Question

() Which of the water samples from the following 4
sources have the excessive quantity of Ca , sulphate
Mg, bicarbonate ?

(a) river water
(b) lake water
(c) sea water
(d) well water​

Answer 1

Answer:

sea water is the answer

Hope it's useful

Answer 2

Option C is correct, water samples from seawater have excessive quantity  of Ca, sulphate, Mg and bicarbonates.

• We know that calcium, sulphates, magnesium and bicarbonates gives hardness to water.
• According to this concept, sea-water has the maximum hardness thus it will have the maximum amount of calcium, sulphates, magnesium and bicarbonates.
• While river water, lake water and well water contain soft water.
• Moreover, sea water is not drinkable because of its hardness.