Advertisements
Advertisements
Question
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
Options
True
False
Solution
False
Explanation:
because air occupies space.
APPEARS IN
RELATED QUESTIONS
What was the ancient belief regarding the nature of matter ?
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 |
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
Define the following:
Respiration
Define rusting?
Tick (√) the correct alternative from the choice given for the following statement.
Air pollution is due to the
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
______ soil has pH 7.
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% |
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?