Advertisements
Advertisements
प्रश्न
In a number of musical instruments, air plays an important role. Can you name some such instruments?
उत्तर
Such instruments are flute, mouth organ, trumpet, shehnai and harmonium.
APPEARS IN
संबंधित प्रश्न
Name two air pollutants which cause global warming.
Write ‘true’ or ‘false for the following;
Air is a compound.
Tick (√) the correct alternative from the choice given for the following statement.
Which of the following is not a greenhouse gas?
State what do you understand by the term ‘air’. Explain its importance to mankind.
Name the following.
Inert gases in the air
State the meaning of the term Air
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
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% |
Cool and soothing wind: Breeze.
uproot trees wind: ______.
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.
Why did the tiny bubbles appeared?
