• # question_answer $4{{K}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\text{heat}}4{{K}_{2}}Cr{{O}_{4}}+3{{O}_{2}}+X$. In the above reaction X is  [DCE 2004] A) $Cr{{O}_{3}}$ B) $C{{r}_{2}}{{O}_{7}}$ C) $C{{r}_{2}}{{O}_{3}}$ D) $Cr{{O}_{5}}$

Potassium dichromate, on heating gives oxygen and chromic oxide$(C{{r}_{2}}{{O}_{3}})$. $4{{K}_{2}}C{{r}_{2}}{{O}_{7}}\xrightarrow{\Delta }4{{K}_{2}}C{{r}_{2}}{{O}_{4}}+3{{O}_{2}}+2C{{r}_{2}}{{O}_{3}}$