Question 1.
Copper substances when exposed to air gains a green coating due to the formation of:
A. CuO
B. CuCO3 Cu(OH)2
C. CuSO4
D. Cu(NO3)2
Ans: B. CuCO3 Cu(OH)2
Question 2.
Which among the following is used to dilute oxygen in the gas cylinders used by divers ?
A. Krypton
B. Argon
C. Helium
D. Neon
Ans: C. Helium
Question 3.
Which one among the following is not a mixture?
A. Graphite
B. Glass
C. Brass
D. Steel
Ans: A. Graphite
Question 4.
The material used in the manufacture of lead pencil is
A. Graphite
B. Lead
C. Carbon
D. Mica
Ans: A. Graphite
Question 5.
Browning of paper in old books is caused by
A. Frequent use
B. Lack of aeration
C. Collection of dust
D. Oxidation of cellulose
Ans: D. Oxidation of cellulose
Question 6.
Which one element from below list is liquid at room temperature?
A. Zinc
B. Argon
C. Lead
D. Bromine
Ans: D. Bromine
Question 7.
The gas used to dilute oxygen for breathing by deep sea divers is:
A. Neon
B. Argon
C. Nitrogen
D. Helium
Ans: D. Helium
Question 8.
Water can be separated from alcohol water mixture by
A. Decantation
B. Evaporation
C. Distillation
D. Sublimation
Ans: C. Distillation
Question 9.
Catalyst is a substance which
A. Increases the rate of the reaction
B. Decreases the rate of reaction
C. Has no action on the rate of the reaction
D. None of these
Ans: D. None of these
Question 10.
Which among the following elements is found in maximum percentage in the human body ?
A. Carbon
B. Hydrogen
C. Nitrozen
D. Oxygen
Ans: D. Oxygen
Question 11.
The most abundant element in the human body is
A. Carbon
B. Iron
C. Nitrogen
D. Oxygen
Ans: D. Oxygen
Question 12.
In addition to hydrogen, the other abundant element present on Sun’s surface is
A. Helium
B. Neon
C. Argon
D. Oxygen
Ans: A. Helium
Question 13.
When quick lime is added to water
A. Heat is liberated
B. Heat is absorbed
C. Temperature decreases
D. No heat change takes place
Ans: A. Heat is liberated
Question 14.
Iodine can be separated from a mixture of Iodine and Potassium Chloride by
A. Sedimentation
B. Filtration
C. Sublimation
D. Distillation
Ans: C. Sublimation
Question 15.
The most abundant element in the earth’s atmosphere is
A. Argon
B. Nitrogen
C. Oxygen
D. Krypton
Ans: B. Nitrogen
Question 16.
The most abundant element by number in the living system is :
A. Nitrogen
B. Hydrogen
C. Oxygen
D. Carbon
Ans: B. Hydrogen
Question 17.
What is the element that is in the highest percentage in the composition of the earth ?
A. Silicon
B. Oxygen
C. Magnesium
D. Iron
Ans: B. Oxygen
Question 18.
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is:
A. Neon
B. Argon
C. Krypton
D. Helium
Ans: D. Helium
Question 19.
Select the one which is not a mixture :
A. Air
B. Gasoline
C. LPG
D. Distilled water
Ans: D. Distilled water
Question 20.
What is the element required for solar energy conversion ?
A. Beryllium
B. Tantalum
C. Silicon
D. Ultra pure carbon
Ans: C. Silicon
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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