PDF chapter test TRY NOW

4. State true or false. If false, correct the statement I

1. Sewage should be treated well before being discharged it into water bodies.

It is not necessory to treat sewage before being dumped into water bodies.
Sewage should be thoroughly treated before being dumped into water bodies.

2. Sea water is suitable for irrigation as it contains dissolved salts.

Sea water is not suitable for irrigation as it has high salinity.
Sea water is suitable for irrigation as it contains dissolved salts.

3. Excessive use of chemical fertilizers depletes the soil and causes water pollution.

Excessive use of chemical fertilizers depletes the soil but does not cause water pollution.
The excess of chemical fertilisers depletes the soil and pollutes the water.

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