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प्रश्न
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
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उत्तर
A candle burns in ajar of oxygen, but gets extinguished in nitrogen.
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संबंधित प्रश्न
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 |
State two similarities and two differences between respiration and burning.
Name two air pollutants which affect our health.
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.
Photosynthesis is a process in which plants
Tick (√) the correct alternative from the choice given for the following statement.
Which of the following is not a greenhouse gas?
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
The capacity of air to hold moisture depends upon the ______ of the air.
How is light scattered by the air?
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Air is a ______ of some gases.
