A) +3
B) +2
C) +6
D) +4
Correct Answer: A
Solution :
\[C{{r}_{2}}O_{7}^{2-}\,+14{{H}^{+}}\,+6{{l}^{-}}\xrightarrow{\,}\,2C{{r}^{3+}}\,+7{{H}_{2}}O\,+3{{l}_{2}}\] \[C{{r}_{2}}O_{7}^{2-}\]is reduced to\[C{{r}^{3+}}\] Thus, final state of Cr is + 3.You need to login to perform this action.
You will be redirected in
3 sec