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Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

What occurs when acidic oxides generated of carbon, nitrogen and sulphur due to burning of fossil fuels come in contact of rain?

  1. Acid rain

  2. Basic Rain

  3. Normal Rain

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

Acid rains are caused when the pollutants such as sulphur dioxide and nitrous oxide formed due to the burning of the fossil fuels are released in the atmosphere, where they travel upwards and mixes with oxygen, air and moisture to form pollutants called acidic oxide pollutants.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Which of the following is a wet deposition of acid rain?

  1. Fog

  2. Rain

  3. Snow

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Wet deposition is rain, sleet, snow, or fog that has become more acidic than normal. Wet deposition of acids occurs when any form of precipitation removes acids from the atmosphere and delivers it to the Earth's surface.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Rain, snow or fog, which is acidic in nature, is known as:

  1. acid rain

  2. acid snow

  3. acid fog

  4. all of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Acid rain includes any form of precipitation with acidic components from the atmosphere.

This can include rain, snow, fog, hail or even dust that is acidic.
This happens when oxides of sulphur and nitrogen that are emitted by the industries react with water and oxygen in the atmosphere to form sulphuric acid and nitric acid respectively.
These acids are responsible for the acidic nature of the rains. Their pH is usually between 5.5 to 5.
Thus, the correct answer is option (A).

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Which of the following gases related with acid rain?

  1. ${ NO } _{ 2 }$ and ${ CO } _{ 2 }$
  2. ${ CH } _{ 4 }$ and ${ SO } _{ 2 }$
  3. ${ CO } _{ 2 }$ and ${ SO } _{ 2 }$
  4. ${ SO } _{ 2 }$ and ${ NO } _{ 2 }$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

${ SO } _{ 2 }$ and ${ NO } _{ 2 }$:burning of fossil fuels releases oxides of sulphur and nitrogen, ${ SO } _{ 2 }$ and ${ NO } _{ 2 }$ reacts with water and oxygen and other chemicals to form sulphuric acid and nitric acid.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

 Acid rain happens because:

  1. sun leads to heating of upper layer of atmosphere

  2. the burning of fossil fuels release oxides of carbon, nitrogen, and sulphur in the atmosphere

  3. electrical charges are produced due to friction amongst clouds

  4. earth atmosphere contains acids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Acid rain is caused by emissions of acidic gases like sulphur dioxide, nitrogen and carbon oxides, which react with the water  molecules in the atmosphere to produce acids. 

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Assertion(A) : Rainwater normally has a $pH$ $= $ 5.6


Reason (R) : This is due to the presence of $H _{2}SO _{4}$ and $HNO _{3}$ produced from oxides of sulphur and nitrogen.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are true but R is not correct explanation of A.

  3. A is true and R is false.

  4. A is false and R is true
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Normal rain has a pH of about 5.6. This is because it reacts with carbon dioxide in the atmosphere and forms mildly acidic carbonic acid before it becomes rain.

Acid rains occur due to oxides of nitrogen and sulphur.

Nitric acid & sulphuric acid in the atmosphere dissolve in rainwater and come down to earth as acid rain. 

Acid rains have a pH 4.

Therefore, option C is correct