Question # 1

Fossil fuel means.

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Coal

Petroleum

Natural gas

All of them

The gas use by plants to perform photosynthesis.

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O₂

CO₂

N₂

CO

The recombination of O and O₂ in mid stratosphere is an

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Exothermic reaction

Endothermic reaction

Heat absorbing process

None of these

Iron and steel structure are damaged by.

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Carbon monoxide

Sulphur dioxide

Methane

Carbon dioxide

The pH of acid rain.

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2

3

4

5

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

Ozone has a smell

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Bitter

Rotten egg

Sweat

None of them

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

Cause of global warming is:

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CO₂gas

SO₂gas

NO₂gas

O₂gas

Ultraviolet radiations can causes.

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Hepatitis

Asthma

Skin cancer

Night blindness

What gas is the major constituent of troposphere?

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Nitrogen

Oxygen

Hydrogen

Both a and b

On which base atmosphere is divided into four regions?

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Change in pressure

Change in rediation

Change in temperature

Change in volume

The pH of water containing CO₂ is

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4-6

5.6-6

6-7

7-8

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Chemistry 10th Class English Medium Unit 14 Online Test MCQs With Answers

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