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प्रश्न
How is aquatic life benefited by the fact that water has maximum density at 4oC?
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उत्तर
The property of anomalous expansion of water enables aquatic life to exist because water freezes on the surface of the water body, but it is still liquid below the ice layer.
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संबंधित प्रश्न
Name the gas produced when fossil fuel is burnt.
Give one word for the following statement:
The gaseous form of water found in air .
Why is water considered a compound?
Explain why:
Fused CaCl2 or conc. H2SO4 is used in a desiccator.
Why is it said that seawater is useful even though it is not potable?
Give a balanced equation for the following conversion:
Sulphur dioxide to sulphurous acid using a neutral liquid.
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 |
Unscramble the words and fill in the blanks.
- ondencsaonti ______
- vaeionorpat ______
- ecippitatrino ______
Complete the following chart by writing appropriate words in the boxes marked (a) to (e).
A man travelling on a train threw an empty packet of food on the platform. Do you think this is a proper waste disposal method? Elaborate.
