Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
No, tiny bubbles will not appear because when Paheli boiled the water, the air from the water escaped out so there is no dissolved air in this water. Hence, the cooled boiled water will not make any tiny bubbles.
APPEARS IN
संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
Discuss harmful effects of greenhouse effect.
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Name two air pollutants which cause acid rain.
Fill in the blank
Although we cannot see air, we can ___it.
How is light scattered by the air?
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
The composition of air is always exactly the same.
Wind does not help in the movement of which of the following?
Make sentences using the given set of words.
Air, wind, motion, called
