Which of the following does not give oxygen on heating?

Options

A. `Zn(ClO_3)_(2)`
B. `K_(2)Cr_(2)O_(7)`
C. `(NH_4)_(2)Cr_(2)O_(7)`
D. `KClO_(3)`

Answer

C

Explanation

`(NH_4)_(2)Cr_(2)O_(7) overset(triangle)(to) N_(2)+Cr_(2)O_(3)+4H_(2)O`
`Zn(ClO_3)_(2) overset (triangle)(to) ZnCl_(2)+3O_(2)`
`2KClO_(3) overset(triangle)(to) 2KCl+3O_(2)`
`4K_(2)Cr_(2)O_(7) overset(triangle)(to) 4K_(2)CrO_(4)+2Cr_(2)O_(3)+3O_(2)`.