Question

Higher ph for water is undesirable, because mcq a it corrodes zinc, copper and lead pipes b it induces sour taste c it renders chlorination less effective d it promotes growth of iron and sulphur bacteria

Answer 1

The answer is c) it renders chlorination less effective.

About pH

pH is a value to determine the acidic or basic quality of a substance. The pH scale has 0 - 14 values, where values less than 7 indicate acidic , 7 indicate neutral and above 7 alkaline or basic.

The normal desirable pH of water is 6.5 to 8.5

Effects of higher pH

When the pH of water increases this range, the water becomes alkaline which results

        - Renders chlorination less effective and so the amount of chlorine for water purification needs to be increased.

       - Induces bitter taste.

Effects of lower pH

    - When pH decreases it corrodes zinc, copper and lead pipes.

    - Sulfur bacteria mostly grow in acidic pH.