Q.
Reaction of solid KMnO4 with conc. H2SO4 produces manganese heptoxide (Mn2O7) in
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Solution:
KMnO4 on treatment with conc. H2SO4 forms manganese heptoxide via permanganyl sulphate which decomposes explosively on heating 2KMnO4+3H2SO4→2KHSO4+(MnO3)2SO4+2H2O (MnO3)2SO4+H2O→Red-brown liquidMn2O7+H2SO4 Mn2O7→2MnO2+23O2 ∴Mn2O7 so formed is a red-brown liquid