A) 6
B) 1
C) 7
D) 2
E) 3
Correct Answer: E
Solution :
\[\begin{align} & \underline{\begin{align} & C{{r}_{2}}O_{7}^{2-}+14{{H}^{+}}+6{{e}^{-}}\xrightarrow{{}}2C{{r}^{3+}}+7\,{{H}_{2}}O \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(2{{I}^{-}}\xrightarrow{{}}{{I}_{2}}+2{{e}^{-}})\times 3 \\ \end{align}} \\ & C{{r}_{2}}O_{7}^{2-}+14\,{{H}^{+}}+6{{I}^{-}}\xrightarrow{{}} \\ & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,2C{{r}^{3+}}+7{{H}_{2}}O+3{{I}_{2}} \\ \end{align}\] Hence, number of moles of \[{{I}_{2}}\]produced = 3
You need to login to perform this action.
You will be redirected in
3 sec
