Composition of Air

Q.

Which of the following is the most abundant gas in the earth’s atmosphere?

1. Carbon dioxide

2. Nitrogen

3. Oxygen

4. Hydrogen

Q. 672ml of ozonised oxygen at NTP were form to weight 1gm. Calculate volume of ozone in the ozonised oxygen.

Q.

Air is a gaseous mixture.

1. True

2. False

Q.

1. Briefly state the importance of following constituents of air :

(a) Oxygen

Q.

Air is a mixture of various gases. One of the gases is 21% of the air and is essential for the survival of human beings. This gas is:

1. Nitrogen

2. Oxygen

3. Ozone

4. Argon

Q.

Air has only 0.03 % volume of ___________, but it is very important for the world.

Q. What is the composition of oxygen by volume in the atmosphere?

1. 21%
2. 31%
3. 17%
4. 26%

Q. Arrange the following process of formation of H₂SO₄ on the planet Venus in the sequence of occurrence.

I.The reaction of Sulphur dioxide with atomic oxygen to form Sulphur trioxide.

II.Sun's photochemical action on carbon dioxide to form carbon monoxide and atomic.

III.The reaction of Sulphur trioxide with water to form sulphuric acid.

1. II, I, III
2. III, II, I
3. I, II, III
4. II, III, I

Q.

How can we liquify gases?

1. Lowering both pressure temperature

2. Increasing both pressure and temperature

3. Lowering pressure and increasing temperature

4. Increasing pressure and lowering temperature

Q.

What is the percentage of oxygen present in the atmosphere?

1. 17%

2. 21%

3. 26%

4. 31%

Q. The percentage of oxygen in the atmosphere is _________.

1. 27
2. 23
3. 19
4. 21

Q.

Air is not present in _____.

1. Ocean

2. Buildings

3. Vacuum

4. Caves

Q. Which of the following are constituents of air?

1. Oxygen
2. Water vapour
3. Carbon dioxide
4. Nitrogen

Q. Along with gases, air also contains water vapour and dust.

1. True
2. False

Q.

Air is a gaseous mixture.

1. Carbon dioxide

2. Automobile exhaust

Q. What is the percentage of nitrogen in the atmosphere?

1. 8 %

2. 28 %

3. 78 %

4. 98 %

Q.

The most abundant gas in the air is ___.

1. oxygen

2. neon

3. helium

4. nitrogen

Q.

Air is not present in _____.

1. Buildings

2. Ocean

3. Caves

4. Vacuum

Q. Example of natural zeolite?

Q.

___ is the most abundant element in the earth's crust.

1. Carbon

2. Hydrogen

3. Oxygen

4. Nitrogen