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Question

What is the oxidation number of central atom in [Pt(NH3)3Cl]Cl ?

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is A 2
[Pt(NH3)3Cl]Cl
It can be written as, [Pt(NH3)3Cl]+Cl
The central atom in [Pt(NH3)3Cl]+ is Pt.
The oxidation state of NH3=0 and Cl=1
In general,
Let oxidation state of Pt=x
Applying formula, Sum of total oxidation state of all atoms= Overall charge on the compound.x+3×0+1×(1)=+1,x=2
Oxidation state of Pt=+2

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