Uses of Constituents of Air

Q.

What is a cryogenic agent?

Q.

Which component of air is commonly used in fire extinguishers?

1. Argon

2. Oxygen

3. Carbon dioxide

4. Nitrogen

Q.

Atmospheric oxygen is used by living beings for

Q. How do plants and animals help each other in exchange of gases in the atmosphere?

Q.

Which component of air is essential for fertilisers?

1. Nitrogen

2. Oxygen

3. Argon

4. Carbon dioxide

Q.

Explain how ${\mathrm{CO}}_2$ is able to control fires.

Q.

Why is carbon dioxide preferred in fire extinguishers to put out fire in multi-storey hospitals?

Q.

What are the basic requirements of all life forms?

Q. Nitrogen is not a supporter of combustion. Then why isn't it used in fire extinguishers????

Q. Why nitrogen is more than oxygen and carbon dioxide even tho it is not useful? Why

Q.

Dry ice is used in refrigeration of food items.

1. True
2. False

Q.

Dry ice can be used as a refrigerant.

1. True

2. False

Q.

Nitrogen is needed by plants for the manufacture of proteins.

1. Coke

2. Coal tar

Q. Which of the following gases can be used as a preservative?

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

Q. Which gas is used in a waste water treatment plant to disinfect the water?

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

Q.

Explain how ${\mathrm{CO}}_2$ is able to control fire

Q. What are the uses of nitrogen?

Q.

…….gas is used in fire extinguishers.

Q. What are the characteristics of a good fertilizer?

Q. How is the balance of oxygen and carbon dioxide maintained in air?

Q.

We continuously breathe oxygen and also the population is rising at an alarming rate. So why is the oxygen not fully used up?

1. Once oxygen is consumed, we can breathe other gases.

2. Oxygen mixed with other gases is used as an alternative when there is a shortage of pure oxygen.

3. The plants take carbon dioxide and releases oxygen while animals take oxygen and releases carbon dioxide, so the balance is maintained.

4. The Earth's atmosphere has a large reservoir of oxygen.

Q.

Carbon dioxide is used in fire extinguishers. Give reason.

Q.

Hydrogen balloons are used to study the weather.

1. True
2. False

Q.

Dry ice is the solid form of __________.

1. water
2. carbon dioxide
3. iron
4. nitrogen

Q. Match the given gases with their uses.

1. 
2. Carbon dioxide
3. Nitrogen
4. 
5. Oxygen
6. 

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.

Why Carbon dioxide is used in fire extinguisher?

Q.

Define the following.

Dry ice

Q.

What is the importance of Nitrogen for plants?

Q.

Plants use nitrogen in the form of:

1. Nitric oxides

2. Nitrous oxides
3. Nitrites
4. Nitrates