State whether the following statements are true or false. If false, wr

1.	State whether the following statements are true or false. If false, write the correct statement.1. Sea water contains salts of calcium and magnesium.2. Water finds application as a means of transporting goods.3. On boiling water exists in the liquid state.4. Respiration uses up water from the atmosphere.5. Well water exists below the impervious rocky layers of earth.6. Sodium carbonate and sodium sulphate do not form an aqueous solution.7. 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.8. Purification of water is carried out to remove – dissolved gases e.g. carbon dioxide and dissolved minerals like magnesium salts.9. Water from rivers and lakes is – potable water.10. Chemical pollutants include metallic salt solution of mercury and lead.
Answer» 1. True 2. True 3. False. Correct — On boiling water exists in the gaseous state. 4. False. Correct — Respiration add up water to the atmosphere. 5. False. Correct — Well water exists above the impervious rocky layers of earth. 6. False. Correct — Sodium carbonate and sodium sulphate form an aqueous solution. 7. True 8. True 9. False. Correct — Water from rivers and lakes is impure water. 10. True

State whether the following statements are true or false. If false, write the correct statement.1. Sea water contains salts of calcium and magnesium.2. Water finds application as a means of transporting goods.3. On boiling water exists in the liquid state.4. Respiration uses up water from the atmosphere.5. Well water exists below the impervious rocky layers of earth.6. Sodium carbonate and sodium sulphate do not form an aqueous solution.7. 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.8. Purification of water is carried out to remove – dissolved gases e.g. carbon dioxide and dissolved minerals like magnesium salts.9. Water from rivers and lakes is – potable water.10. Chemical pollutants include metallic salt solution of mercury and lead.

Answer»

1. True

2. True

3. False.

Correct — On boiling water exists in the gaseous state.

4. False.

Correct — Respiration add up water to the atmosphere.

5. False.

Correct — Well water exists above the impervious rocky layers of earth.

6. False.

Correct — Sodium carbonate and sodium sulphate form an aqueous solution.

7. True

8. True

9. False.

Correct — Water from rivers and lakes is impure water.

10. True