Q. $K_{2}{Cr}_{2}O_{7}\overset{\mathrm{\Delta}}{\rightarrow}K_{2}{CrO}_{4} + O_{2} + X\$ In the above reaction $X\$ is
A) ${CrO}_{3}$
B) ${Cr}_{2}O_{7}$
C) ${Cr}_{2}O_{3}$
D) ${CrO}_{5}$
Explanation
(c)
Potassium dichromate, on heating gives oxygen and chromic oxide (${Cr}_{2}O_{3}$).
$4K_{2}{Cr}_{2}O_{7}\overset{\mathrm{\Delta}}{\rightarrow}4K_{2}{CrO}_{4} + 3O_{2} + 2{Cr}_{2}O_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.