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प्रश्न
Fill in the blank:
Unpolluted water has _____ amount of dissolved oxygen.
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उत्तर
Unpolluted water has high amount of dissolved oxygen.
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संबंधित प्रश्न
Explain why:
Rain water does not leave behind concentric rings when boiled.
What will happen if the total supply of potable water is finished?
Select the correct answer of the following statement:
A solution which can pass through a filter paper but not through a semipermeable membrane.
Name or state the following:
A deliquescent salt of a trivalent metal.
Differentiate between the following:
Natural water and treated water
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 |
If, at some place, it did not rain for a very long period of time, what would be its effect on the life of the people there?
Suggest some ideas to save rainwater in your school.
________ of water is in oceans and seas.
How is the life of organisms living in water affected when water gets polluted?
