Question # 1

75% atmosphere mass lies in how many kilometers.

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11 km

30 km

50 km

85 km

Acid rain damages the building it is due to reaction on.

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Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxilat

A pollutant is a waste material that pollutes.

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Air

Water

Soil

All of them

Ultraviolet radiations can causes.

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Hepatitis

Asthma

Skin cancer

Night blindness

A group of gases that maintains temperature of atmosphere is.

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Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

Almost all air crafts fly in which reion?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Depending upon temperature variation, atmosphere ins divided into how many regions?

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1

2

3

4

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

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Precipitates

Residue

Crystals

All of them

Carbon monoxide is harmful to us because.

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It paralyses the lungs.

It damages lungs tissues.

It reduces oxygen carrying ability of haemoglobin

It makes the blood coagulate.

Infrared radiations emitted by the Earth are absorbed by.

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CO₂ and H₂O

N₂ and O₂

CO₂and N₂

O₂and CO₂

The range of temperature in burning solid waste burning in incinerators is.

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650 ^oC - 1000 ^oC

650^oC - 11000^oC

1000^oC - 2000^oC

650^oC - 1000^oC

5000^oC - 1000^oC

What gas is the major constituent of troposphere?

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Nitrogen

Oxygen

Hydrogen

Both a and b

A strange bitter smell noticed near photocopiers is of:

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SO2

H2S

O2

O3

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