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Which of the following does not give oxy...

Which of the following does not give oxygen on heating?

A

`KClO_(3)`

B

`Zn(ClO_(3))_(2)`

C

`K_(2)Cr_(2)O_(7)` solution in acidic medium is orenge

D

`(NH_(4))_(2)Cr_(2)O_(7)`

Text Solution

Verified by Experts

The correct Answer is:
D
Oxygen rich compounds like chlorate , perchromate `K_(2)Cr_(2)O_(7)` ect., when heated gives oxygen but ammonium dichromate gives nitrogen gas. `2KClO_(3)overset(Delta)(rarr)2KCl+3O_(2)darr`
`Zn(ClO_(3))_(2)overset(Delta)(rarr)ZnCl_(2)+3O_(2)darr`
`4K_(2)Cr_(2)O_(7)overset(Delta)(rarr)4K_(2)CrO_(4)+2Cr_(2)O_(3)+3O_(2)uarr`
`(NH_(4))_(2)Cr_(2)O_(7)overset(Delta)(rarr)N_(2)uarr+Cr\_(2)O_(3)+4H_(2)O`
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