Question # 1

In purification of potable water the coagulant used is

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Nickle sulpahte

Copper sulpahte

Barium sulpahte

Alum

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 reaction to take place

Air must be blowing swiftly

There must be SO₂in the air

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

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Fullerences

Freons

Polyhalogens

Ferrocene

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

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Combining with oxygen to form carbon dioxide

Destruction of hemoglobin

Preventing reaction between oxygen and hemoglobin

Forming stable compound with hemoglobin

The 95.5% mass of Lithosphone is made of 11 elements i.e. O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. which element is present in trace amount

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Iodine

Bromine

Lead

Carbon

Acid rains are produced by

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Excess NO₂and SO₂from burining fossil fuels

Excess production of NH₃by industry and coal gas

Excess release of carbon monoxide by incomplete combustion

Excess formation of CO₂by combustion and animal respiration

Which of the following forms a toxic substance in blood by combing with hemoglobin?

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Carbon dioxide

Carbon monoxide

Oxygen

Methane

Which factor is helping to reduce the environmental pollution

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Rapid growth of population

Urbanization

Industrialization

Increase of plantation

Increased asthmatic attacks in certain seasons are related to

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Inhalation of seasonal pollen

Eating of seasonal vegetables

Low temperature

Wet and dry environment

Depletion of ozone layer is due to

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Oxides of nitrogen

Oxides of carbon

Oxides of sulphur

None of the above

NO and NO₂gases in atmosphere are represented by

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NO

NO₄

NO_x

N_xO_y

Classical smog occurs in palces of

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Excess SO₂

Low temperature

High temperature

Excess NH₃

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

Potable water is considered to be

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Safe for human consumption

Not safe for human consumption

The surface water

The ground water

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphuric oxide

Which of the following is not an air

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N₂

N₂O

NO

CO

The % of CO₂is the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

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Live stock waste

Agricultural pesticides

Oil breaks and spills

All of the above

Ozone hole is maximum over

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Europe

Antarctica

Asia

Africa

Mottling of teeth is due to presence of an element in drinking water

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Mercury

Fluorine

Boron

Chlorine

Atomospheric pollutant is

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CO₂

CO

O₂

N₂

A pollutant affects

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Human health

Quality of life

Functioning of ecosystem

All of these

The film forming components of paints are

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Resins

Thinners

Pigments

Driers

Which one is not a pollutant normally?

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Hydrocarbons

Carbon dioxide

Carbon monoxide

Sulphur dioxide

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

Eutrophication causes reduction in

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Dissolved hydrogen

Dissolved oxygen

Dissolved salts

All the above

The pH of the rain water in areas where acid rain is the cause of pollution may be

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6.5

5.6

4.5

2.2

Ozone depletion in stratosphere shall result in

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Forest fires

Increased incidence of skin cancer

Global warming

None of the above

Domestic waste mostly constitutes

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Non-biodegradable pollution

Biodegradable pollution

Effluents

Air pollution

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ECAT Chemistry Chapter 27 Environmental Chemistry Online Test MCQs With Answers

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