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प्रश्न
The ultimate source of all water on the earth is
पर्याय
oceans and seas
spring and wells
rivers and lakes
rain
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उत्तर
rain
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संबंधित प्रश्न
Why is water essential for life?
Give balanced chemical equation for the reaction of water with Iron .
Give reason of Carbonated drinks are bottled under high pressure.
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 |
Give balanced chemical equations to show the reaction between Coke and steam.
Water exists in all three states. Discuss.
What is the importance of dissolved impurities in water?
Give a balanced equation for the following conversion:
Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate.
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?
Pick from the following one chemical used to disinfect water.
