Water True and False

Write True False for each statement, Rewrite the false statements 1. River water is the most impure form of water.

2. Use of pesticides in excess, causes water pollution.

3. All living beings contain 10% to 20% of water.

4. Dissolved gases in water are necessary for respiration.

5. Cholera is a disease caused due to water pollution

Answers

Write True False for each statement, Rewrite the false statements

1. False (River water is the pure form of water)

2. True

3. False (All living beings contain 70% to 80% of water)

4. True

5. True

Groundwater contains dissolved salt and is free from suspended impurities. Answer :True
The molecules of ice, water and steam are different. Answer :False
Rainwater gets polluted while falling down. Answer :False
Groundwater contains suspended impurities. Answer :False
Digestion of food in the stomach takes place with the help of water. Answer :True
Typhoid is a waterborne disease caused by virus. Answer :False
Trees should be planted as they help in causing rainfall. Answer :True
Flood causes soil erosion. Answer :True

Water helps in excretion . Answer :True
Potable water is not fi t for drinking. Answer :False
With increase in pressure, the boiling point of water decreases. Answer :False
Dissolving a covalent compound like glucose results in a chemical change. Answer :False
Water or any other liquid in which solute dissolves is called solvent. Answer :True
A solution of mixture salt and rock . Answer :False
The rate of formation of water vapour is called evaporation . Answer :True
Water is used as a coolant in power genera Answer :True
The boiling point of water decreases with increase in pressure. Answer :False
A solution is a mixture of solvent and solute . Answer :True
The crystallised water can be easily removed by heat . Answer :True
Magnesium reacts with steam vigorously and forms a red solid of magnesium oxide and hydrogen gas Answer :False
Hard water is not suitable for drinking and cooking purposes. Answer :True

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