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प्रश्न
How is the life of organisms living in water affected when water gets polluted?
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उत्तर
The addition of undesired chemicals such as pesticides, fertilizers, industrial and domestic wastes not only kills the organisms but also causes diseases in the aquatic organisms. There is a decrease in the amount of dissolved oxygen in water, which has a negative impact on aquatic life.
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संबंधित प्रश्न
Water has ...................... density and .................. volume at 4°C.
What do you understand by soft water?
Select the correct answer of the following statement:
A drying agent placed in desiccator.
Give a balanced equation for the following conversion:
Sulphur dioxide to sulphurous acid using a neutral liquid.
Name one substance which is ‘deliquescent’.
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 |
_____ is a type of rainwater harvesting.
Which state government made rain water harvesting mandatory in the year 2001?
From where do the following usually get water? In which form is water present in them?
Plants
Open drain system is a breeding place for which of the following?
