A) It contains bacteria.
B) It has foul smell.
C) It is heavier than tap water.
D) It has salts which get deposited in the pipelines and boilers.
Correct Answer: D
Solution :
Sea water is unfit for use in factories though it is available in plenty because the salts in it get deposited on the sides of pipelines and boilers. If sea water is used for long time, the pipelines will be blocked completely. Scaly deposits on the sides of boilers reduce heat absorption.
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