Chemistry MCQs

Question 1

The purest form of water is

Accepted Answer

Rain water

Answer

Tap water

Answer

Ground water

Answer

Distilled water

Question 2

Water cycle refers to

Accepted Answer

Constant movement of water from ocean to land and back to ocean once again

Answer

An integrated attempt to recycle water in relatively arid regions

Answer

Scientific management of water in areas excessively plagued with water-logging

Answer

Water distribution in relatively dry areas

Question 3

Permanent hardness of water may be removed by addition of

Accepted Answer

Sodium carbonate

Answer

Alum

Answer

Lime

Answer

Potassium Permangante

Question 4

Acid rain is caused due to pollution of atmosphere by

Accepted Answer

Oxides of nitrogen and sulphur

Answer

Oxides of carbon and nitrogen

Answer

Oxides of nitrogen and phosphorous

Answer

None of these

Question 5

What are the components responsible for acid rain?

Accepted Answer

Sulphur dioxide (SO2) and Nitrogen oxides (NOx)

Answer

Nitrogen monoxide (NO) and Carbon monoxide (CO)

Answer

Carbon dioxide (CO2) and Carbon monoxide (CO)

Answer

Oxides of carbon (COx) and Oxides of nitrogen (NOx)

Question 6

Which gas emitted by power stations causes acid rain?

Accepted Answer

Sulphur dioxide

Answer

Carbon dioxide

Answer

Helium

Answer

Nitrogen

Question 7

Which of the following appeared to be with a significant potential for accumulation through food chains ?

Accepted Answer

DDT

Answer

Parathion

Answer

Lindane

Answer

Carbaryl

Question 8

Higher concentration of nitrogen dioxide in atmosphere air causes

Accepted Answer

Bronchitis

Answer

Cancer

Answer

Asphyxiation

Answer

Corrosion

Question 9

Which of the following in automobile exhaust can cause cancer?

Accepted Answer

Polyclinic hydrocarbons

Answer

Oxides of nitrogen

Answer

Carbon monoxide

Answer

Lead