Tag: causes of resource depletion

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Questions Related to causes of resource depletion

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.

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

What does high flying crafts deplete?

  1. Atmosphere

  2. Ozone Layer

  3. Biosphere

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

High-flying aircraft, particularly supersonic jets, release nitrogen oxides and other pollutants directly into the stratosphere. These substances catalyze the breakdown of ozone molecules, leading to the depletion of the ozone layer.

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

What does a single chlorine free radical destroy?

  1. Ultraviolet radiations

  2. Atmosphere

  3. Biosphere

  4. Ozone layer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chlorine free radicals act as catalysts in the stratosphere, where they react with ozone (O3) to form oxygen (O2) and chlorine monoxide. This process destroys ozone molecules, which is the primary cause of ozone layer depletion.

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

Depletion of ozone layer published in scientific journals, in

  1. 1950s

  2. 1990s

  3. 1970s

  4. 1980s
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Scientific evidence regarding the depletion of the ozone layer, particularly the role of CFCs, gained significant attention and was widely published in the 1980s following the discovery of the Antarctic ozone hole in 1985.