Question # 1

Ozone is a gas having boiling point

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Unstable

High

Low

Moderate

Volcanoes produce SO₂:

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47%

57%

67%

77%

Soil remediation means

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to make it suitable for cultivation of crops

to make it acidic

to make it alkeline

to add manure into it

Which is not the condition for the formation of smog

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there must be sufficient NO gas

there must be sunlight to help photo chemical reactions to take place

air must be blowing swifty

there must be SO₂in the air

An excellent source of energy without causing pollution is

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Fossil fuel

Sun

Petroleum

Nuclear reactor

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

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Atmosphere

Hydrosphere

Lithosphere

All of these

Atmosphere consists of gasses:

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N₂

O₂

Ar

All

Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water

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live stock waste

oil leaks and spills

disposal of industrial effluents

rain

Ozone is present in layer around earth:

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atmosphere

tropospher

stratosphere

thermosphere

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⁺

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

Reason of pollution are:

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Population and urbanization

Transportation

Industrialization

All of these

Lanthanides an actinides belong to following group of periodic table:

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IB

VIIIB

IIB

IIIB

Polar ice caps can melt due to

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Acid rain

Green House Effect

Smog

Chlorofluorocarbons

Synthetic organic pesticides formulated nowadays are more then:

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One thousand

Ten thousand

Two thousands

Twenty thousand

Industrial effluents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

Water is purified by:

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Filtration

aeration

coagualation

All of these

How much quantity of water is in the domestic use

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0.08%

16%

24%

90%

Petroleum or crude oil is a complex mixture of compounds mainly:

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benzene

minerals

hydrocarbons

phenols

Which factor is helping to reduce the environmental pollution

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Urbanization

Industrialization

Increase of plantation

Rapid growth of population

The process of coagulation can remove suspended solids in raw water about

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50%

60%

Less than 40%

More than 80%

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