Question # 1

SO₂Makes ______ acid rains

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Carbonic acid

Sulfuric

Nitric acid

All of these

Shahi Qilla may be destroyed by

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Flood in Ravi

Temperature mediated spoilage of marble

Air pollutants from Lahore chemical industries

All the above

Ecosystem is a smaller unit of

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

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

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2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

The % of CO₂is the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Drawback DDT as presticide is

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I becomes ineffective after some time

It is less effective than others

It is not easily/rapidly degraded in nature

Its high cost

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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SO₂

NO₂

CO

A and b only

Atomospheric pollutant is

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CO₂

CO

O₂

N₂

Spraying of DDT produces pollution of

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Air

Air and water

Air and soil

Air, water and soil

Polycyolic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

56.60%

50.50%

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

In the atmosphere, O₂is about

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10%

15%

21%

25%

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

Which causes water pollution?

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Smoke/fly ash

Automobile exhausts

Aeroplnes

2,4-D and pesticides

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

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Mercury

Lead

Nitrogen oxide

Sulphuric oxide

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

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10,000

20,000

100,000

50,000

The toxic organic compounds and heavy metals and metalloids results in contamination of

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Surface water

Ground water

Both surface and ground water

Neither surface nor ground waters

Water pollution is mainly due to

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Sulphure dioxide

Carbon dioxide

Oxygen

Industrial discharges

Increasing skin cancer and high mutation rate are due to

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Acid rain

Ozone depletion

CO pollution

CO₂Pollution

The film forming components of paints are

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Resins

Thinners

Pigments

Driers

Water is often treated with chlorine to

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Increase oxygen content

Kill germs

Remove hardness

Remove suspended particles

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

Biodegradable pollutant is

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Plastic

Asbestos

Sewage

Mercury

A pollutant affects

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Human health

Quality of life

Functioning of ecosystem

All of these

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

Which of the following is not an air

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N₂

N₂O

NO

CO

Ozone hole refers to

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Hole in ozone layers

Reduction in thickness of ozone layer in stratosphere

Reduction of thickness of ozone in troposphere

Increase concentration of ozone

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

The amount of Si in the lithosphere is about

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27.72%

30.35%

35.30%

40.21%

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