MCQ
A complex containing $K^+, Pt(IV)$ and $Cl^-$ is $100\%$ ionised giving $i = 3$. Thus, possible complex is
- A$K_2[Pt\, Cl_4]$
- ✓$K_2[Pt\, Cl_6]$
- C$K_3[Pt\, Cl_5]$
- D$K[Pt\, Cl_3]$
✓
Answer
Correct option: B.
$K_2[Pt\, Cl_6]$
b
$i=$v a n Hoff factor $=1+(y-1) \alpha \quad(y=n u m b e r$ of ions, $\alpha=$ degree of ionisation)
$i=$v a n Hoff factor $=1+(y-1) \alpha \quad(y=n u m b e r$ of ions, $\alpha=$ degree of ionisation)
(2) $K _{2} P t Cl _{6} \rightarrow 2 K ^{+}+\left[ P _{ t } Cl _{6}\right]^{2-} ; i =1+2=3$
In $(1)$, oxidation number of $Pt =2$
In $(2),$ the oxidation number of $P t=4$
Therefore, $K _{2}\left[ P t Cl _{6}\right]$ is the correct answer.
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