set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Rusting of an iron is an example of

a) oxidation

b) reduction

c) ionization

d) dissociation

Question : 2

Which one of the following is not an exothermic reaction ?

a) Burning of a candle

b) Respiration

c) Slaking of lime

d) Dipping of iron block in water

Question : 3

A molal solution is one that contains 1 mole of a solute in

a) one litre of the solution

b) one litre of the solvent

c) 1000 g of the solvent

d) 22.4 litres of the solution

Question : 4

The branch of chemistry which deals with study of physical properties and conditions is

a) nuclear chemistry

b) physical chemistry

c) analytical chemistry

d) pharmaceutical chemistry

Question : 5

The formula of sodium pyrophosphate is

a) Na₄ P₂O₇

b) Na₂ P₂O₇

c) Na₃ PO₄

d) Na₃ PO₃

Question : 6

Which of the following statements is true about chemical equation ?

a) Mass as well as atoms are conserved

b) Mass is conserved

c) Atoms are conserved

d) Molecules are conserved