The reagent commonly used to determine hardness of water titrimetrical

1.	The reagent commonly used to determine hardness of water titrimetrically is [AIIMS 2003]
A.	Oxalic acid
B.	Disodium salt of EDTA
C.	Sodium citrate
D.	Sodium thiosulphate
Answer» C. Sodium citrate

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The reagent commonly used to determine hardness of water titrimetrically is [AIIMS 2003]

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