What is the purpose of Ozone layer? 1. Protects UV rays to reach on earth 2. Helps UV rays to reach earth

Monjur Alahi

What is the purpose of Ozone layer?

1. Protects UV rays to reach on earth

2. Helps UV rays to reach earth

3. The source of ozone is the oxygen in the atmosphere

Choose the correct code

(a) 1 and 2 (b) 2 and 3 (c) 1 and 3 (d) 1, 2, 3


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(c) The source of ozone is the oxygen in the atmosphere. Ozone layer protects the living being from the UV radiation which reaches the earth.

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Which part of electromagnetic spectrum is absorbed from sunlight by ozone layer?

Ozone layers absorbs ultraviolet rays.

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Indonesian forest fire in 1997 was caused by : (a) greenhouse effect (b) depletion of ozone layer

(d) The Indonesian forest fire in 1997was caused by slash and burn technique of agriculture.

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(d) A is not correct but R is correct.

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Write the name of substance. Which is responsible for ozone layer depletion ?

Chlorofluorocarbons (CFC)

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(d) Neither 1 nor 2

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Green house effect is warming due to (a) infra-red rays reaching earth (b) moisture layer in atmosphere

(c) The mean global temperature rise by 2° – 6°c and the concentration of carbon dioxide increases in the troposphere upto 600 ppm. Hence, the surface of the earth becomes...

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Ozone layer in the outer atmosphere helps in: I. Reflecting radio waves and makes radio communication possible

The Right option is : (b) Only II

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Which statement is correct regarding Ozone Hole? I. Ozone destruction rate is equal to the its formation rate

(b) II & III

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Which statement is not true regarding Ozone? I. Ozone is covered under Montreal Protocol.

The Right option is : (c) Only IV

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Consider the following statements regarding Ozone: I. Ozone contributes to 3-7% of Greenhouse effect

(d) Ozone contributes to 3-7% of Greenhouse effect. The largest net source of tropospheric ozone is influx from the stratosphere. Large amounts of ozone are also produced in the troposphere...

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