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Give the importance of water in transportation.
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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)
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Explain how water plays an important role in the Industry.
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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)
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Explain how water plays an important role in Agriculture.
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Complete the statement by filling in the blank with the correct words.
Water fit for human consumption and drinking purposes is called ____________.
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State whether the following statement is true or false. If false, write the correct statement.
Water finds application as a means of transporting goods.
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State whether the following statement is true or false. If false, write the correct statement.
If ‘X’ g. of solute is added to 100 g. of water at t°C and the solution formed is a saturated solution, then ‘X’ g. is the solubility of the solute.
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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.
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State whether the following statement is true or false. If false, write the correct statement.
On boiling water exists in the liquid state.
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State whether the following statement is true or false. If false, write the correct statement.
Respiration uses up water from the atmosphere.
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State whether the following statement is true or false. If false, write the correct statement.
Sodium carbonate and sodium sulphate do not form an aqueous solution.
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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 |
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Explain the meaning of the following term:
Saturated solution
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Explain the meaning of the following term:
The gaseous state of water in the air
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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.
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Name two gases which are soluble in water
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Name two gases which are insoluble in water.
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Which of the following activity does not involve use of water?
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Name the smallest particle from which matter is made up.
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