4K(2) Cr(2) O(7) overset(heat)rarr 4K(2)...

`4K_(2) Cr_(2) O_(7) overset(heat)rarr 4K_(2) CrO_(4) + 3O_(2) + X`. In the above reaction `X` is

`CrO_(3)`

`Cr_(2)O_(7)`

`Cr_(2)O_(3)`

`CrO_(5)`

Text Solution

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The correct Answer is:

Potassium dichromate, on heating gives oxygen and chromic oxide `(Cr_(2)O_(3))`.
`4K_(2) Cr_(2) O_(7) overset(Delta)rarr 4K_(2) Cr_(2) O_(4) + 3O_(2) + 2Cr_(2) O_(3)`

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K_(2)Cr_(2)O_(7) overset(Delta) K_(2)CrO_(4)+Cr_(2)O_(3)+O_(2)uarr

For disproportionation reaction.

For comproportionation reaction.

For either intermolecular redox reaction or displacement reaction

For either thermal combination redox reaction or thermal decomposition redox reaction.

K_(2)Cr_(2)O_(7) overset(Delta) to K_(2)CrO_(4)+Cr_(2)O_(3)+O_(2)uarr

For disproportionation reaction.

For comproportionation reaction.

For either intermolecular redox reaction or displacement reaction

For either thermal combination redox reaction or thermal decomposition redox reaction.

K_(2)CrO_(4) is converted to K_(2)Cr_(2)O_(7) by

conc. `H_(2)SO_(4)`

KOH

`K_(2)CO_(3)`

`KNO_(3)`