$0.75 \mathrm{~g}$ platinic chloride of a mono- acidic base on ignition gives $0.245 \mathrm{~g}$ platinum.…

$0.75 \mathrm{~g}$ platinic chloride of a mono- acidic base on ignition gives $0.245 \mathrm{~g}$ platinum. The molecular weight of the base is molecular weight of $\mathrm{Pt}=195$
  1. $75.0$
  2. $93.5$
  3. 100
  4. $80.0$

Solution

Apply the formula : M.wt
$=\frac{\text { Acidity }}{2}\left(\frac{w t \text { of } \mathrm{Pt} \text { salt } \times 195}{\mathrm{wt} \text { of } \mathrm{Pt}}-410ight)$
$\therefore \mathrm{M} . \mathrm{wt}=\frac{1}{2}\left(\frac{0.75 \times 195}{0.245}-410ight)=93.5$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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