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प्रश्न
Name a ‘pure form’ and an,‘impure form’ of water in the natural state.
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उत्तर
Rain water – pure natural water.
Sea water, lake water – impure form of natural water.
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संबंधित प्रश्न
Give balanced chemical equation for the reaction of water with Sodium .
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Give the importance of dissolved air – in water.
Select the correct answer of the following statement:
A drying agent placed in desiccator.
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 |
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