Advertisements
Advertisements
प्रश्न
Give two uses of the following component present in air:
oxygen
Advertisements
उत्तर
Oxygen: For respiration and breathing no life is possible without oxygen. Oxygen is the most vital component which is responsible for two most important processes,
- Respiration and
- Combustion.
APPEARS IN
संबंधित प्रश्न
Fill in the blank:
_____________ discovered the oxygen gas.
Mention five causes of air pollution.
Name two air pollutants which affect our health.
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.
What will happen if the amount of water vapour in the air increases.
With whom should I pair up?
| Group A | Group B | ||
| (1) | Air | (a) | Excretion |
| (2) | Water | (b) | Scattering of light |
| (3) | Soil | (c) | Plasticity |
Which of the following statements is incorrect?
Wind does not help in the movement of which of the following?
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.
