Question # 1

An excellent source of energy without causing pollution is

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Fossil fuel

Sun

Petroleum

Nuclear reactor

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

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

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects:

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Eyes

Ears

Stomach

Nose

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

Heat balance of earth is maintained by

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Atmosphere

Hydrosphere

Lithosphere

Stratosphere

The film forming components of paints are

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resins

thinners

pigments

driers

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

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paper

plastic

hides of animals

glass

Water cover earth surface more than:

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50%

60%

70%

80%

Ozone gas has boiling point:

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Low

High

Medium

Highest

Forms of waste products:

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Heat

Smoke

Solid

All of these

Rigid rocky crust earth upto a depth of 100 km is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Global warming is mainly caused by ______ radiations

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UV

I.R

gama

X-rays

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

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environment

hydrosphere

pollutant

biosphere

Which of spectral lines when atoms are subjected to strong electric field is called:

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Compton effect

Stark effect

Zeeman effect

Photoelectric effect

Smaller unit of biosphere is:

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specie

ecosystem

plankton

troposphere

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

By the mid of 1980s depletion of total overhead ozone in antarctic region is

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20%

30%

40%

50%

Half of the mass of atmosphere is concentrated above earth at the hieght of

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40 Km

25-28 Km

5-6 Km

100 Km

How many times a newspaper can be recycled

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02

05

08

10

Which is property of CO?

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Soluble in water

Insoluble in water

No toxic

Pole coloured

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