Question # 1

The pH of water containing CO₂ is

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4-6

5.6-6

6-7

7-8

The impurities associated with the minerals are known as:

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Metallurgy

Ores

Gangue

Compounds

The % age of carbon in peat is :

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60%

70%

80%

90%

Atmosphere has regions.

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One

Two

Three

Four

A group of gases that maintains temperature of atmosphere is.

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Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

What is pOH of 0.01 M solution of HCl?

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1

4

12

13

Which one of the following compounds is an aldehyde?

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CH₃-CH₂-OH

CH₃-COOH

CH₃CHO

CH₃COCH₃

How many % age of nitrogen in urea fertilizers?

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40.6

45.6

46.6

50

Which one of the following is not a greenhouse Effect?

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Increasing atmosphere temperature.

Increasing food chains

increasing flood risks

Increasing sea-level

The reaction goes from left to right , if:

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Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

By which process alkenes are prepared from alcohols:

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Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

Petroleum fraction having composition C₅ to C₇ is.

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Petroleum Gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

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