Tag: composition of air

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Questions Related to composition of air

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Nitrogen is not a supporter of:

  1. Combustion

  2. Decomposition

  3. Both A and B

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nitrogen is not a supporter of COMBUSTION.
Nitrogen is a colorless, odorless, tasteless diatomic gas. It is found in Group 15 of the periodic table. It does not burn, does not support combustion, and is only slightly soluble in water. It is relatively inactive chemically, but many of its compounds display marked reactivity.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

In solid state, nitrogen occurs as:

  1. Chile saltpeter

  2. Saltpeter

  3. Sal ammoniac

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

 In solid state, nitrogen occurs as chile saltpeter, saltpeter and sal ammoniac.
Chile saltpeter is sodium nitrate, $\displaystyle NaNO _3$.
Saltpeter is potassium nitrate, $\displaystyle KNO _3$
Sal ammoniac is ammonium chloride, $\displaystyle NH _4Cl$.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Air has________ composition with________ oxygen at high attitudes.

  1. fixed, less

  2. variable, less

  3. variable, more

  4. fixed, more
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Air has fixed composition with less oxygen at high altitudes. Air contains 78% nitrogen and 21% oxygen and less than 1% He, Ar, Ne and water vapor content. This composition remains fixed at all locations but the oxygen becomes less dense at high altitudes so it is difficult to breathe in such low concentration of air.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Rearing of silk worm is known as:

  1. Silviculture

  2. Sericulture

  3. Apiculture

  4. Horticulture
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Silviculture is growing and cultivation of trees.

Sericulture is production of silk and rearing of silkworms.
Apiculture is also called beekeeping.
Horticulture is the practice of garden cultivation and management.
Hence, option B is correct.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Which of the following statements is true regarding earth's atmosphere?

  1. It gets denser with increase in altitude

  2. It gets thinner with increase in altitude

  3. Its thickness is atleast one-fourth the radius of the earth.

  4. It contains no solid particles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The earth's atmosphere gets thinner with the increase in altitude. The earth's atmospheric layers are Troposphere, Stratosphere, Mesosphere, Ionosphere, and Exosphere. Each layer has its own importance. 

Option (B) is correct.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Mountaineers carry oxygen cylinders with them because :

  1. oxygen supports combustion

  2. air becomes thinner as we go higher

  3. air is denser as we go higher

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mountaineers carry oxygen cylinder along with them because when they climb mountains, as altitude increase, the amount of oxygen level in the atmospheric air decreases as trees are not found at higher altitude.


As a result, mountaineers suffer from dizziness. It can also lead to hypoxia.


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

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

It is not proper to breathe through our mouth because:

  1. the dust particles would enter our bodies

  2. more carbon dioxide will be inhaled

  3. our throat will become sore

  4. we will catch cold easily
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is not proper to breathe through our mouth because most of the dust particles can enter our body along with the air we breathe in. But breathing through nose does have this because nose has hair present which traps the dust particles.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

The correct ascending order of gases as per their composition in air is:

  1. oxygen< carbon dioxide <nitrogen< div=""></nitrogen<>

  2. hydrogen < oxygen < nitrogen

  3. nitrogen < hydrogen < oxygen

  4. nitrogen < oxygen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

By volume dry air contains $78.09\%$ Nitrogen, $20.95\%$ Oxygen, $0.93\%$ Argon, $0.04\%$ Carbon dioxide and small traces of other gases.


Ascending order of gases as per their composition in air is-

Hydrogen $<$ Oxygen $<$ Nitrogen