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

Question # 1

The gas use by plants to perform photosynthesis.

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O₂

CO₂

N₂

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Question # 2

Infrared radiations emitted by the Earth are absorbed by.

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CO₂ and H₂O

N₂ and O₂

CO₂and N₂

O₂and CO₂

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Question # 3

In the troposphere (lowest layer), the temperature decreases form 17°C to;

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-58°C

-93°C

-61°C

-49°C

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Question # 4

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

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Question # 5

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

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Question # 6

Global warming causes rising of the sea level. The cause of global warming is.

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

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Question # 7

How much amount of sunlight reaches up to earth and absorbed:

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26%

32%

50%

18%

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Question # 8

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

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Question # 9

Which gas protects the Earth's surface from ultraviolet radiations?

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CO₂

N₂

O₃

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Question # 10

The sphere just above the Earth's surface is.

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Mescosphere

Stratosphere

Thermosphere

Troposphere

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Question # 11

In the bacterial decay, the compound of which element are emitted.

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Sulphur

Carbon

Nitrogen

All of them

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Question # 12

Fossil fuel means.

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Coal

Petroleum

Natural gas

All of them

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Question # 13

Depending upon temperature variation, atmosphere ins divided into how many regions?

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