Question

KmnO4on treatment with conc H2SO4 forms a compound X which decomposes explosively on heating forming Y , what is X & Y

Answer 1

$$\begin{gathered} \text{Dear student,} \\ \mathrm{When}{\mathrm{KMNO}}_4\mathrm{is}\mathrm{taken}\mathrm{in}\mathrm{excess}\mathrm{and}\mathrm{react}\mathrm{with}\mathrm{conc}.{\mathrm{H}}_2{\mathrm{SO}}_4\mathrm{it}\mathrm{gives}{\mathrm{Mn}}_2{\mathrm{O}}_7\mathrm{which}\mathrm{on}\mathrm{heating}\mathrm{gives}{\mathrm{MnO}}_2. \\ 2{\mathrm{KMNO}}_4+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{K}}_2{\mathrm{SO}}_4+{\mathrm{Mn}}_2{\mathrm{O}}_7+{\mathrm{H}}_2\mathrm{O} \\ \mathrm{When}{\mathrm{Mn}}_2{\mathrm{O}}_7\mathrm{is}\mathrm{heated}\mathrm{it}\mathrm{gives}{\mathrm{MnO}}_2 \\ {\mathrm{Mn}}_2{\mathrm{O}}_7\stackrel{∆}{\to 2}{\mathrm{MnO}}_2+\frac{3}{2}{\mathrm{O}}_2 \\ \mathrm{So},\mathrm{X}\mathrm{is}{\mathrm{Mn}}_2{\mathrm{O}}_7\mathrm{and}\mathrm{Y}\mathrm{is}{\mathrm{MnO}}_2 \\ \mathrm{Regards} \end{gathered}$$