Question

$Cr{O}_3+H_{2}O\to A\stackrel{O{H}^{-}}{\to }B$

What are $A$ and $B$ in the above reaction?

• A. $H_{2}Cr{O}_4,H_{2}C{r}_2{O}_7$
• B. $H_{2}C{r}_2{O}_7,C{r}_2{O}_3$
• C. $Cr{O}_4^{2-},C{r}_2{O}_7^{2-}$
• D. $H_{2}C{r}_2{O}_7,Cr{O}_4^{2-}$

Answer 1

The correct option is D $H_{2}C{r}_2{O}_7,Cr{O}_4^{2-}$

The complete reaction is as follows:
$Cr{O}_3+H_{2}O\to \underset{\left(A\right)}{H_{2}C{r}_2{O}_7}\stackrel{O{H}^{-}}{\to }\underset{\left(B\right)}{Cr{O}_4^{2-}}$