TNPSC Group 4 Question Paper with Answers 2019-2020 - 1

Question: 1

_____ makes a lemon sour.

(A) Acetic acid

(B) Citric acid

(C) Hydrochloric acid

(D) Tartaric acid

Question: 2

The name of the particle ‘Boson’ is associated with the name of

(A) Albert Einstein

(B) Isaac Newton

(C) S.N. Bose

(D) J.C Bose

Question: 3

Bleaching powder is made from

(A) Sulphur dioxide and gypsum

(B) Chlorine and charcoal

(C) Soda ash and lime

(D) Lime and chlorine

Question: 4

Hard water does not lather well with soap because

(A) It contains suspended impurities

(B) It is highly coloured

(C) It contains sodium chloride

(D) It contains carbonates of calcium and magnesium

Question: 5

Which one of the following laws explains the formation of carbon monoxide and carbon dioxide from carbon and oxygen?

(A) Law of definite proportions

(B) Law of reciprocal proportions

(C) Law of multiple proportions

(D) Law of conservation of mass