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A water sample has ppm level concentration of following anions F - = 10 ; SO 4 2 - = 100 ; NO 3 - = 50 The anion/anions that make/makes the water sample unsuitable for drinking is/are

Options

  1. ABoth SO 4 2 - and NO 3 -
  2. BOnly F -
  3. COnly SO 4 2 -
  4. DOnly NO 3 -

Correct answer

B. Only F -

Step-by-step solution

Ions Maximum prescribed concentration in drinking water Fluoride 1 . 5   ppm Sulphate 500   ppm Nitrate 50   ppm Fluoride ion concentration is more than the limit, so it makes water unsuitable for drinking

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