set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

The statement which is not true:

a) SO₃ is more harmful air pollutant than SO₂

b) NO₂ does not play any role in photochemical smog

c) SO₂ does not affect larynx (voice box)

d) NO is more toxic to living tissues than NO₂

Question : 2

Flint glass is obtained from which of the following?

a) Sodium aluminum borosilicate

b) Sand, red lead and potassium carbonate

c) Zinc and barium borosilicate

d) Pure silica and zinc oxide

Question : 3

Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because __________.

a) the reaction can be initiated only in presence of a catalyst.

b) oxides of nitrogen are unstable.

c) the reaction is endothermic and requires very high temperature.

d) N₂ and O₂ are unreactive.