Tag: planet earth

Quizzes (17) Questions (116)

Questions Related to planet earth

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

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

  1. i only

  2. ii only

  3. iii only

  4. i and iii only

  5. i, ii and iii
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. Electrical power generation using coal

  2. Earthquakes

  3. Air pollution

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

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

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

  1. hydrocarbons

  2. inorganic compounds

  3. sulphates

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

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

What is so important about the troposphere?

  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
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

$SO _2$ is known to produce acid rain.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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}$

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

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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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.