Tag: ozone and its depletion

Quizzes (0) Questions (63)

Questions Related to ozone and its depletion

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

Biological importance of ozone layer is :

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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_________

  1. Carbon dioxide

  2. Hydrogen

  3. Ozone

  4. Nitrogen
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Biological importance of ozone layer is:

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. pesticides

  2. atomic explosions

  3. aerosols and high flying jet

  4. balloons
Reveal answer Fill a bubble to check yourself
C Correct answer
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.