Advertisements
Advertisements
प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
पर्याय
only oxygen
only nitrogen
only carbon dioxide
all of these
उत्तर
all of these
APPEARS IN
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 |
Fill in the blank:
_____________ discovered the oxygen gas.
How is air useful to scooters and cars.?
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
How is light scattered by the air?
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Draw a neat labelled diagram for the following experiment.
To determine the component of air used up in burning, by using phosphorus and a bell jar.
______ is important for all living creatures.
Cool and soothing wind: Breeze.
uproot trees wind: ______.
