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प्रश्न
Why do wet clothes placed on a clothes line get dry after some time? Explain.
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उत्तर
After a while, wet clothing is hung out to dry because the sun’s heat helps the water to evaporate. Evaporation is the process of converting liquid water into water vapour.
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संबंधित प्रश्न
Give the importance of water in life processes
Complete the statement by filling in the blanks with the correct words.
Water generates ______in hydroelectric power stations and ________in boilers for industrial applications.
(carbon dioxide/steam/heat/electricity)
Explain how water plays an important role in the Industry.
Complete the statement by filling in the blanks with the correct words.
Water is added to the atmosphere by _____________and _____________.
(burning of fossil fuels/condensation of vapour/ respiration by living organisms/photosynthesis)
State whether the following statement is true or false. If false, write the correct statement.
On boiling water exists in the liquid state.
Match the statements in List I, 1-10 with their correct answer in List II, A to J.
| List I | List II |
| 1. Sodium carbonate and water | A: Seawater |
| 2. Chemical used in sedimentation during purification of water | B: The preferred place for an organism |
| 3. vapourisation | C: Liquid state |
| 4. Kerosene and water | D: Aqueous solution |
| 5. A solution which can dissolve more of solute at a given temperature | E: Dissolved gases and minerals |
| 6. Water as a habitat for marine life | F: Unsaturated solution |
| 7. A water-borne disease | G: Immiscible mixture |
| 8. Existence of water between 0°C and 100°C | H: Liquid to a gaseous state |
| 9. Taste in water is due to | I: Dysentery |
| 10. The most impure form of water | J: Alum |
Name two gases which are soluble in water
Analogy
Ground water : ______ :: Surface-water : lakes
Analogy:
Napier Bridge area: ______:: Pallikkaranai: Wet land.
Transpiration is a process in which plants ______.
