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(D) The thermal decomposition of potassium permanganate $(KMnO_4)$ at $513 \ K$ is given by: $2KMnO_4 (X) \xrightarrow{513 \ K} K_2MnO_4 (Y) + MnO_2 +

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$KMnO_4, K_2MnO_4$ and $Cl_2$

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(D) The thermal decomposition of potassium permanganate $(KMnO_4)$ at $513 \ K$ is given by: $2KMnO_4 (X) \xrightarrow{513 \ K} K_2MnO_4 (Y) + MnO_2 + O_2 (g)$ Thus,$X = KMnO_4$ and $Y = K_2MnO_4$. $MnO_2$ reacts with $NaCl$ and concentrated $H_2SO_4$ to produce chlorine gas,which is a pungent gas: $MnO_2 + 4NaCl + 4H_2SO_4 	o MnCl_2 + 4NaHSO_4 + 2H_2O + Cl_2 (Z)$ Thus,$Z = Cl_2$. Therefore,the correct sequence is $X = KMnO_4, Y = K_2MnO_4, Z = Cl_2$.

Thermal decomposition of a $Mn$ compound $(X)$ at $513 \ K$ results in compound $Y$,$MnO_2$ and a gaseous product. $MnO_2$ reacts with $NaCl$ and concentrated $H_2SO_4$ to give a pungent gas $Z$. Identify $X, Y$ and $Z$.

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