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प्रश्न
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.
पर्याय
helium
hydrogen sulphide
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उत्तर
Hydrogen sulphide is an example of a pollutant present in the air.
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संबंधित प्रश्न
What is greenhouse effect?
What is wind?
Mention five causes of air pollution.
Name two air pollutants which cause acid rain.
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.
Respiration
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
The layer of air around the earth is known as ______.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Why did the tiny bubbles appeared?
