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In dissolved mineral salts ___________ gets converted into the bicarbonates by the action of carbondioxide by water.

(a) Carbonate of calcium

(b) Carbonates of magnesium

(c) Carbonates of calcium and magnesium

(d) Neither carbonates of calcium nor magnesium

This question was posed to me during an online exam.

The origin of the question is Sources, Impurities and Hardness of Water in chapter Water of Applied Chemistry

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Right option is (c) Carbonates of calcium and magnesium

Best explanation: In dissolved mineral salts, the carbonates of calcium and magnesium get converted into the bicarbonates by the action of the carbondioxide by water.

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