Advertisements
Advertisements
Question
State four steps to be taken to control air pollution.
Advertisements
Solution
Four steps are taken to control air pollution:
- Tall chimneys are installed in factories and powerhouses so that smoke and gases rise high and get diluted.
- GROW more tall trees to absorb CO2 Also plants help in bringing rains.
- Use unleaded petrol and CNG in all public transport vehicles
- Industries should be located far away from residential areas.
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 |
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
What is greenhouse effect?
Define the following:
Respiration
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Tick (√) the correct alternative from the choice given for the following statement.
Air pollution is due to the
Tick (√) the correct alternative from the choice given for the following statement.
Rust is
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
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
The ______ makes the windmill rotate.
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
