Environmental Studies · Geography

Atmospheric Structure and Ozone

1,401 Questions

Atmospheric structure and ozone layer topics examine the Earth's atmospheric layers, the impact of solar radiation, and ozone depletion mechanisms. These environmental science concepts are crucial for general awareness sections in multiple competitive examinations. Review these questions to solidify your understanding of the stratosphere, polar vortex effects, and greenhouse gases.

Earth's atmospheric layersOzone layer depletionSolar ultraviolet radiationPolar vortex effectsCarbon dioxide impactOzone-depleting substances

Atmospheric Structure and Ozone Questions

Multiple choice

Ozone gas absorbs

  1. violet radiation

  2. ultra-violet radiation

  3. infra-red radiation

  4. none of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ozone gas absorbs ultra-violet radiation. It absorbs ultraviolet rays from the sun. Ozone is capable of absorbing infrared radiation coming from the planet and releases it during the evening hours. It is a greenhouse gas. 

Multiple choice

Which of the following statement is not true about Ozone?

  1. It is very vital for life on earth.

  2. It is formed in atmospheric air by the action of ultra-violet rays on atmospheric oxygen.

  3. It is an allotrope of oxygen.

  4. It is lighter than oxygen.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Ozone is heavier than oxygen.

Multiple choice

The Ozone layer absorbs

  1. radio waves

  2. cosmic rays

  3. ultra violet rays

  4. infra-red rays
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ozone layer in the Earth's stratosphere absorbs the majority of the sun's harmful ultraviolet (UV) radiation, protecting life on the surface.

Multiple choice

Ozone hole in the atmosphere is largely caused by the presence of

  1. Oxygen

  2. Hydrogen

  3. Chlorofluoro carbon

  4. Radioactive waste
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chlorofluorocarbons (CFCs) are stable compounds that reach the stratosphere, where they release chlorine atoms upon exposure to UV radiation. These chlorine atoms catalyze the destruction of ozone molecules, leading to the depletion of the ozone layer.

Multiple choice

Directions: For the Assertion (A) and Reason (R) below, choose the correct alternative from the following. Assertion: The Ozone layer present in the upper atmosphere of earth is beneficial for sustaining life on earth. Reason: The Ozone layer blocks the harmful ultraviolet rays from the Sun and thus protects life on earth.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are true but R is not the correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Both A and R are true, and R is the reason for A. Hence, option (1) is correct.

Multiple choice

Ozone is spread in the swimming pool because

  1. it acts as a disinfectant.

  2. it absorbs UV radiation

  3. oxygen is easily available from ozone

  4. All of the above

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ozone functions as both, an oxidant and disinfectant, in the treatment of drinking (potable) water .

Multiple choice

Ultraviolet radiation from sunlight causes a reaction that produces

  1. Fluorides

  2. Carbon monoxide

  3. Sulfur dioxide

  4. Ozone

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ozone is formed.Ozone far above us in the upper atmosphere (stratosphere) absorbs and protects us from deadly ultraviolet radiation. Ozone in the lower atmosphere, (troposphere) where we live is toxic.

Multiple choice

Ozone hole results in

  1. UV radiation reaching the earth

  2. cataract

  3. increase in skin cancer

  4. All of the above

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

UV rays can damage the eyes as more than 99% of UV radiation is absorbed by the front of the eyes. Corneal damage, cataract and macular degeneration are all possible chronic effects from UV exposure and can ultimately lead to blindness. Melanoma, a type of skin cancer, can also develop within the eye.

Multiple choice

Which of the following statements is correct?

  1. Ozone is a non-toxic gas.

  2. The ozone layer protects the surface of Earth from infrared rays.

  3. Ozone hole is a region of marked thinning of the ozone layer at high altitudes.

  4. Ozone is present in the mesosphere.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ozone hole is a region of marked thinning of the ozone layer at higher altitudes. It is a toxic gas and the ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation.