Question # 1

Global warming is mainly caused by ______ radiations

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UV

I.R

gama

X-rays

Transportation causes to produce CO₂ in atmosphere:

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72%

73%

74%

75%

The ozone depletion in the stratophere is mainly due to the reaction of ozone with

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Freons

CFCs

Both A and B

None

Lithosphere extends upto kilometer of earth crust in depth:

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10 km

100 km

1000 km

10000 km

Choose the correct statements

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SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

Water cover earth surface more than:

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50%

60%

70%

80%

Forms of waste products:

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Heat

Smoke

Solid

All of these

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

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50,000

10,000

20,000

None of these

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

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2 days

5 days

6 days

7 days

Ozone in stratosphere extends upto km:

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0-15 km

10-15 km

15-40 km

15-25 km

Fungicides are the pesticides which:

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Control the growth of fungus

Kills insects

Kills plants

Kill herb

Agriculture consumes part of fresh water:

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1%

2%

69%

23%

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

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Live stock wastes

Oil spilage

detergents

pesticides

The normal amount of overhead ozone is about in DU:

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150

250

350

450

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

The suspended particles in the raw water can be removed by the

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Coagulation

Aeration

Hydration

Dehydration

The amount of Si in the lithosphere is about

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27.72%

30.35%

35.30%

40.21%

The film forming components of paints are

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resins

thinners

pigments

driers

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

A large hole in the ozone layer over antarctica region was discovered in:

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1960s

1970s

1980s

1990s

The main pollutant of leather in the waste water is due to the salt of:

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Lead

Chromium (VI)

Copper

Chromium (III)

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