Q7 of 21 Page 18

Which type of water is associated with heart diseases?

Soft water is linked to high incidences of heart diseases. It is also not considered suitable for drinking purposes.


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5

State the reason for deposition of white scale in the interior of boilers after prolong use?

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State some units of hardness.

 8

On what factor does the production of foam depend?

 9

State some advantages of hard water.