Question # 1

Incineration is a process in which solid waste is burned at high temperature ranging from

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500 to 600°C

900 to 1000°C

1000 to 1100°C

600 to 700°C

Lead pollution is mainly due to

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Metallic pollution

Space pollution

Acid rain

Cd pollution

Leather tanneries use big auantities of:

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Cr Vi salts

Cr III salts

Mn-salts

Pb-salts

Water is made disinfectant during purification of water to the step:

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aeration

coagulation

chlorination

treatment

Which one of the following does not act as pollutant

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Carbon monoxide

Sulphur dioxide

Hydrocarbons

Carbon dioxide

Site of land for landfill is selected based upon.

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topography

location of ground

water table

All of these

Pathogens in raw water are killed in step:

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aeration

coagulation

chlorination

treatment

Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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Which gases are produced from landfills?

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NH₃

H₂S

N₂

All of these

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

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1960s

1970s

1980s

1990s

Nitrogen percentage in atmosphere is:

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76%

77%

78%

79%

Exposure to CO results in

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Headche

Fatigue

Unconsciousness

All of these

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds

Oxides of sulphur react in atmosphere by various reactions to form:

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sulphates

sulphites

sulphides

sulphate aerosols

Which of the following does not contribute towards the formation of photochemical smog?

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NO

SO₂

O₃

Hydrocarbons

What is the morality of a solution containing 15g of urea is 500cm³ of solution?

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1M

0.5M

2M

1.5M

Requirement of macronutrient per acre of the land is

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5 to 200 kg

20-200 kg

200-400 kg

30-400 kg

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

How much pesticides have been synthesized at present?

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Four thousand

Six thousand

Eight thousand

Ten thousand

Part of fresh water consumed in industry is:

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1%

2%

69%

23%

Ozone is effectively removed by

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TNT

CFCs

PVC

CNG

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