Question # 1

Which of the following is not a secondary pollutant

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Ozone

Carbonic acid

Sulphuric acid

Carbon dioxide

Which is not a component of environment?

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Biosphere

Lithosphere

Hydrosphere

None of these

How much quantity of total water is available as fresh water

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3%

1%

10%

21%

Volcanoes produce SO₂:

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47%

57%

67%

77%

Oxides of sulphur react in atmosphere by various reactions to form:

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sulphates

sulphites

sulphides

sulphate aerosols

Out of total amount of water available for human use is

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0.30%

0.2%

40%

50%

Lithosphere extends upto kilometer of earth crust in depth:

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10 km

100 km

1000 km

10000 km

Ozone in stratosphere extends upto km:

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0-15 km

10-15 km

15-40 km

15-25 km

Which is not an air pollutant

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N₂

CO

NO

N₂O

To purify water which has mud dissolved in it, a substance which coagulates the suspended particles is used.

The coagulant may be

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Ag⁺

Cu²⁺

Al³⁺

Si⁴⁺

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg Toxic.

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

The pH range of the acid rain is

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6.5 - 6

Less than 5

8 - 7.5

7 - 6.5

Which gas is not a constituent of atmosphere?

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Xe

O₃

H₂

F₂

Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil

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diffusion

convection

electrophoresis

chromatography

Which is the following is true about galvanic cell:

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Reduction occurs at cathode

Reduction occurs at anode

Anode is negatively charged

Chathode is positively charged

Hard water can block radiators due to formation of

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Insoluble calcium and magnesium salts

Insoluble sodium salts

In soluble phosphate salts

Insoluble potassium salts

Ozone is most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:

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Live stock wastes

Oil spilage

detergents

pesticides

The bonding occurs among polar covalent molecules containing H and one of the small electronegative element such as O,F or N is called:

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Ionic bonding

Metallic bonding

Bridge bonding

H-bonding

What change in plants indicates toxic effect of SO₂

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Weathering of leaves

Darkening of leaves

Falling of leaves

Bleaching of leaves

Which one of the following does not act as pollutant

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Carbon monoxide

Sulphur dioxide

Hydrocarbons

Carbon dioxide

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