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Question
What is needed to construct a rain water harvesting pit?
Solution
Boulders, gravels, and Coarse sand are needed to construct a rain water harvesting pit.
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RELATED QUESTIONS
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 |
Explain why:
Rain water does not leave behind concentric rings when boiled.
Define
Henry's law
Select the correct answer of the following statement:
A solution which can pass through a filter paper but not through a semipermeable membrane.
State the meaning of the term ‘water pollution’. State how you would find out, the different sources of pollution of water bodies in the locality.
Unscramble the words and fill in the blanks.
- ondencsaonti ______
- vaeionorpat ______
- ecippitatrino ______
Around 97% of water available on earth is ______ water.
Match Column I with Column II
| Column I | Column II | ||
| (a) | Groundwater | (i) | The solid form of water |
| (b) | Bawri | (ii) | Wastage of water |
| (c) | Snow | (iii) | Water management |
| (d) | Drip irrigation | (iv) | Small water |
| (e) | Leaking taps | (v) | Water table |
The jumbled word is given here. Write the correct form of each word.
QUIFERA
What is water?
