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Chemistry 9th Class English Medium Unit 10 Online Test MCQs With Answers

Question # 1

Global warming is because of

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Emission of ultraviolet radiations from the Earth's surface

Absorption of infrared radiations emitted by Earth's surface

Absorption of infrared radiations coming from the sun

Absorption of ultraviolet erdiations coming from the sun

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Question # 2

A pollutant is a waste material that pollutes.

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Water

Soil

Air

All of these

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Question # 3

The envelope of differente gases around the Earth is called.

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Biosphere

Hydrosphere

Atmosphere

Lithosphere

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Question # 4

Which gas is atmosphere acts as a glass wall of a green house.

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Carbon Di Oxide

Oxygen

Hydrogen

Sulphur Di Oxide

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Question # 5

Which gas is also known as life gas for plants.

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CO2

NO2

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Question # 6

Which substance remains unafaffected in the catalytic conerer fixed int he exhaust of the atutomobiles.

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NO2

CO2

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Question # 7

Which one of the following is not a green house effect?

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Increasing atmospheric temperature

Increasing sea level

Increasing flood risks

Increasing flood chains

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Question # 8

Which one of these pollutants are not found in car exhaust fumes.

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NO2

SO2

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Question # 9

Which gases contribute towards the formation of acid rain.

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Oxides of Both the oxides of nitrogen and sulfur

Oxides of carbon

Oxides of sulphur

Oxides of nitrogen

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Question # 10

Catalytic converters convert.

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CO to CO2

NO to N2

CO2 to CO

N2 to NO2

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Question # 11

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

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Iodine

Phosphorus

Sulphur

All of the above

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Question # 12

The pereceangage of SO2 released by the combustion of coal and petroleum products is.

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40%

80%

60%

70%

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