Q.

Which of the following ligand is used to estimate the hardness of water

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a

Na2EDTA

b

Carboxy peptidase

c

en

d

Ox

answer is A.

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Detailed Solution

Na2EDTA forms a stable complex with Ca+2 and Mg+2 which are responsible for hardness of water.
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Which of the following ligand is used to estimate the hardness of water