1000+ TNPSC Chemistry Study Materials in Tamil & English Pdf - 1

Question: 1

Red litmus paper is changed into blue in solution of

(A) Acid

(B) Base

(C) Salt

(D) None of these

Question: 2

Source of vitamin C is

(A) Aaleic acid

(B) Oxalic acid

(C) Ascorbic acid

(D) Nitric acid

Question: 3

Substance which alter the velocity of reaction themselves remaining chemically and quantitatively themselves remaining chemically and quantitatively unchanged after reaction are known as

(A) Adsorbates

(B) Catalysts

(C) Indicators

(D) Surfactants

Question: 4

The efficiency of a heat engine is maximum when

(A) Temperature difference of source and sink is maximum

(B) Temperature difference of source and sink is minimum

(C) Temperature of sink is greater than that of source

(D) Temperature of source is greater than that of sink

Question: 5

An ideal gas is one which obeys

(A) Avogadro’s law

(B) Boyle’s laws

(C) Charles law

(D) Gas laws