Advertisements
Advertisements
Question
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
Advertisements
Solution
A candle burns in ajar of oxygen, but gets extinguished in nitrogen.
APPEARS IN
RELATED QUESTIONS
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 |
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
Fill in the blank
Although we cannot see air, we can ___it.
State what do you understand by the term ‘air’. Explain its importance to mankind.
How is light scattered by the air?
What is the importance of air in transmission of sound?
What is wind energy?
What should be done if the clothes of a person catch fire accidentally? Why?
List five activities that are possible due to the presence of air.
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.
