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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
पर्याय
is a slow process
is a natural and continuous process
takes place at body temperature
all of the above
उत्तर
all of the above
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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 |
Discuss harmful effects of greenhouse effect.
Give two uses of the following component present in air:
water vapour
State four steps to be taken to control air pollution.
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
A mixture has a variable composition. Give three other reasons why air is considered a mixture and not a compound.
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Cool and soothing wind: Breeze.
uproot trees wind: ______.
Wind does not help in the movement of which of the following?
In the boxes of Column, I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II
| Column I | Column II | ||
| (a) | DILLMWIN | (a) | |
| (b) | YNOGXE | (b) | |
| (c) | MESKO | (c) | |
| (d) | TUDS | (d) | |
