Question

Sea water cannot be used for domestic purposes because it contains?

• A. Soluble salts
• B. Dust
• C. Insoluble salts
• D. Acids

Answer 1

The correct option is A

Soluble salts

The explanation for correct option:
(A)

• Most of this water (about 97 per cent) is in oceans and seas.
• This water has many salts (Calcium, Magnesium, Sodium etc.) dissolved in it.
• It is saline (containing salt), so it is not fit for drinking or domestic purposes.

The explanation for incorrect options:
(B) Dust can be present in water but this is not the valid reason why seawater cannot be used for domestic purposes.
(C) Insoluble salts can be present in water but when the salts are insoluble then we can easily separate them.
(D) Acids are not the reason why seawater cannot be used for domestic purposes.

Hence option A is correct.