Tag: planet earth

Questions Related to planet earth

In the gases below, which would react with rain water to produce acid rain?
i. CFCs
ii. Methane
iii. Carbon dioxide

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

  1. i only

  2. ii only

  3. iii only

  4. i and iii only

  5. i, ii and iii

Show answer
Correct Option: C
Explanation:

Carbon dioxide would react with rainwater to produce acid rain.


The reaction of carbon dioxide with water gives carbonic acid.

$\displaystyle CO _2 + H _2O \rightarrow H _2CO _3 $

  • Hence the correct option is C.

Which is among the greatest contributors to gaseous pollutions that are responsible for acidic rain?

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

  1. Electrical power generation using coal

  2. Earthquakes

  3. Air pollution

  4. All of the above

Show answer
Correct Option: A
Explanation:

The principal cause of acid rain is sulfur and nitrogen compounds from human sources, such as electricity generation, factories, and motor vehicles. Electrical power generation using coal is among the greatest contributors to gaseous pollutions that are responsible for acidic rain. The gases can be carried hundreds of kilometers in the atmosphere before they are converted to acids and deposited.

Photochemical smog is the chemical reaction of sunlight, nitrogen oxides and volatile ________ compounds in the atmosphere, which leaves airborne particles and ground-level ozone.

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

  1. hydrocarbons

  2. inorganic compounds

  3. sulphates

  4. carbonates

Show answer
Correct Option: A
Explanation:

Photochemical smog is the chemical reaction of sunlight, nitrogen oxides and volatile organic compounds in the atmosphere, which leaves airborne particles and ground-level ozone.
Hence option A is the correct answer.

Which of the following is/are type(s) of smog?

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

  1. Classical smog

  2. Photochemical smog

  3. Both $A$ and $B$

  4. None of the above

Show answer
Correct Option: C
Explanation:

Smog is two types:-
1) Classical smog is also called as London smog or sulphurous acid smog.
2) Photochemical smog is also called as Los angles smog.

What is so important about the troposphere?

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

  1. Layer of water at or near Earths surface

  2. Contains ozone

  3. It contains weather and the oxygen that we breath

  4. All of the above

Show answer
Correct Option: C
Explanation:

The troposphere is the lowest portion of earth's atmosphere and is also where all weather takes place. It contains approximately 75% of the atmosphere's mass and 99% of its water vapour and aerosols.

Classical smog is also called as________.

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

  1. London smog

  2. sulphurous acid smog

  3. Both $A$ and $B$

  4. Los angles smog

Show answer
Correct Option: C
Explanation:

Smog is two types:
1) Classical smog is also called as London smog or sulphurous acid smog.
2) Photo chemical smog is also called as Los angles smog.

$SO _2$ is known to produce acid rain.

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

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

$ {S}{O} _{2} $ produces acid rain. It reacts with atmospheric oxygen to produce $ {S}{O} _{3} $. This sulphur trioxide reacts with water to produce Sulphuric Acid. Thus acid rain is produced.

$ {2}{S}{O} _{2} $ ${+}$ $ {O} _{2} $ ${=}$ $ {2}{S}{O} _{3} $
$ {S}{O} _{3} $ ${+}$ $ {H} _{2}{O} $ ${=}$ $ {H} _{2}{S}{O} _{4}$

Photochemical smog is also called as____________.

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

  1. London Smog

  2. sulphurous acid smog

  3. Both $A$ and $B$

  4. Los angles smog

Show answer
Correct Option: D
Explanation:

Smog is two types:
1) Classical smog is also called as London smog or sulphurous acid smog.
2) Photochemical smog is also called as Los angles smog. 
Hence option D is correct.

Acid rain contains:

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

  1. sulphuric acid

  2. nitric acid

  3. hydrochloric acid

  4. all of the above

Show answer
Correct Option: D
Explanation:

The main constituents of acid rain are sulphuric acid and nitric acid. Hydrochloric acid is also present in acid rain in small amount.

'Smog', which means 'smoke' plus 'fog', irritates eyes and the throat. Smog is mainly caused by pollutants from automobiles and industries when they:

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

  1. hit a dense shower of snow flakes

  2. react photochemically, due to the effect of ultraviolet light

  3. form a smoke ring

  4. react with oxygen in the air due to lightning electrical discharge from clouds

Show answer
Correct Option: B
Explanation:
Smog is especially common from automobile exhaust. A chemical reaction between solar ultraviolet radiation and an atmosphere polluted with hydrocarbons and oxides of nitrogen causes photochemical smog.