Question 1.
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is
A. Hydrogen
B. Oxygen
C. Carbon dioxide
D. All of them
Ans: C. Carbon dioxide
Question 2.
The most pure form of Carbon among the options is
A. Anthracite
B. Lampblack
C. Graphite
D. Wood Charcoal
Ans: A. Anthracite
Question 3.
Which of the following is used in making smoke bombs?
A. Sulphur
B. Phosphorus
C. Hydrogen
D. Carbon
Ans: D. Carbon
Question 4.
Electrolysis of an aqueous solution of copper sulphate using copper electrodes gives
A. Copper at cathode and oxygen at anode
B. Copper at anode and oxygen at cathode.
C. Copper at cathode and anodes dissolve to give copper
D. Hydrogen at cathode and oxygen at anode
Ans: D. Hydrogen at cathode and oxygen at anode
Question 5.
Which of the following is used as filler in tyre of rubber ?
A. Carbon black
B. Coal
C. Coke
D. Graphite
Ans: A. Carbon black
Question 6.
Carbon footprint can be reduced by
A. All of these
B. Recycling waste materials
C. Using energy efficient appliances
D. Commuting by public transport
Ans: A. All of these
Question 7.
Water gas is the mixture of
A. Carbon dioxide and hydrogen
B. Carbon monoxide and nitrogen
C. Carbon monoxide and hydrogen
D. Carbon dioxide and nitrogen
Ans: C. Carbon monoxide and hydrogen
Question 8.
Aluminium can be purified by
A. Oxidation
B. Distillation
C. Electrolysis
D. Ozonolysis
Ans: C. Electrolysis
Question 9.
The open “Sigrees” or coal stoves often require fanning to sustain burning because of
A. Tendency of carbon dioxide to form a layer along with dust smoke
B. Lack of oxygen in the surroundings of sigrees
C. Accumulation of smoke and dust over the sigrees
D. Interrupted release of moisture from the material
Ans: A. Tendency of carbon dioxide to form a layer along with dust smoke
Question 10.
Which of the following gases is most toxic ?
A. Carbon dioxide
B. Carbon monoxide
C. Sulphur dioxide
D. Chlorine
Ans: B. Carbon monoxide
Question 11.
In electro-refining, the pure metal is deposited on
A. Vessel
B. Electrolyte
C. Cathode
D. Anode
Ans: C. Cathode
Question 12.
The aqueous solution of potassium chloride is
A. A weak electrolyte
B. A strong electrolyte
C. A non-electrolyte
D. Initially weak and then become a strong electrolyte
Ans: B. A strong electrolyte
Question 13.
24 carat of diamond is equal to
A. 200 mg
B. 200 g
C. 95% mg
D. 91% gold
Ans: A. 200 mg
Question 14.
Why is water not suitable for putting out a petrol fire ?
A. The oxygen content of water is isolated by petrol and thus it helps in burning
B. Petrol is too inflammable to be extinguished by water
C. The heat required for combustion of petrol is very low
D. Water, being heavy, slips below petrol which thus remains in contact with air and burns
Ans: D. Water, being heavy, slips below petrol which thus remains in contact with air and burns
Question 15.
Which of the following electrodes is used in strongly alkaline solution?
A. Mercury – mercuric oxide electrode
B. Mercury – mercurous sulphate electrode
C. Mercury – mercurous chloride electrode
D. Silver – silver chloride electrode
Ans: A. Mercury – mercuric oxide electrode
Question 16.
Sodium is produced by the electrolysis of
A. Molten sodium carbonate
B. Molten sodium chloride
C. Aqueous brine solution
D. Its cyanide complex
Ans: B. Molten sodium chloride
Question 17.
1 carat of diamond is equal to
A. 200 mg
B. 200 g
C. 100 mg
D. 100 g
Ans: A. 200 mg
Question 18.
Which of the following is used as a lubricant in heavy machines?
A. Bauxite
B. Sulphur
C. Phosphorus
D. Graphite
Ans: D. Graphite
Question 19.
The laws of electrolysis are given by
A. Ostwald
B. Faraday
C. Arrhenius
D. Lewis
Ans: B. Faraday
Question 20.
Bleaching powder is prepared by passing :
A. Chlorine over slaked lime
B. Oxygen over slaked lime
C. Carbon dioxide over slaked lime
D. Chlorine over quick lirne
Ans: A. Chlorine over slaked lime
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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