Advertisements
Advertisements
Question
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Advertisements
Solution
Respiration and combustion are the processes which maintain the balance between oxygen and CO2 in the air.
- Respiration: Respiration is a chemical process that takes place in all living beings. In this process, oxygen present in the inhaled air reacts with the digested food material in the body. This results in the release of energy, carbon dioxide, and water.
- Combustion: Burning or combustion is a process in which a substance reacts chemically with oxygen and gets oxidised, with the release of energy in the form of heat and light. It is a fast process. During the process of burning, along with energy, carbon dioxide, and water vapour are also produced.
APPEARS IN
RELATED QUESTIONS
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Fill in the blank:
_____________ discovered the oxygen gas.
State four steps to be taken to control air pollution.
Fill in the blank
Although we cannot see air, we can ___it.
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
Tick (√) the correct alternative from the choice given for the following statement.
The substance which accelerates the speed of a reaction without itself undergoing any change is called
The capacity of air to hold moisture depends upon the ______ of the air.
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
Explain the following observations very briefly
A firki does not rotate in a closed area.
