environmental chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 1

Green chemistry means such reactions which

a) reduce the use and production of hazardous chemicals

b) are related to the depletion of ozone layer

c) produce colour during reactions

d) study the reactions in plants

Question : 2

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 : 3 [NDA]

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 : 4

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.

Question : 5

The filament of an electric bulb is of tungsten because –

a) It is cheaper

b) Its resistance is negligible

c) Its melting point is high

d) Filament is easily made