Tag: causes of greenhouse effect

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Questions Related to causes of greenhouse effect

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Peeling of ozone umbrella is due to

  1. CFCs

  2. PAN
  3. $CO _2$

  4. Coal burning
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Among the five layers of the earth's atmosphere, ozone is present in the stratosphere which absorbs UV radiation before it reaches the ground. The main cause of ozone depletion is manufactured chemicals especially CFCs, these compounds reach the stratosphere by winds, where they release halogen atoms through photodissociation and cause the breakdown of ozone into oxygen. The ozone hole formed due to this increase the exposure of direct UV rays on earth carrying the potential risk of skin cancer and other negative effects

So, the correct answer is 'CFCs'

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Chlorofluorocarbons are responsible for

  1. Acid rain

  2. Ozone layer depletion

  3. Global warming

  4. Thermal inversion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ozone is found in high concentration in the stratosphere of the earth's surface in the form of ozone blanket or commonly known as the ozone layer. The vital function of ozone is to absorb the sun's ultraviolet radiation before it reaches the ground hence protecting the earth from its harmful effect. But the ozone-depleting substance such as Chlorofluorocarbons, nitrous oxides, etc that reacting with the ozone layer by releasing the reactive chlorine and cause depletion of it forming ozone hole. The concentration of ozone is less than 220 DU in the hole.

Hence, the correct answer is 'Ozone layer depletion'.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Number of ozone depleters identified by Viena convention for Protection of Ozone Layer (1992) is

  1. 19

  2. 17

  3. 15

  4. 13
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The Vienna Convention for the Protection of the Ozone Layer is a multilateral environmental agreement signed in 1985.
  • It provided frameworks for international reductions in the production of chlorofluorocarbons due to their contribution to the destruction of the ozone layer and the resulting increase in the threat of skin cancer.
  • The Number of ozone depleters identified by Viena convention for Protection of Ozone Layer (1992) is 19.
  • So, the correct answer is '19'.
Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Nitrogen oxides released in the stratosphere cause ozone depletion due to

  1. Catalysing conversion of ozone to oxygen

  2. Binding ozone

  3. Reacting with ozone

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Nitrogen oxide which causes ozone depletion is Nitrous oxide. It is similar to CFCs in that it is stable when it is released in the troposphere but when it reaches stratosphere, it releases ozone depleting substances which react with ozone and cause its degradation through nitrogen-oxide catalysed reaction.
So, the correct answer is 'Reacting with ozone'. 
Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

$O _3$ in ozone layer is formed by action of

  1. IR radiation

  2. Blue radiation

  3. UV radiation

  4. Other radiations
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Ozone molecule (O3) is formed in the stratosphere in presence of UV radiations.
The first step is the breaking of an oxygen molecule into two oxygen atoms by UV radiation:
                                       UV
                             O3---------------> O + O
The Oxygen atoms then combine with oxygen molecule to form a molecule of ozone:
                           O2 + O -----------------> O3
So, the correct answer is 'UV radiation'.
Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Multiple Choice Questions
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers.

  1. Methane

  2. Nitrous oxide

  3. Ozone

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

Ozone is a triatomic gas that forms a shield or layer in the stratosphere region of atmosphere. This layer protects the living beings from harmful effects of UV-B rays of 280-320 nm. Depletion of the ozone layer can lead to an increased incidence of skin cancer.

So the correct  option is 'ozone'.

Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Melanornia (skin cancer) is associated with

  1. ozone accumulation

  2. ozone depletion

  3. acid rain

  4. allergens
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ozone depletion allows more harmful UV radiation to reach Earth's surface, which damages skin cells and increases the risk of melanoma (skin cancer). Ozone accumulation would have the opposite effect, while acid rain and allergens are not directly linked to skin cancer.