$4{{\rm{K}}_2}{\rm{C}}{{\rm{r}}_2}{{\rm{O}}_7}\xrightarrow{{{\rm{Heat}}}}4{{\rm{K}}_2}{\rm{Cr}}{{\rm{O}}_4} + 3{{\rm{O}}_2} + X$ In the above reaction, $X$ is

${\rm{C}}{{\rm{r}}_2}{{\rm{O}}_3}$

${\rm{Cr}}{{\rm{O}}_3}{\rm{\;}}$

${\rm{C}}{{\rm{r}}_2}{{\rm{O}}_7}$

NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

1 Easy

1 of 1

Understanding +4 | -1

4{\mathrm{K}_2}\mathrm{C}{\mathrm{r}_2}{\mathrm{O}_7}\xrightarrow{{\mathrm{Heat}}}4{\mathrm{K}_2}\mathrm{Cr}{\mathrm{O}_4} + 3{\mathrm{O}_2} + X

In the above reaction,

X

View answer and explanation

Correct option: C

\mathrm{C}{\mathrm{r}_2}{\mathrm{O}_3}

Option C (

\mathrm{C}{\mathrm{r}_2}{\mathrm{O}_3}

) is correct because when potassium dichromate is heated, it decomposes to form potassium chromate, oxygen, and chromium(III) oxide.