Atmosphere

Q.

The diagram shows a vertical section through the human heart

Which structure separates oxygenated blood from deoxygenated blood?

1. A

2. C

3. D

4. B

Q.

The layer of air around earth is known as ___

Q.

Which of the following gases cause the harmful greenhouse effect?

1. Hydrogen

2. Nitrogen

3. Oxygen

4. Carbon dioxide

Q. Which layer protects the Earth from harmful UV rays coming from the Sun?

1. Inert gas
2. Ozone
3. Oxygen
4. Nitogen dioxide

Q. The percentage of nitrogen in the atmosphere is nearly:

1. 78%
2. 28%
3. 14%
4. 21%

Q. Which of the following gas supports combustion?

1. Argon
2. Oxygen
3. Nitrogen
4. Neon

Q. The percentage of nitrogen in air is

1. 0.1%
2. 54%
3. 78%
4. 21%

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

1. It contains no solid particles.
2. It gets thinner with an increase in the altitude
3. It remains the same.
4. It gets denser with an increase in the altitude

Q. Burning of fossil fuels release _______ gas along with heat and light.

1. argon gas
2. oxygen gas
3. hydrogen gas
4. carbon dioxide

Q. Which gas protects us from ultraviolet rays of the Sun?

1. Hydrogen
2. Nitrogen
3. Oxygen
4. Ozone