Advertisements
Advertisements
प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Air pollution is due to the
विकल्प
cutting of green plants
gases like carbon monoxide, sulphur dioxide, etc.
smoke given out by factories
all of the above
Advertisements
उत्तर
all of the above
APPEARS IN
संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
What do you observe when a burning candle is covered with an inverted jar.
Give two uses of the following component present in air:
water vapour
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
While freezing, the ______ of water is lowered.
What is the importance of air in transmission of sound?
The layer of air around the earth is known as ______.
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
About 78% of the volume of air is ______.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
The ______ makes the windmill rotate.
