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Hard water becomes free from "….." ions ...

Hard water becomes free from `"….."` ions when passed through ion exchange resin containing RCOOH groups.

A

`Cl^(-)`

B

`SO_(4)^(2-)`

C

`H_(3)O^(+)`

D

`Mg^(2+)`

Text Solution

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The correct Answer is:
D
Hard water contains dissolved salts of calcium, Mg or Fe such as chlorides, sulphates, bicarbonates and carbonates.
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  11. The oxidising property of H(2)O(2) is best explained by assuming that ...

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  13. Decomposition of H(2)O(2) is favoured by

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