First slide

Werner's theory

Question

According to werner theory primary, secondary of central atom in $[Cr {(H_{2} O)}_{6}] {Cl}_{3}$ Complex respectively

Moderate

A

4 and 5
B

6 and 3
C

3 and 0
D

3 and 6

Solution

3Cl^- satisfies primary valency, 6 H₂O satisfies secondary valency and the ligand satisfy primary and secondary valency is called duel valency, that means ligand involved in calculation of primary and secondary valency. Hence Cl^- ligand act as primary and secondary valency in given complex $[Cr {(H_{2} O)}_{6}] {Cl}_{3}$ .

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