Top 500+ TNPSC Group 4 Chemistry Questions and Answers - 3
Question: 11
All acids contain the element
(A) Nitrogen
(B) Oxygen
(C) Helium
(D) Hydrogen
Ans: D
Hydrogen
Question: 12
Production of chlorofluorocarbons (CFC) gas which is banned in India, was used in which of the following domestic products?
(A) Refrigerator
(B) Cooking gas
(C) Tubelight
(D) Television
Ans: A
Refrigerator
Question: 13
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
(A) Gun powder
(B) Paint
(C) Cement
(D) Glass
Ans: A
Gun powder
Question: 14
The setting of plaster of Paris can be catalyzed by adding
(A) Alum
(B) Borax
(C) Lead oxide
(D) Sodium chloride
Ans: D
Sodium chloride
Question: 15
Mason was discovered by
(A) Anderson
(B) Seaburg
(C) Yukawa
(D) Powell
Ans: C
Yukawa
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