Test Index

JAMB Chemistry 2018 Paper

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Question : 6

Total: 87

The type of bonding in [Cu(NH

_3

^4

^{2+}

is

coordinate
electrovalent
metallic
covalent

Solution:

Concept:

A dative bond forms when one atom supplies both electrons shared in the bond.

Explanation:

In

\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}

,

\mathrm{NH}_3

donates a lone pair of electrons to the

\mathrm{Cu}^{2+}

ion.

This makes each

\mathrm{Cu}

–

\mathrm{N}

bond a coordinate/dative covalent bond.

Answer:

A. coordinate

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