Tag: ozone layer depletion and causes

Questions Related to ozone layer depletion and causes

Cyclic variations of CO2CO2 concentration in the atmosphere are due to changes in

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. photosynthetic activity

  2. respiratory activity

  3. burning of fossil fuels

  4. action of infra-red rays

Show answer
Correct Option: C
Explanation:

The burning of fossil fuels such as gasoline, coal, oil, natural gas in combustion reactions results in the production of carbon dioxide. There are cyclic variations of Carbon dioxide concentration in the atmosphere due to this reason. 

So, the correct optionos 'Burning of fossil fuels'.

Which one of the following is major given house gas?

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Freon

  2. $CO _2$

  3. CFC

  4. $NO _2$

Show answer
Correct Option: B
Explanation:

greenhouse gases are those gases which absorb the heat or thermal infrared radiations of the sun and is responsible for an increase in the temperature of the earth's surface .there are several greenhouse gases that are produced either naturally or is being emitted in the atmosphere by a man-made source. The most abundant or major greenhouse gas is Carbon Dioxide.

so the correct answer is 'CO2'.

Increase in carbon dioxide in atmosphere is harmful because it

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. traps heat

  2. causes respiratory disorders

  3. forms smog

  4. increases turbidity

Show answer
Correct Option: A
Explanation:

Carbon dioxide is one of the most abundant and major greenhouse gas which entraps the heat and causes the rise in temperature of the earth surface hence is greatly responsible for global warming also.

so the correct answer is 'traps heat'.

Multiple Choice Questions
Which one is correct percentage of green house gases

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Methane - $20\%$, $N _2O $- $18\%$

  2. CFCs -$14\%$, Methane - $20\%$

  3. $CO _2$ - $40\%$, CFCs -$30\%$

  4. $N _2O$ - $6\%. $ $CO _2$ - $86\%$

Show answer
Correct Option: B
Explanation:

Relative concentration of various greenhouse gases in the atmosphere is as: CO$ _2$ (60%), CH$ _4$ (20%), CFCs (14%) and N$ _2$O (6%).

So, the correct answer is CFCs-14%, Methane 20%.

Identify the wrong statement/ statement from the following.
(1) ${ CO } _{ 2 }$ is released into the atmosphere through volcanic activity
(2)${ CO } _{ 2 }$ is released into the atmosphere through process of photosynthesis
(3)${ CO } _{ 2 }$ is released into the atmosphere through process of respiration
(4)${ CO } _{ 2 }$ is released into the atmosphere through process of forest fires


zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. 1 and 3

  2. only 2

  3. only 4

  4. 2 and 4

Show answer
Correct Option: B
Explanation:

Oxygen is released in the atmosphere through the process of photosynthesis. Carbon dioxide is released by different human activities like the burning of fossil fuels,  deforestation, burning of petrol etc.

So, the correct option is 'Only 2'.

The legally binding international agreement to reduce Greenhouse gases by 5% 2012 is ___________

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Vienna convention

  2. Montreal Protocol

  3. Kyoto Protocol

  4. Ozone Protocol

Show answer
Correct Option: C

Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the earth's atmosphere?

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Oxygen and nitrogen

  2. Nitrogen and carbon dioxide

  3. Ozone and oxygen

  4. Water vapor and carbon dioxide

Show answer
Correct Option: D

The gas responsible for the greenhouse effect on Venus is:

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Carbon dioxide $(CO _{2})$

  2. Oxygen $(O _{2})$

  3. Ozone $(O _{3})$

  4. Nitrogen $(N _{2})$

Show answer
Correct Option: A

Pick out the potent green house gas

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. $CO _{2}$

  2. $N _{2}O$

  3. $CH _{4}$

  4. $O _{3}$

Show answer
Correct Option: C

Green House effect is caused by

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Increase in $CO _{2}$

  2. Increase in $O _{2}$

  3. Decrease in $O _{2}$

  4. Decrease in $CO _{2}$

Show answer
Correct Option: A