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Ammonia

Ammonia is a ...

Question

Ammonia is a Lewis base. It forms complexes with cations. Which one of the following cations does not form complex with ammonia?

A

Ag

^{+}

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B

Cu

^{2 +}

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C

Cd

^{2 +}

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D

Pb

^{2 +}

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Solution

The correct option is A Pb $^{2 +}$
Ammonia is a Lewis base. It forms complexes with cations of transition elements. $P b^{2 +}$ does not form a complex with ammonia as lead ( $P b$ ) is not a transition element. Lead ( $P b$ ) is a p - block element.

Hence option D is correct.

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