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Hydrochloric Acid

A red coloure...

Question

A red coloured mixed oxide (X) on treatment with conc. $H N O_{3}$ gives a compound (Y). (Y) with HCl produces a chloride compound (Z) which can also be produced by treating (X) with cone. HCl. Compounds (X), (Y) and (Z) will be :

M n_{3} O_{4}, M n O_{2}, M n C l_{2}

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P b_{3} O_{4}, P b O_{2}, P b C l_{2}

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F e_{3} O_{4}, F e_{2} O_{3}, F e C l_{2}

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F e_{3} O_{4}, F e_{2} O_{3}, F e C l_{3}

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Solution

The correct options are
A $P b_{3} O_{4}, P b O_{2}, P b C l_{2}$
C $F e_{3} O_{4}, F e_{2} O_{3}, F e C l_{3}$
$P b_{3} O_{4} + 4 H N O_{3} \to 2 P b {(N O_{3})}_{2} + P b O_{2} + 2 H_{2} O$
$P b O_{2} + H C l \to P b C l_{2} + H_{2} O + C l_{2}$
$P b_{3} O_{4} + 8 H C l \to 4 H_{2} O + 3 P b C l_{2} + C l_{2}$
X, Y and Z are $P b_{3} O_{4}, P b O_{2}, P b C l_{2}$ respectively.

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