Question # 1

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

Almost all aircrafts fly in:

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troposphere

mesosphere

stratosphere

themosphere

Ultraviolet radiations can causes.

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Hepatitis

Asthma

Skin cancer

Night blindness

The gas used by animals to perform respiration.

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O₂

N₂

SO₂

Cl₂

The solid particle deposit on the filter paper during filtratin is called.

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Precipitates

Residue

Crystals

All of them

Which pollutant is not found in car exhaust gases?

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CO

O₃

NO₂

SO₃

Just above the Earth's surface is

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Mesosphere

Stratosphere

Theremosphere

Troposphere

Which gas acts as a glass wall of a green house?

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Oxygen

Carbon dioxides

sulphur dioxide

Hydrogen

Infrared radiation emitted by the earth are absorbed by?

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CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

Which one of the following is not an air pollutants?

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Nitrogen

Carbon dioxide

Nitrogen oxide

Ozone

The recombination of O and O₂ in mid stratosphere is an

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Exothermic reaction

Endothermic reaction

Heat absorbing process

None of these

pH of acid rain is:

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7-5

6-7

1-2

4-5

Which is not a part of flue gas?

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Furans

Dioxins

HCl

H₂SO₄

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