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प्रश्न
Explain why:
Water is an excellent liquid to use in cooling systems.
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उत्तर
Water is an excellent liquid to use in cooling systems because of its high specific heat.
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संबंधित प्रश्न
Give balanced chemical equation for the reaction of water with Sodium .
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 |
A captain of ship will tell you that an iceberg is much bigger than it looks. Why is it so ?
How is aquatic life benefited by the fact that water has maximum density at 4oC?
Explain why:
Air dissolved in water contains a higher proportion of oxygen.
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.
State the causes of ‘eutrophication’.
State the importance of water for all general uses.
Match the terms in List I with the correct answers in List II.
| List I | List II |
| 1. Solubility in a given solvent decreases with an increase in temperature. | A: Na2SO4.10H2O |
| 2. A white efflorescent crystal | B: NaOH |
| 3. A hygroscopic dehydrating agent | C: Ca(HCO3)2 |
| 4. A deliquescent alkali | D: conc. H2SO4 |
| 5. A substance present in temporary hard water | E: CaSO4 |
Pick from the following one chemical used to disinfect water.
