Which one of the following on thermal decomposition does not give an elementary gas

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NH4NO3

NH42Cr2O7

KClO3

KMnO4

answer is A.

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Detailed Solution

NH4NO3→∆N2O+2H2O (NH4)2Cr2O7→∆N2+Cr2O3+4H2O 2KClO3→∆2KCl+3O2 2KMnO4→∆K2MnO4+MnO2+O2

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