
C. All radiations of Light
D. Cosmic rays.
Ans: A. Ultraviolet rays
Question 3.
The percentage of Nitrogen in Air is
A. 0.94
B. 0.03
C. 78.03
D. 85.02
Ans: C. 78.03
Question 4.
Diamonds are glittering and attractive because light incident on them undergoes
A. Highest refraction
B. Multiple internal reflections
C. Multiple surface reflections
D. Hundred percent transmission
Ans: B. Multiple internal reflections
Question 5.
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
A. liquation
B. leaching
C. levigation
D. magnetic separation
Ans: C. levigation
Question 6.
Air shows the property of
A. N2
B. O2
C. Both A and B
D. None of these
Ans: C. Both A and B
Question 7.
Air is said to be saturated when :
A. It contains maximum content of water vapour
B. Its pressure is minimum
C. Its thickness is maximum
D.It blows over the barren land
Ans: A. It contains maximum content of water vapour
Question 8.
If lime water is kept in the air, it turns milky due to presence of :
A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Sulphurdioxide
Ans: A. Carbon dioxide
Question 9.
The inert gases are __ in water.
A. sparingly soluble
B. insoluble
C. soluble
D. None of these
Ans: A. sparingly soluble
Question 10.
The most abundant constituent of atmospheric air is :
A. Carbon
B. Hydrogen
C. Oxygen
D. Nitrogen
Ans: D. Nitrogen
Question 11.
For extinguishing fire, we use
A. Hydrogen
B. Carbon Monoxide
C. Carbon Dioxide
D. Marsh gas
Ans: C. Carbon Dioxide
Question 12.
Diamond is harder than graphite because of :
A. Difference in layers of atoms
B. Tetrahedral structure of diamond
C. Difference of crystalline structures
D. None of these
Ans: A. Difference in layers of atoms
Question 13.
The molecular formula of phosphorous is
A. P1
B. P2
C. P3
D. P4
Ans: D. P4
Question 14.
The percentage of oxygen in air is approximately
A. 100%
B. 1%
C. 78%
D. 21%
Ans: D. 21%
Question 15.
Dry powder fire extinguishers contain
A. Sand
B. Sand and sodium carbonate
C. Sand and potassium carbonate
D. Sand and sodium bicarbonate
Ans: D. Sand and sodium bicarbonate
Question 16.
The gas used to extinguish fire is
A. Neon
B. Nitrogen
C. Carbon dioxide
D. Carbon monoxide
Ans: C. Carbon dioxide
Question 17.
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
A. atomic structure
B. metallurgy
C. periodic table of contents
D. discovery of elements
Ans: C. periodic table of contents
Question 18.
The major constituent of air is
A. Nitrogen
B. Carbon dioxide
C. Oxygen
D. Hydrogen
Ans: A. Nitrogen
Question 19.
Dry ice is the solid form of :
A. Air
B. Carbon dioxide
C. Nitrogen
D. Water
Ans: B. Carbon dioxide
Question 20.
Which among the following coal contains 90 per cent of carbon?
A. Anthracite
B. Bitumen
C. Lignite
D. Peat
Ans: A. Anthracite
Chemistry GK MCQs all set
- Chemistry GK MCQs Set-1
- Chemistry GK MCQs Set-2
- Chemistry GK MCQs Set-3
- Chemistry GK MCQs Set-4
- Chemistry GK MCQs Set-5
- Chemistry GK MCQs Set-6
- Chemistry GK MCQs Set-7
- Chemistry GK MCQs Set-8
- Chemistry GK MCQs Set-9
- Chemistry GK MCQs Set-10
- Chemistry GK MCQs Set-11
- Chemistry GK MCQs Set-12
- Chemistry GK MCQs Set-13
- Chemistry GK MCQs Set-14
- Chemistry GK MCQs Set-15
- Chemistry GK MCQs Set-16
- Chemistry GK MCQs Set-17
- Chemistry GK MCQs Set-18
- Chemistry GK MCQs Set-19
- Chemistry GK MCQs Set-20
- Chemistry GK MCQs Set-21
- Chemistry GK MCQs Set-22
- Chemistry GK MCQs Set-23
- Chemistry GK MCQs Set-24
- Chemistry GK MCQs Set-25
- Chemistry GK MCQs Set-26
- Chemistry GK MCQs Set-27
- Chemistry GK MCQs Set-28
- Chemistry GK MCQs Set-29
- Chemistry GK MCQs Set-30
- Chemistry GK MCQs Set-31
- Chemistry GK MCQs Set-32
- Chemistry GK MCQs Set-33
- Chemistry GK MCQs Set-34
- Chemistry GK MCQs Set-35
- Chemistry GK MCQs Set-36
- Chemistry GK MCQs Set-37
- Chemistry GK MCQs Set-38
- Chemistry GK MCQs Set-39
- Chemistry GK MCQs Set-40
- Chemistry GK MCQs Set-41
- Chemistry GK MCQs Set-42
- Chemistry GK MCQs Set-43
- Chemistry GK MCQs Set-44
- Chemistry GK MCQs Set-45
- Chemistry GK MCQs Set-46
- Chemistry GK MCQs Set-47
- Chemistry GK MCQs Set-48
- Chemistry GK MCQs Set-49
- Chemistry GK MCQs Set-50
- Chemistry GK MCQs Set-51
- Chemistry GK MCQs Set-52
- Chemistry GK MCQs Set-53
- Chemistry GK MCQs Set-54
- Chemistry GK MCQs Set-55
- Chemistry GK MCQs Set-56
- Chemistry GK MCQs Set-57
- Chemistry GK MCQs Set-58
- Chemistry GK MCQs Set-59
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