Solveeit Logo
Login

Question

Chemistry Question on properties of d block elements

4K2Cr2O7−>[Heat]4K2CrO4+3O2+X.{4K2Cr2O7 ->[Heat] 4K2CrO4 + 3O2 + X. } In the above reaction X is:

A

CrO3{ CrO3 }

B

Cr2O7{Cr2O7 }

C

Cr2O3{Cr2O3 }

D

CrO5{ CrO5 }

Answer

Cr2O3{Cr2O3 }

Explanation

Solution

Potassium dichromate, on heating gives oxygen and chromic oxide (Cr2O3){(Cr2O3)}.
4K2Cr2O7−>[Δ]4K2CrO4+3O2+2Cr2O3{4K2Cr2O7 ->[\Delta] 4K2CrO4 + 3O2 + 2Cr2O3 }