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Question: ‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
[A].

industrial chimney exhaust.

[B].

automobiles exhaust.

[C].

photochemical reaction in polluted atmosphere.

[D].

burning of domestic fuel.

Answer: Option B

Explanation:

No answer description available for this question.

Question: ‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a ‘particulate’ ?
[A].

Dust & mists

[B].

Smoke & fumes

[C].

Photochemical smog & soot

[D].

None of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called
[A].

fumes

[B].

mists

[C].

smoke

[D].

aerosols

Answer: Option D

Explanation:

No answer description available for this question.

Question: Ozone is
[A].

a primary pollutant.

[B].

a secondary pollutant.

[C].

impervious to ultra-violet rays.

[D].

both (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: Global warming may result in
[A].

flood

[B].

cyclone

[C].

decrease in food productivity

[D].

all (a), (b) and (c)

Answer: Option D

Explanation:

No answer description available for this question.

Question: Green house effect is accentuated by
[A].

deforestation.

[B].

rapid industrialisation.

[C].

increased transportation activity.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
[A].

global warming

[B].

green house

[C].

atmospheric effect

[D].

ionosphere

Answer: Option B

Explanation:

No answer description available for this question.

Question: On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because
[A].

of clotting of blood.

[B].

of jamming of respiratory tract.

[C].

it forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen.

[D].

it forms CO2 by combining with oxygen present in the blood.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Carbon monoxide is a pollutant, which causes
[A].

respiratory disease (e.g. asthma).

[B].

asphyxiation (suffocation) leading to death.

[C].

retardation in crop growth.

[D].

damage to building materials like marble.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In water chemical treatment plant, use of chloramines ensures
[A].

disinfection.

[B].

taste & odour control.

[C].

weed control in reservoirs.

[D].

removal of permanent hardness.

Answer: Option A

Explanation:

No answer description available for this question.