Main Components

Q.

What is the shortest route that can be taken by the blood travelling from a leg to an arm in the human body?

1. Leg → heart → lungs → heart → arm

2. Leg → heart → lungs → liver → arm

3. Leg → liver → heart → lungs → arm

4. Leg → liver → stomach → heart → arm

Q.

The most abundant constituent of air is ____.

1. Impurities

2. water vapour
3. oxygen
4. nitrogen

Q. Which of the following are constituents of air?

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

Q.

The second most abundant constituent of air is:

1. Nitrogen

2. Water vapour

3. Oxygen

4. Carbon dioxide

Q.

The most abundant constituent of air is _____.

1. Oxygen

2. Nitrogen

3. Water vapour

4. Impurities

Q. Which of the constituents of air on increasing, causes global warming?

1. Nitrogen
2. Oxygen
3. Inert gases
4. Carbon dioxide

Q. Which of the following gas is used to fill the packets of potato chips?

1. Oxygen
2. Carbon dioxide
3. Hydrogen
4. Nitrogen

Q. Identify the constituents of air.

1. Oxygen
2. Arsenic
3. Nitrogen
4. Glass
5. Carbon dioxide
6. Water vapours
7. Benzene
8. Dust
9. Smoke

Q. Existence of which of the following is supported by Oxygen.

1. Human beings
2. Aquatic animals
3. Stones
4. Plants
5. Wood
6. Fire
7. Birds
8. Glass

Q. Arrange the following gases in the decreasing order of its abundance in air.

1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Helium