Tag: environmental impact: global warming

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Questions Related to environmental impact: global warming

Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

The two gases making the highest relative contribution to the greenhouse gases are:

  1. $CO _{2}$ and $CH _{4}$
  2. $CH _{4}$ and $N _{2}O$
  3. $CFC{s}$ and $N _{2}O$
  4. $CO _{2}$ and $N _{2}O$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Highest contribution to green house gases are $CO _2 $  $60$% and $CH _4$  $20$% which absorbs more of the infrared rays and UV rays and causes global warming.  

Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Identify the non-Green House Gas (GHG) from the following

  1. Methane

  2. Nitrous oxide

  3. Sulphur hexafluoride

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

Carbon monoxide is a colorless, odorless, and tasteless gas that is slightly less dense than air. Carbon Monoxide and other reactive gases Carbon monoxide (CO) is not considered a direct greenhouse gas, because it does not absorb terrestrial thermal IR energy strongly enough. 

Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Greenhouse gas is produced if oxygen is combined with :

  1. $\displaystyle Na$
  2. $\displaystyle S$
  3. $\displaystyle { H } _{ 2 }$
  4. $\displaystyle Ne$
  5. $\displaystyle C$
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

$C + O _2 \rightarrow CO _2$
$CO _2$ is a green house gas, which act as blanket in earth atmosphere, and cause Green house effect.
Green House Effect:
The Earth gets energy from the sun in the form of sunlight. The Earth's surface absorbs some of this energy and heats up. That's why the surface of a road can feel hot even after the sun has gone down—because it has absorbed a lot of energy from the sun. The Earth cools down by giving off a different form of energy, called infrared radiation. But before all this radiation can escape to outer space, greenhouse gases in the atmosphere absorb some of it, which makes the atmosphere warmer. As the atmosphere gets warmer, it makes the Earth's surface warmer, too.

Multiple choice chemistry environment environmental impact: global warming green house effect geobiochemical cycle

The purest form of water that is considered to be ________.

  1. tap water

  2. water from wells

  3. bore water

  4. rain water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Rain water is considered the purest form of water. 

Impurities and salts present in water on earth are left behind during vapourization by the sun. 

These minerals and micro-organisms are present in ground water resources such as tap, well, bore.

herefore, option D is correct.
Multiple choice chemistry environment environmental impact: global warming green house effect geobiochemical cycle

Natural water is:

  1. spring water

  2. river water

  3. rain water

  4. well water
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation
Natural water is defined as the water that is:
1. obtained directly from underground sources
2. has natural origin from evaporation and condensation of sea water
or melting of glaciers.
This includes all natural sources of water such as river, lakes, spring, rain, well water.
option A,B,C,D are correct.