Question # 1

The major constituents of troposphere are:

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carbon dioxide and argon

nitrogen and oxygen

argon and oxygen

carbon dioxide and oxygen

Which pollutant is responsible for changing weather?

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Air pollutant

Water pollutant

Soil pollutant

All of them

In shoe polished, which chemical is used.

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Ethanol

Methanol

Carbon black

Formaldehyde

Reactions which have comparable amounts of reactants and products at equilibrium state have:

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very small Kc value

Very large Kc value

Moderate Kc value

None of these

Which salt cause permanent hardness in water is:

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Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

Thermosphere lies beyond.

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Stratosphere

Troposphere

Mesosphere

Biosphere

The stratosphere layer is at height above the earth's surface.

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0-12 km

12-50 km

50-85 km

65-120 km

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Which disease cause when humans use water of industrial effluents.

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Cancer

Asthma

Jaundice

cholera

The pH of water containing CO₂ is

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4-6

5.6-6

6-7

7-8

Building are being damaged by acid rain because it attacks.

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Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxalate

Which is disaccharide?

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Glucose

Fructose

Sucrose

Starch

What is the pOH of Ca(OH)2, 0.02 M Solution.

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1.698

1.397

12.31

12.61

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