Tag: global environmental change

Quizzes (7) Questions (240)

Questions Related to global environmental change

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

Which one of the following gases can deplete ozone layer in the upper atmosphere?

  1. Ammonia

  2. Methane

  3. Carbon monoxide

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Methane can deplete ozone layer in the upper atmosphere. It acts as a greenhouse gas (a gas that traps heat from the sun within earth’s atmosphere) and it also attacks ozone. At low latitudes, methane in the stratosphere breaks down into hydrogen oxides, which attack reaching the ozone layer reacts with it and leads to the splitting of bonds between ozone.
So, the correct answer is option B.
Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Which one of the following diseases is caused due to ozone depletion on human?

  1. Huntington's chorea

  2. Small pox

  3. Plague

  4. Erythemia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Due to the ozone depletion, the UV rays are filtered in the Earth's atmosphere. 
  • This ray results in the development of various diseases. One of the common disorder is erythema. 
  • This is a disease in which there are reddening and swelling of the skin. There is swelling of the mucous membranes. 
  • There is an increase in the blood flow from the peripheral capillaries which results in inflammation.
  • Thus, the correct answer is option D. 
Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Which type of electron is present in free radical?

  1. Unpaired and extremely reactive

  2. Paired and extremely inactive

  3. Unpaired and extremely inactive

  4. Paired and extremely reactive
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Free radicals have unpaired electrons. These are extremely reactive. As one chlorine free radical can remove 11000 ozone molecules from stratosphere.

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

Pollutant likely to deplete ozone layer is?

  1. CO

  2. Nitrogen oxides

  3. Chlorofluorocarbons

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Nitrous oxide is stable at ground level and breaks down when it reaches the stratosphere to form nitrogen oxides, that trigger ozone-destruction. 
  • The main cause of ozone depletion are halocarbon refrigerants, such as chlorofluorocarbons (CFCs), HCFCs, halons).
  • So, the correct option is 'Both B and C'.
Multiple choice commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Ozone layer of upper atmosphere is being destroyed by

  1. Chlorofluorocarbon
  2. $SO _2$
  3. Photochemical oxidants/$O _2$ and $CO _2$

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

Ozone layer is formed in the stratosphere of the atmosphere by the action of UV rays on the oxygen molecules. This ozone layer acts as absorbant for the harmful UV radiations and so, these radiation do not cross the troposphere to reach the earth's surface. However, the ozone depleting pollutants like chlorofluorocarbons reach the stratosphere and break when exposed to the UV rays. This process releases the reactive chlorine which further reacts with ozone to form simple oxygen. That is how the ozone layer is depleted. Hence, the correct answer is 'Chlorofluorocarbons'.

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

Ultraviolet radiations from sunlight causes a reaction that produce.

  1. Fluorides

  2. Carbon monoxide

  3. Sulphur dioxide

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

Ultraviolet radiations cause photochemical splitting of oxygen molecules in the stratosphere. The nascent oxygen combines with molecular oxygen to form ozone. In troposphere nascent oxygen comes from nitrogen dioxide.

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

ODS means

  1. Ozone developing substance

  2. Ozone depleting substance

  3. Ozone data source

  4. Office data secrecy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

ODS refers to the ozone-depleting substances like chlorofluorocarbons, methyl bromide, methyl chloroform, carbon tetrachloride, hexaflurocarbons that release the chlorine and oxides of chlorine. These react with the UV rays and ozone to release the nascent oxygen. 

Hence, the correct answer is 'Ozone Depleting Substances'

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

Chief air pollutant which is likely to deplete ozone layer is ________.

  1. Sulphur dioxide

  2. Carbon dioxide

  3. Carbon monoxide

  4. Nitrogen oxides and fluorocarbons
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The ozone depleting substances include the chlorofluorocarbons, oxides of nitrogen, methyl bromide, carbon tetrachloride etc because these split up when exposed to UV radiations and release the reactive chlorine and bromine. These reactive species of chlorine and bromine then react with ozone to release the nascent oxygen. Sulphur dioxide and carbon dioxide are greenhouse gases. Carbon monoxide is an air pollutant.

Hence, the correct answer is 'Nitrogen oxides and fluorocarbons'.

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

Ozone depletion in stratosphere shall result in.

  1. Forest fires

  2. Increased incidence of skin cancer

  3. Global warming

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Ozone depletion in Stratosphere shall result in infiltration of UV A and UV B rays that would result in increased incidents of skin cancer
So, the correct answer is'Increased incidence of skin cancer'