Tag: ozone and its depletion

Questions Related to ozone and its depletion

Biological importance of ozone layer is :

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. ozone layer stops ultraviolet rays

  2. ozone layer reduces green house effect

  3. ozone layer reflects radio waves

  4. ozone layer controls $O _2/H _2$ radio in atmosphere

Show answer
Correct Option: A
Explanation:

Ozone is an allotropic form of oxygen. 

It is too reactive to remain for long in the atmosphere at sea level.
At a height of about 20 kilometres, it is forrmed from the atmospheric oxygen in the presence of sunlight.
This layer protects us from the excessive concentration of U.V radiation.

A considerable part of harmful ultraviolet radiation from the sun does not reach the surface of the earth. This is because high above the earth's atmosphere is a layer of_________

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. Carbon dioxide

  2. Hydrogen

  3. Ozone

  4. Nitrogen

Show answer
Correct Option: C
Explanation:

The presence of the layer of ozone prevents the UV rays from reaching the surface of the earth.


The reactions that occur are shown below:
$O _{3}\overset{h\nu}{\rightarrow} O _{2} + [O]$
$2O _{3}\overset{h\nu}{\rightarrow} 3O _{2}$

Option C is correct.

Ozone layer is present in the :

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. troposphere

  2. stratosphere

  3. ionosphere

  4. ozonosphere

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Correct Option: B
Explanation:

The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometres (12 to 19 mi) above Earth.

_____ are cause depletion of the atmospheric ozone layer.

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. Chlorofluorocarbons

  2. $CO _2$

  3. $SO _2$

  4. none of the above

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Correct Option: A
Explanation:

Chlorofluorocarbons are cause depletion of the atmospheric ozone layer.

UV radiation increases the chances of ________ .

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. skin cancer

  2. lung cancer

  3. both $A$ and $B$

  4. none of the above

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Correct Option: A
Explanation:

UV is radiation increases the chances of skin cancer.

The allotrope of this element is the primary absorber of UV solar radiation in Earth's atmosphere. What element is this?

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. Carbon

  2. Nitrogen

  3. Oxygen

  4. Neon

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Correct Option: C
Explanation:

Ozone, an allotrope of oxygen is the primary absorber of UV solar radiation in earth's atmosphere.

Option $C$ is the correct answer.

Biological importance of ozone layer is:

zoology natural resources- air, water and land ozone - a case study stratospheric pollution ozone and its depletion

  1. it stops ultraviolet rays

  2. ozone layer reduces green house effect

  3. ozone layer reflects radio waves

  4. ozone layer controls $O _2/H _2$ ratio in atmosphere

Show answer
Correct Option: A
Explanation:

Ozone is $O _3$ present in stratosphere region of the atmosphere, which protects us by absorbing harmful Ultraviolet radiation released by the sun that causes a variety of health problems in humans, plants, and other animals which leads to the damage in ecosystems. Plants do not and grow in heavy ultraviolet radiation.

Hence option $A$ is correct.

Ozone layer of stratosphere requires protection from indiscriminate use of ____________ .

zoology allotropy of oxygen ozone - a case study stratospheric pollution ozone and its depletion

  1. pesticides

  2. atomic explosions

  3. aerosols and high flying jet

  4. balloons

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Correct Option: C
Explanation:

Ozone layer of stratosphere require protection from indiscriminate use of aerosols and high flying jet because they produce gases which react with ozone layer and depletion of ozone occurs.

Which one of the following is mainly responsible for depletion of ozone layer?

zoology allotropy of oxygen ozone - a case study stratospheric pollution ozone and its depletion

  1. Methane

  2. Carbon dioxide

  3. Water

  4. Chlorofluorocarbon

Show answer
Correct Option: D
Explanation:

Chlorofluorocarbon is responsible for the depletion of ozone layer.

UV radiation from sun causes a reaction that produces _____________ .

zoology allotropy of oxygen ozone - a case study stratospheric pollution ozone and its depletion

  1. carbon oxide

  2. sulphur dioxide

  3. fluorides

  4. ozone

Show answer
Correct Option: D
Explanation:

UV radiation from the sun on reaction produces ozone.