Which of the following does not give oxygen on heating ?

Options

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

Answer

C

Explanation

It yields `N_(2)` gas on heating
`(NH_(4))_(2) Cr_(2)O_(7) rarr Cr_(2)O_(3) + N_(2) + H_(2)O`
Otheras yield `O_(2)` gas on heating
`Zn(CIO_(3)(_(2) rarr ZnCI_(2) + 3O_(2)`
`4K_(2)Cr_(2)O_(7) overset (400^(@)C) rarr 4K_(2)CrO_(4) + 2Cr_(2)O_(4) + 2Cr_(2)O_(3) + 3O_(2)`
`2KCIO_(3) overset (400^(@)C) rarr 2KCI + 3O_(2)`