In salts of polyatomic anion, as polarising power of cation increase, thermal stability of the salt decrease and decomposed species may further undergo redox reaction
Q. Water soluble salt(x) was heated into three products A, B and C and B and C are two different paramagnetic gases. A is red in hot condition, then salt(x) is :

Options

A. `Hg(NO_(3))_(2)`
B. `FeC_(2)O_(4)`
C. `ZnSO_(4)`
D. `Pb(NO_(3))_(2)`

Answer

D

Explanation

`impliesPb(NO_(3))_(2) overset(Delta)to underset("red in hot (Litharge)")(PbO)+underset("Two different paramagnetic gases")ubrace(2NO_(2)uarr+(1)/(2))O_(3)`
`implies Hg(NO_(3))_(2)overset(Delta)toHg+2NO_(2)uarr+O_(2)uarr`
`implies FeC_(2)O_(4)overset(Delta)to FeO+CO uarr+CO_(2)uarr`
`implies ZnSO_(4) overset(gt800^@C)to ZnO+SO_(2)uarr+(1)/(2)O_(2)uarr`