1.

Assertion :When H_(2)S is passedthrough a solutioncontaining [Cu(CN)_(4)]^(2-) and [Cd(CN)_(4)]^(2-) ions ,only cadinilumprecipitateas CdS. Reasion : The oxidationstateand coordination number of cadmiumin [Cd(CN)_(4)]^(2-) are 2 and 4 respectively.

Answer»

If both (A) and (B) are correct and (R ) is the correct explqanation of (A)
If both (A) and (B) are correct but (R ) is not the correct explqanation of (A)
If (A) is correct ,but (R ) is INCORRECT
If (A) is incorrect ,but (R ) is correct

Solution :(A) is true and itsexplanationis based on the stabilityconstantof the TWO complex ionspresent in solution (R ) is ALSO true not the correct explanation for(A)


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