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प्रश्न
What is the source of water in the following?
Wells
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उत्तर
Wells – Groundwater
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संबंधित प्रश्न
Give balanced chemical equation for the reaction of water with Sodium .
Name the gas produced when a piece of calcium is added to water.
Give reason of Carbonated drinks are bottled under high pressure.
Freezing mixture contains ............. and .............
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 |
What are its causes and how can water pollution be controlled ?
Identify A, B, C and D; first one is done for you.

Explain why:
If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
What is the composition of water? In what volume its elements combine?
Of the total water available on the earth, fresh water forms ______ percent.
Name one substance which is ‘deliquescent’.
Name the process which is responsible for the formation of droplets on the surface of a glass of cold drink. _______
Around 97% of water available on earth is ______ water.
“Every Drop Counts” is a slogan related to
Water polluted by various human activities causes a number of water borne diseases. Which of the following is not a water borne disease?
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A man travelling on a train threw an empty packet of food on the platform. Do you think this is a proper waste disposal method? Elaborate.
Write any two activities which require less than one bucket of water.
Why is there a need for conserving water? Give two reasons.
