In salts of polyatomic anion, as polarising power of cation increases, thermal stability of the salt decreases, and decomposed species may further undergo redox reaction.
Q. Which of the following species undergoes non-redox thermal decomposition reaction on heating?

Options

A. `FeSO_(4)`
B. `SnSO_(4)`
C. `H_(2)C_(2)O_(4)`
D. `Na_(2)HPO_(4)`

Answer

D

Explanation

`implies2FeSO_(4)overset(Delta)toFe_(2)O_(3)+SO_(2)uarr+SO_(3)uarr`
`implies SnSO_(4) overset(Delta)toSnO_(2)+SO_(2)uarr`
`implies H_(2)C_(2)O_(4)overset(Delta)to CO uarr+CO_(2)uarr+H_(2)O`
`implies 2Na_(2)HPO_(4) overset(Delta)to Na_(2)P_(2)O_(7)+H_(2)O`