Which of the following does not give oxygen on heating?

Options

A. `KClO_(3)`
B. ` Zn(ClO_(3))_(2)`
C. ` K_(2)Cr_(2)O_(7)`
D. `(NH_(4))_(2)Cr_(2)O_(7)`

Answer

D

Explanation

`(NH_(4))_(2)Cr_(2)O_(7) overset(Delta)toN_(2)+Cr_(2)O_(3)+2H_(2)O`
`2KClO_(3)overset(Delta)to2KCl+3O_(2)`
`Zn(ClO_(3))_(2)overset(Delta)toZnCl_(2)+3O_(2)`
`K_(2)Cr_(2)O_(7) overset(Delta)to2K_(2)CrO_(4)+Cr_(2)O_(3)+(3)/(2)O_(2)`