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प्रश्न
State whether the following statement is true or false. If false, write the correct statement.
Purification of water is carried out to remove – dissolved gases e.g. carbon dioxide and dissolved minerals like magnesium salts.
विकल्प
True
False
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उत्तर
True
संबंधित प्रश्न
Give the percentage of water in the following:
Watermelon
What is water cycle? What is its importance?
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)
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.
Water finds application as a means of transporting goods.
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 |
Explain the meaning of the following term:
Saturated solution
Name the following
The natural process by which circulation of water takes place from the earth’s surface to the atmosphere and back to the earth’s surface.
Analogy
Ground water : ______ :: Surface-water : lakes
Analogy:
Napier Bridge area: ______:: Pallikkaranai: Wet land.
