Uses of Oxygen

Q.

The source of oxygen for the aquatic animals is ________.

1. water

2. soil

3. air

4. land

Q.

Which of the following process requires oxygen?

1. Expiration
2. Both (A) and (B)
3. Inspiration
4. Inspiration and combustion

Q.

46 (b) Suggest two processes which put back carbon dioxide into the air.

Q.

Which of these processes releases oxygen into the air?

1. respiration

2. photosynthesis

3. burning

4. all of these

Q.

Explain how the balance of oxygen in the air is maintained though it is used for respiration and combustion.

Q. Which gas helps in the survival of fishes underwater?

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

Q.

Select the uses of Oxygen.

1. For combustion

2. Bleaching

3. As an oxidant in rocket fuels.

4. Artificial respiration.

Q.

Which of the following is/are the uses of oxygen?

1. Combustion

2. Bleaching

3. As an oxidant in rocket fuels

4. Artificial respiration

Q. Which among the given options are the uses of oxygen?

1. Respiration
   
2. Photosynthesis
   
3. Combustion
   
4. Rocket fuel
   

Q.

what normal percentage composition of gases in the inspired and expired air respectively ?

Q.

Which among the given options is the use of oxygen?

1. Chlorofluorocarbons

2. As a refrigerant

3. An oxidant in rocket fuel

4. In the manufacture of nitrogen fertilizers