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

Question # 1

ozone depletion (i.e O3--------------> O2 + O) occurs in:

Choose an answer

lower stratosphere

middle stratosphere

upper stratosphere

troposphere

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Question # 2

The layer above troposphere extend upto 50 kilometers called.

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Mesosphere

Hydrosphere

Stratosphere

Thermosphere

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Question # 3

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

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Question # 4

Which gas is in involved in ozone depletion?

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Nitrogen

CFC's

Chlorine

All of them

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Question # 5

What percentage of nitrogen and oxygen is in the atmosphere.

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69%

79%

89%

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Question # 6

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

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Question # 7

About 99% atmosphere's lies within:

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30 kilometre

35 kilometre

15kilometre

11 kilometre

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Question # 8

Higher concentration of CO causes.

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Fatique

Headache

Both of them

None of them

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Question # 9

The range of temperature in burning solid waste burning in incinerators is.

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650 ^oC - 1000 ^oC

650^oC - 11000^oC

1000^oC - 2000^oC

650^oC - 1000^oC

5000^oC - 1000^oC

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Question # 10

How many percentage of sunlight is absorbed by atmosphere gases.

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12%

18%

24%

30%

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Question # 11

Which is not a character of SO₂

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it is a colourless gas

It has irritating smell

It causes suffocation

It do not form sulphuric acid

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Question # 12

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 # 13

Almost all aircrafts fly in:

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troposphere

mesosphere

stratosphere

themosphere

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