Tag: chemistry

Questions Related to chemistry

In which layer, most of the atmospheric air is present?

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

  1. Troposphere

  2. Stratosphere

  3. Mesosphere

  4. Thermosphere

Show answer
Correct Option: A
Explanation:

Fifty percent of the total mass of the atmosphere is located in the lower $5-6$ $km$ of the troposphere. Nearly all atmospheric water vapour or moisture is found in the troposphere. So, it is the layer where most of the earth's weather takes place.

Which of these gases is an atmospheric pollutant?
1 carbon monoxide
2 nitrogen dioxide
3 sulfur dioxide.

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

  1. $1$ only

  2. $2$ only

  3. $3$ only

  4. $1, 2$ and $3$

Show answer
Correct Option: D
Explanation:

Solution:- (D) $1, \; 2$ and $3$

These all gases are atmospheric pollutants as all lead to air pollution.
coz  of
Nitrogen dioxide (NO2), sulfur dioxide (SO2), and carbon monoxide are important ambient air pollutants. High-intensity, confined space exposure to NO2 has caused catastrophic injury to humans, including death. Ambient NO2 exposure may increase the risk of respiratory tract infections through the pollutant's interaction with the immune system. Sulfur dioxide (SO2) contributes to respiratory symptoms in both healthy patients and those with underlying pulmonary disease. Controlled human exposure studies have demonstrated that experimental SO2 exposure causes changes in airway physiology, including increased airways resistance. Both acute and chronic exposure to carbon monoxide are associated with increased risk for adverse cardiopulmonary events, including death. However, studies have not demonstrated a clear dose-dependent health risk response to increasing amounts of these pollutants except at high concentrations. In addition, a number of studies examining the effects of ambient level exposure to NO2, SO2, and CO have failed to find associations with adverse health outcomes.

The pollutant in air responsible for acid rain is carbon monoxide.

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

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Acid rain is caused by a chemical reaction that begins when compounds like sulphur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain. Sulphur dioxide and nitrogen oxides dissolve very easily in water and can be carried very far by the wind. As a result, the two compounds can travel long distances where they become part of the rain, sleet, snow, and fog that we experience on certain days.
Hence, The pollutant in air responsible for acid rain is sulphur dioxide and nitrogen oxides.

Non-metal oxides such as sulphur dioxide and nitrogen oxide are responsible for:

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

  1. ozone depletion

  2. water pollution

  3. acid rain

  4. all of the above

Show answer
Correct Option: C

Smog is well known for:

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

  1. irritation in the eye

  2. inflammation in the tissue of lung

  3. pain in chest

  4. all of these

Show answer
Correct Option: D
Explanation:

Smog is well known for causing irritation in the eye. It may also result in inflammation in the tissues of lungs, giving rise to pain in the chest.

Smog is a/an :

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

  1. air pollutant

  2. water pollutant

  3. noise pollutant

  4. land pollutant

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Correct Option: A

 A thick fog-like layer in the atmosphere, especially during winters it is called:

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

  1. smoke

  2. smog

  3. dust

  4. none of the above

Show answer
Correct Option: B
Explanation:

Smog is a thick fog-like layer in the atmosphere, especially during winters, made up of fog and smoke. 


Sulphur dioxide is mainly produced by burning fuels such as coal. It causes respiratory problems, including permanent lung damage.

Hence, the correct option is $\text{B}$

A mixture of various gases with dust and water vapour is known as:

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

  1. smoke

  2. smog

  3. dust

  4. fog

Show answer
Correct Option: B
Explanation:

Smog can be defined as a mixture of various gases with dust and water vapour.

Which of the following is affected by acid rains?

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

  1. Infrastructure

  2. Aquatic life

  3. Plants

  4. All of the above

Show answer
Correct Option: D
Explanation:

Buildings are eroded by acid rains. When acid rain makes way into lakes, rivers it affects the aquatic life and affects the forests by affecting the minerals uptake of the plants.

Acid rain is a mixture of:

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

  1. sulphuric acid with hydrochloric acid and nitric acid with nitrous acid

  2. sulphuric acid with sulphurous acid and nitric acid with hydrochloric acid

  3. sulphuric acid with sulphurous acid and nitric acid with nitrous acid

  4. sulphuric acid with nitrous acid and nitric acid with sulphurous acid

Show answer
Correct Option: C
Explanation:

When oxides of sulphur and nitrogen emitted by the industries, react with the moisture present in the atmosphere they form acids.

The acids formed by sulphur oxides are sulphuric acid with sulphurous acid and the acids formed by nitrogen oxides are nitric acid with nitrous acid.
These acids are responsible for the acidity of rains. The pH of acid rain is 5.5
Thus, the correct answer is option (C).