Which of the following cations does not form complex with ammonia?
A. `Cd^(2+)`
B. `Pb^(2+)`
C. `Ag^(+)`
D. `Cu^(2+)`

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1 Answers

Correct Answer - 2
Ammonia is Lewis base. It forms complexes with cations but fails to form complexes with `Pb^(2+)` ions because it lacks empty d-orbitals and has low charge density.

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