Tag: causes of resource depletion

Questions Related to causes of resource depletion

Chlorofluorocarbons cause

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

  1. Global warming

  2. Eutrophication of lakes

  3. Depletion of the ozone layer

  4. Magnification in the food chain

  5. Acid rain

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Correct Option: C
Explanation:
Chlorofluorocarbons (CFC) also known as freons which cause a destruction of ozone layer found in the stratospheric layer. The ozone layer in the atmosphere prevents the harmful UV rays from reaching the earth surface. When this ozone layer gets depleted, harmful UV rays causes skin cancer. 

Which of the following is the result of use of chlorofluorocarbons?

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

  1. Global warming

  2. Eutrophication of lates

  3. Depletion of the ozone layer

  4. Magnification in the food chain

  5. Acid rain

Show answer
Correct Option: C
Explanation:

A chlorofluorocarbon (CFC) is composed of carbon, chlorine, and fluorine. This is used in refrigerants, propellants, and solvents. The chlorine atoms are released due to splitting of CFC by ultravoilet radiation.

So, the correct answer is option C.

Ozone in the stratosphere is depleted by

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

  1. $C _6F _6Cl _6$

  2. $C _7F _{16}$

  3. $CF _2Cl _2$

  4. $C _6F _6$

Show answer
Correct Option: C
Explanation:

The presence of CFCs in the atmosphere results in the depletion of the ozone layer. The chemical formula of this substance is CF$ _2$Cl$ _2$. They are used as coolants in refrigerators, coolers, etc. The CFCs causes the breaking of the ozone molecule which forms the oxygen radical and O$ _2$. The depletion of the ozone layer results in the penetration of the harmful UV radiations from the sun into the Earth's atmosphere. 

Thus, the correct answer is option C. 

Good ozone is found in 

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

  1. Atmosphere

  2. Biosphere

  3. Stratosphere

  4. Ozonosphere

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Correct Option: C
Explanation:

The correct answer is Stratosphere. Option C

Ozone occurs in the Earth's upper atmosphere—10 to 30 miles above the Earth's surface and protects from the sun's harmful ultraviolet (UV) rays Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules.

Which one of the following chemicals is responsible for the reduction of ozone content of atmosphere?

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

  1. Hydrochloric acid

  2. Photochemical smog

  3. Chlorofluorocarbon (CFC)

  4. Sulphur dioxide

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Correct Option: C
Explanation:

Chlorofluorocarbons or Chlorofluoromethane are also known as freon or aerosols. They are chemicals used as refrigerants, propellants and solid plastic foams. These chemicals are also released as aerosols by jets flying at high altitudes. Along with nitrogen oxides, chlorofluorocarbons react with ozone of ozonosphere and depletes the same. Chlorofluorocarbons release reactive chloride which directly reacts with ozone molecules setting a chain reaction.

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

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

  1. Ammonia

  2. Methane

  3. Carbon monoxide

  4. None of the above

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Correct Option: B
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.

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

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

  1. Huntington's chorea

  2. Small pox

  3. Plague

  4. Erythemia

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Correct Option: D
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. 

The Pollutant responsible for Ozone depletion is 

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

  1. $CFCs$

  2. $MIC$

  3. $CO _2$

  4. $SO _2$

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Correct Option: A

Which type of electron is present in free radical?

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

  1. Unpaired and extremely reactive

  2. Paired and extremely inactive

  3. Unpaired and extremely inactive

  4. Paired and extremely reactive

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Correct Option: A
Explanation:

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

Pollutant likely to deplete ozone layer is?

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

  1. CO

  2. Nitrogen oxides

  3. Chlorofluorocarbons

  4. Both B and C

Show answer
Correct Option: D
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'.