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

Question : 6

Which among the following statements is false?

a) The main reason for river water pollution is industrial and domestic sewage discharge

b) Surface water contains a lot of organic matter mineral nutrients and radioactive materials

c) Oil slick in sea water increases D.O. value

d) Oil spill in sea water causes heavy damage to fishery

Question : 7

Living in the atmosphere of CO is dangerous because it

a) Dries up the blood

b) Reduces organic matter of tissues

c) Combined with O₂ present inside to form CO₂

d) Combines with haemoglobin and makes it incapable of absorbing oxygen

Question : 8

The greatest affinity for haemoglobin is shown by which of the following :

a) CO

b) O₂

c) NO

d) CO₂

Question : 9

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

a) slightly higher than that when the thunderstorm is not there

b) uninfluenced by occurrence of thunderstorm

c) slightly lower than that of rain water without thunderstorm

d) which depends upon the amount of dust in air

Question : 10

The pollutants which came directly in the air from sources are called primary pollutants. Primary pollutants are sometimes converted into secondary pollutants. Which of the following belongs to secondary air pollutants?

a) Hydrocarbon

b) Peroxyacetyl nitrate

c) CO

d) NO