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
Give two uses of the following component present in air:
water vapour
Mention five causes of air pollution.
Name two air pollutants which cause global warming.
State four steps to be taken to control air pollution.
Fill in the blank
Although we cannot see air, we can ___it.
Tick (√) the correct alternative from the choice given for the following statement.
Which of the following is not a greenhouse gas?
Answer in your own words.
What are the various constituents of air? Write their uses.
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
What is the importance of air in transmission of sound?
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
