Question # 1

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destory

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50,000

10,000

20,000

None of these

The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title

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Solid waste management

Waste management

Solid management

Semisolid management

Pan is an irritant to human beings and it affects

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Eyes

Nose

Hair

Skin

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

Ozone is an allotropic form of:

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Carbon

Phosphorus

Oxygen

Sulfur

Chose a point which is not included in the components of environment

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Stratosphere

Hydrosphere

Lithosphere

Biosphere

Which of the following waster material is not recycled for use again

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paper

plastic

hides of animals

glass

Primary pollutants are:

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oxides of sulphur

oxides of carbon

oxides of nitrogen

All of these

A single chloride free redical can destroy bow many ozene molecules?

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100

100000

10000

10

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

46.60%

50.50%

Why is carbon monoxide called as pollutant? The reason is that

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It combines with oxygen

It combines with haemoglobin

It inactivates glycolysis

It inactivates nerves

The normal amount of overhead ozone is about in DU:

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150

250

350

450

Atmosphere consists of gasses:

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N₂

O₂

Ar

All

Air pollution causes

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Acid rain

O₃ depletion

Green House Effect

All

Electropositive character increases down the groups due to:

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Increase in atomic size of the elements

Decrease in ionization potential

Decreases in electromagnetically of the element

All the above

Phenomenon of acid rains gain importance in:

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1930s

1940s

1950s

1960s

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

Sea gets polluted bu accidental oil spills and

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Atmospheric pressure

Nitrogen gas

Cargo oil tankers

Aero plane

Which is not an air pollutant

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N₂

CO

NO

N₂O

In purification of potable water the coagulant used is:

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Nickel sulphate

Copper sulphate

Barium sulphate

Aluminium sulphate

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