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प्रश्न
Pour water from the ice tray into a kettle. Ask an elder at your home to heat the kettle and observe the mouth of the kettle when the water starts boiling.
What do you see?
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उत्तर
I see the water turns into vapour and bubbles are formed.
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संबंधित प्रश्न
Name the four main sources of water.
Give reason On opening a bottle of a cold drink, a fizz sound is heard.
Match the statements in column A with that in column B.
| Column A | Column B |
| (a) deliquescent substance | (1) sodium bicarbonate |
| (b) hygroscopic substance | (2) magnesium chloride |
| (c) efflorestance substance | (3) conc. sulphuric acid |
| (d) substance causing temporary hardness | (4) washing soda |
Water exists in all three states. Discuss.
Explain why:
Rain water does not leave behind concentric rings when boiled.
Give a balanced equation for the following conversion:
Potassium oxide to a strong alkali.
Complete the statement by filling the blank with the correct word from the option.
Solubility of most solids ___ with rise in temperature.
Fill in the blank:
Unpolluted water has _____ amount of dissolved oxygen.
Select the correct word from the words in option to complete the sentence:
If pressure on the surface of water increases its boiling point ____ and freezing point ____.
Which state government made rain water harvesting mandatory in the year 2001?
