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Manganeese Dioxide Test

Thermal decom...

Question

Thermal decomposition of a $M n$ compound (X) at $513 K$ result in compound (Y), $M n O_{2}$ and a gaseous product. $M n O_{2}$ reacts with $N a C l$ and concentrated $H_{2} S O_{4}$ to give a pungent gas Z. X, Y and Z, respectively, are

K_{3} M n O_{4}, K_{2} M n O_{4}

and

C l_{2}

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K_{2} M n O_{4}, K M n O_{4}

and

S O_{2}

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K M n O_{4}, K_{2} M n O_{4}

and

C l_{2}

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K_{2} M n O_{4}, K M n O_{4}

and

C l_{2}

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Solution

The correct option is C $K M n O_{4}, K_{2} M n O_{4}$ and $C l_{2}$
Thermal decomposition of Mn compound (X), i.e. $K M n O_{4}$ at $513 K$ result in compound $Y (i . e . K_{2} M n O_{4}), M n O_{2}$ and a gaseous product. $M n O_{2}$ reacts with $N a C l$ and concentrated $H_{2} S O_{4}$ to give a pungent gas $Z (i . e . C l_{2}) .$ The reactions involved are as follows :

$2 K M n O_{4} (X) 513 K - -- \to Δ K_{2} M n O_{4} (Y) + M n O_{2} + O_{2} (g)$
$M n O_{2} + 4 N a C l + 4 H_{2} S O_{4} \to$
$M n C l_{2} + 4 N a H S O_{4} + 2 H_{2} O + C l_{2} (g) (Z) P u g e n t g a s$
Thus, correct answer is (c).

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Thermal decomposition of a Mn compound (X) at 513 K result in compound (Y), MnO2 and a gaseous product. MnO2 reacts with NaCl and concentrated H2SO4 to give a pungent gas Z. X, Y and Z, respectively, are

Thermal decomposition of a $M n$ compound (X) at $513 K$ result in compound (Y), $M n O_{2}$ and a gaseous product. $M n O_{2}$ reacts with $N a C l$ and concentrated $H_{2} S O_{4}$ to give a pungent gas Z. X, Y and Z, respectively, are