Question # 1

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

75% atmosphere mass lies in how many kilometers.

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11 km

30 km

50 km

85 km

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

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Oxygen

Carbon dioxides

sulphur dioxide

Hydrogen

Almost all aircrafts fly in:

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troposphere

mesosphere

stratosphere

themosphere

Building are being damaged by acid rain because it attacks.

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Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxalate

Atmosphere is divided into;

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3 regions

4 regions

5 regions

6 regions

The gas use by plants to perform photosynthesis.

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O₂

CO₂

N₂

CO

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

Ozone layer is not found is

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Upper stratosphere

Mid stratosphere

Lower stratosphere

All of them

Percentage of nitrogen in atmosphere is:

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20.94%

78.09%

0.93%

0.03%

Which one of the following is not air pollutant.

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CO₂

CO

NO₂

O₂

Ozone is an allotropic form of

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Carbon

Oxygen

Sulphur

Phosphorous

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.

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