Chemistry MCQ for Competitive Exams with Answers - 1
Question: 1
Washing soda is the common name of
(A) Sodium Carbonate
(B) Sodium Bi-Carbonate
(C) Calcium Carbonate
(D) Calcium Bi-Carbonate
Ans: A
Sodium Carbonate
Question: 2
Which of the following ores does not contain iron?
(A) Cassiterite
(B) Limonite
(C) Magnetite
(D) Haematite
Ans: A
Cassiterite
Question: 3
Heavy water is so called because it
(A) is the mercury contaminated water
(B) contains the heavier isotope of hydrogen in water
(C) is saline water used in hospitals
(D) contains a number of salts as in sea water
Ans: B
contains the heavier isotope of hydrogen in water
Question: 4
The chemical used as a ‘fixer’ in photography is:
(A) Ammonium persulphate
(B) Sodium sulphate
(C) Sodium thiosulphate
(D) Borax
Ans: C
Sodium thiosulphate
Question: 5
The substance which decreases the rate of a chemical reaction is called
(A) Inhibitor
(B) Moderator
(C) Promoter
(D) Poison
Ans: D
Poison
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