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The ratio of the molar amounts of H(2)S ...

The ratio of the molar amounts of `H_(2)S` needed to precipitate the metal ions from 20 mL each 1 M Cd `(NO_(3))_(2)` and 0.5 M `CuSO_(4)` is

A

`1:1`

B

`2:1`

C

`1:2`

D

indefinite

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The correct Answer is:
B
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