First slide

Werner's theory

Question

Primary valency of Platinum in Pt ${Cl}_{4} . 6 {NH}_{3}$ is

Moderate

A

6
B

2
C

4
D

8

Solution

Primary valency in modern terminology is oxidation state.
Oxidation state of ‘Pt’ in Pt ${Cl}_{4} . 6 {NH}_{3}$ is +4
$[Pt {({NH}_{3})}_{6}] {Cl}_{4}$

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