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प्रश्न
Fill in the blank
Air is a ______ of gases
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उत्तर
Air is a mixture of gases
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संबंधित प्रश्न
What was the ancient belief regarding the nature of matter ?
Name three greenhouse gases.
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
Name a device which uses wind energy to generate electricity.
______ is important for all living creatures.
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.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
