MCQ
According to Werner's theory of coordination compounds:
- ✓Primary valency is ionisable.
- BSecondary valency is ionisable.
- CPrimary and secondary valencies are ionisable.
- DNeither primary nor secondary valency is ionisable.
✓
Answer
Correct option: A.
Primary valency is ionisable.
Primary valency is ionisable according to Werner's theory of coordination compounds.
According to Werner's coordination theory, there are two kinds of valency, primary and secondary. The primary valency of a central metal ion is satisfied with anions.
For example, in $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right] \mathrm{SO}_4$ primary valency is $2$ and secondary valency is $4.$
Secondary valence refers to coordination number. Since copper is coordinated to $4$ ammonia ligands, secondary valence is $4.$ Primary valence is satisfied by anions. Since sulphate ion has $−2$ charge, primary valence is $2.$
According to Werner's coordination theory, there are two kinds of valency, primary and secondary. The primary valency of a central metal ion is satisfied with anions.
For example, in $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right] \mathrm{SO}_4$ primary valency is $2$ and secondary valency is $4.$
Secondary valence refers to coordination number. Since copper is coordinated to $4$ ammonia ligands, secondary valence is $4.$ Primary valence is satisfied by anions. Since sulphate ion has $−2$ charge, primary valence is $2.$
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