Question 1.
One carat of diamond is equal to
A. 100 mg
B. 150 mg
C. 200 mg
D. 250 mg
Ans: C. 200 mg
Question 2.
Which of the following gases is present under pressure in soft drinks?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Nitrous oxide
Ans: C. Carbon dioxide
Question 3.
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is
A. CO2
B. O3
C. CO
D. All of these
Ans: C. CO
Question 4.
Which type of fire extinguisher is used for petroleum fire ?
A. Foam type
B. Soda acid type
C. Powder type
D. None of these
Ans: A. Foam type
Question 5.
Carbon dioxide is
A. A reducing agent
B. An oxidising agent
C. A dehydrating agent
D. A bleaching agent
Ans: A. A reducing agent
Question 6.
If we burn graphite,
A. Residue will be left
B. No residue will be left
C. It will not burn
D. It will change into diamond
Ans: B. No residue will be left
Question 7.
Water gas is the combination of
A. CO and H2
B. CO2and H2
C. CO and H2O
D. CO2 and CO
Ans: A. CO and H2
Question 8.
Man dies in the atmosphere of CO, because it
A. Dries up the blood
B. Combines with O2 present in the body
C. Reduces the organic matter of tissues
D. Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
Ans: D. Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2
Question 9.
Hardest allotrope of carbon is
A. Diamond
B. Graphite
C. Coke
D. Lamp black
Ans: A. Diamond
Question 10.
Lead pencil contains
A. Lead
B. Ferrous sulphide
C. Lead sulphide
D. Graphite
Ans: D. Graphite
Question 11.
The gas that causes suffocation and death when coal or coke is burnt in a closed room is
A. Methane
B. Ethane
C. Carbon monoxide
D. Carbon dioxide
Ans: C. Carbon monoxide
Question 12.
It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of
A. CO2
B. CO
C. Unburnt petrol
D. SO2
Ans: B. CO
Question 13.
Diamond is lustrous because
A. It is colourless
B. It is hard
C. It is pure
D. Its refractive index is high
Ans: D. Its refractive index is high
Question 14.
Highest percentage of carbon is found in which form of coal?
A. Anthracite
B. Bituminous
C. Peat
D. Lignite
Ans: A. Anthracite
Question 15.
Which one is not a pure form of carbon?
A. Coal
B. Graphite
C. Diamond
D. Gold
Ans: D. Gold
Question 16.
Which gas is used as fire extinguisher ?
A. Carbon dioxide
B. Carbon monoxide
C. Carbon suboxide
D. Sulphur dioxide
Ans: A. Carbon dioxide
Question 17.
Dry ice is
A. Solid ammonia
B. Solid sulphur dioxide
C. Dry carbon dioxide gas
D. Solid carbon dioxide
Ans: D. Solid carbon dioxide
Question 18.
The main source of carbon monoxide is
A. Industrial process
B. Fuel combustion
C. Transportation
D. Solid waste disposal
Ans: C. Transportation
Question 19.
Which one is the purest form of carbon?
A. Coal
B. Graphite
C. Diamond
D. Iron
Ans: C. Diamond
Question 20.
The process which does not evolve CO2 in air is
A. Burning
B. Breathing
C. Organic delay
D. Photosynthesis
Ans: D. Photosynthesis
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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