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प्रश्न
What is global warming?
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उत्तर
The increased greenhouse effect is caused due to increase in air pollutants and it results in the average increase in temperature of the atmosphere. This is called Global warming.
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संबंधित प्रश्न
What was the ancient belief regarding the nature of matter ?
Fill in the blank:
_____________ discovered the oxygen gas.
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 observation balloons. | (b) carbon acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Write the chemical name of Lime water
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
What is meant by ozone depletion?
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
State the meaning of the term Air
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
Cool and soothing wind: Breeze.
uproot trees wind: ______.
