Question # 1

What is the cause of water pollution

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Chemical and bacterial constants in live stock

The spilled oil in rivers and ponds

Wide spreads used of pesticides

All of these

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

The percentage of SO₂ produced by volcanoes is:

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47%

57%

67%

77%

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

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Biochemistry

Physically chemistry

Pharmaceutical chemistry

Environmental chemistry

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

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

How much pesticides have been synthesized at present?

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Four thousand

Six thousand

Eight thousand

Ten thousand

SO₂makes ___________ acid rains

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carbonic acid

Sulfuric

Nitric acid

All of these

Chemical equilibrium involving reactants and products in more than one phase is called:

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Homogeneous

Heterogeneous

Dynamic

Static

Synthetic organic pesticides formulated nowadays are more then:

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One thousand

Ten thousand

Two thousands

Twenty thousand

Ozone layer is high:

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20-23 km

22-25 km

23-26 km

25-28 km

Elements in lithosphere exist generally as:

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metals

non-metals

metalloids

minerals

Organic pollutants in water are measured by

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DO

COD

Water logging

PH

Which is used as a coagulant:

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Ferric salts

Potash alum

a and b both

Chlorine

Fresh water of total earth water is:

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1%

2%

3%

4%

In the atmosphere, O₂is about

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10%

15%

21%

25%

SO₂produced by volcanoes is about

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75%

67%

69%

70%

Chlorofluorocarbons and aerosols are inert in sphere:

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troposphere

stratosphere

lithosphere

hydrosphere

The scope of environmental chemistry is to study:

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Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

Chemicals used to kill herbs are:

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Herbicides

Insecticides

Pesticides

Fungicides

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

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Glasses

Paper

Plastic toys

Hides of animals

99.5% mass of lithosphere is made of

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03 elements

8 elements

11 elements

15 elements

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

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benzene

minerals

hydrocarbons

phenols

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

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Live stock wastes

Oil spilage

detergents

pesticides

Suspended matter is settled in purification of water by:

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aeration

coagulation

chlorination

treatment

The yellow color present in the photo chemical smog is due to presence of the

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Carbon dioxide

Nitrogen dioxide

Chlorine

All

Which of the following is not a heavy industry?

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Iron

Fertilize

Paper

None

Residence time of methane in the atmosphere is

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3 - 7 days

2 -3 days

3 - 7 years

2 - 3 years

Chemicals used to kill pests are:

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Herbicides

Insecticides

Pesticides

fungicides

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

Leaching of nutrients is due to

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Drying of soil

Combustion of soil

Acidification of soil

Neutralization of soil

Natural water is

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Pure

Impure

Acts as solute

Distilled

In water the most important oxidizing agent is dissolved molecular oxygen which ranges form

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2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

Poisoning of CO can be reveresed by giving oxygen at pressure:

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low

least

medium

High

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

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