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Q.

Which of the following pairs can be separated by H2S in dil. HCl?

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a

Cu2+ and Cd2+

b

Cu2+ and Ni2+

c

Cu2+ and Zn2+

d

Hg2+ and Al3+

answer is B.

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Detailed Solution

Both Cu2+ and Cd2+ are precipitated in group II by H2S in dil. HCl.
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