Question # 1

Out of total amount of water available for human use is

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0.30%

0.2%

40%

50%

Elements in lithosphere exist generally as:

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metals

non-metals

metalloids

minerals

Property due to which water acts as a universal solvent is

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Polarity

It's ability to make hydrogen bond

Both A and B

Strong dipole dipole interaction

SO₂and NO₂cause pollution due to increase in

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Buffer action

Basicity

Acidity

Neutrality

The temperature of in the incineration of industrial and hazardous waste process has range

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

Water cover earth surface more than:

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50%

60%

70%

80%

Ecology is a science of environment and deals specially with

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stratosphere

biosphere

lithosphere

hydrosphere

Augus smith discovered in the mid of seventeenth century:

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acid

Base

Acid rain

Fertilizer

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

SO₂makes ___________ acid rains

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carbonic acid

Sulfuric

Nitric acid

All of these

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

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Eyes

Ears

Stomach

Nose

How much quantity of total water is available as fresh water

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3%

1%

10%

21%

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

A single free chlorine redical can destroy ozone molecules upto:

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100000

100

1000

10000

Chemicals used to kill pests are:

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Herbicides

Insecticides

Pesticides

fungicides

Lead pollution is mainly due to

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Metallic pollution

Space pollution

Acid rain

Cd pollution

Ozone in stratosphere extends upto km:

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0-15 km

10-15 km

15-40 km

15-25 km

Dissolved impurities of potable water can be separated by the process of

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reduction

Aeration

Electrolysis

Co-angulation

Leather tanneries use big auantities of:

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Cr Vi salts

Cr III salts

Mn-salts

Pb-salts

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

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

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