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51.

Which of the following pollutant is not the product of automobile exhaust?

A.	SO2	B.	Fly ash
C.	CO	D.	Hydrocarbons

52.

The effect of today's radioactive fallout will probably be more harmful to children of future generations than to children now living because:

A.	Contamination of milk supply is not cumulative	B.	Infants are more susceptible to radiation
C.	Susceptibility to radiation increases with age	D.	Mutated genes are frequently recessive

53.

Minimata diseased was caused due to water pollution by:

A.	Lead	B.	Cyanides
C.	Methyl isocyanate	D.	Mercury

54.

Which of the following gases is regarded as an atmospheric pollutant?

A.	O2	B.	O3
C.	SO2	D.	N2

55.

Most severe environmental hazard to mankind is due to:

A.	Air pollution	B.	Water pollution
C.	Noise Pollution	D.	Radioactive pollution

56.

It is advised not to have brick kiln near fruit orchard:

A.	To save the trees from erosion	B.	To safeguard the fruits from large labour population
C.	To save the trees from poisonous fumes/smoke from the brick chimneys	D.	To protect the orchard from the operation of trucks meant for transporting fruits

57.

Green-house effect is due to the presence of:

A.	Ozone layer in the atmosphere	B.	Infra-red radiations
C.	Moisture in the atmosphere	D.	CO2 in the atmosphere

58.

Tajmahal is threatened due to the presence of:

A.	Chlorine/NO2	B.	SO2
C.	Oxygen/ozone	D.	Hydrocarbons

59.

Whn excess of sewage is dumped in the river, its BOD:

A.	Increases	B.	Slightly decreases
C.	Remains unchanged	D.	Decreases drastically

60.

The most harmful component of detergents causing water pollution is:

A.	Linear alkyl sulphonate	B.	Sulphates and phosphate
C.	Alkyl benzenes sulphonate	D.	None of these