Tag: air as a natural resource

Questions Related to air as a natural resource

The largest reservoir of nitrogen on Earth is 

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Soil

  2. Air

  3. Oceans

  4. Rocks

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Correct Option: B

Rising air cools by this process:

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Expansion

  2. Evaporation

  3. Compression

  4. Condensation

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Correct Option: A

Sinking air warms by this process:

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Compression

  2. Expansion

  3. Condensation

  4. Friction

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Correct Option: A

How many grams of air in a liter?

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. 1.5 gm

  2. 1.3gm

  3. 1.2gm

  4. 7gm

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Correct Option: B

Which of the following statement is true?

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. Hot air expands on heating.

  2. Hot air contracts on cooling.

  3. Cold air contracts on heating.

  4. None of the above.

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Correct Option: A
Explanation:
Air is a mixture which is composed of several gases like oxygen 21%, nitrogen 78%, carbon dioxide 0.03% and water vapors. The air molecules are held by strong intermolecular forces. When air is heated up, the air molecules absorb the heat and the intermolecular forces between the air molecules become weak and its kinetic energy increases. The air molecules move apart and become less dense and thus they expand on heating.
So, the correct answer is option A.

Choose the correct answer from the alternatives given.
The largest reservoir of nitrogen on earth is:

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. soil

  2. oceans

  3. air

  4. granite rocks

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Correct Option: C
Explanation:

It is true that 70% or so of the Air is nitrogen but that it needs to be the largest reservoir. Nitrogen is an essential part of most living organisms. Most of the bodily fluids and enzymes have nitrogen in a bonded form. This is true even in the case of plants. So, the correct answer is "Air".

Suppose two unsaturated air masses mix horizontally. The resulting mixture cannot possibly be saturated.

evs atmosphere- wind importance of oxygen is air present everywhere around us? air as a natural resource

  1. True

  2. False

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Correct Option: B

Ozone hole means :

chemistry air around us importance of oxygen is air present everywhere around us? air as a natural resource

  1. thinning of the ozone layer

  2. a large sized hole in ozone layer

  3. small hole scattered in the ozone layer

  4. thickening of ozone in ozone layer

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Correct Option: A
Explanation:

"Ozone hole" means thinning of the ozone layer.


The ozone hole is not technically a “hole” where no ozone is present but is actually a region of exceptionally depleted ozone layer.

Hence the option A is correct.

Choose the correct answer form the alternatives given.
Scuba divers are at high risk due to high concentration of dissolved gases while breathing air at high pressure under water. The tanks used by Scuba divers are filled with :-

chemistry air around us importance of oxygen is air present everywhere around us? air as a natural resource

  1. Air diluted with helium

  2. 02

  3. N

  4. A mixture of nitrogen and helium

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Correct Option: A

The nitrogen molecules present in the air can be converted into nitrates and nitrites by :

chemistry air around us importance of oxygen is air present everywhere around us? air as a natural resource

  1. nitrogen fixation

  2. carbon fixation

  3. industries in the form of by ctprodu

  4. cereal plants

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Correct Option: A
Explanation:

The nitrogen molecules present in the air can be converted into nitrates and nitrites by nitrogen fixation.


Hence the option A is correct.