A) \[+3\]
B) \[+2\]
C) \[+6\]
D) \[+4\]
Correct Answer: A
Solution :
[a] \[C{{r}_{2}}O_{7}^{2-}+14{{H}^{+}}+6{{I}^{-}}\xrightarrow{{}}2C{{r}^{3}}+7{{H}_{2}}O+3{{I}_{2}}\] Since, \[C{{r}_{2}}O_{7}^{2-}\] is reduced to \[C{{r}^{3+}},\] thus final state of \[Cr\] is \[+3,\] which is formed by the reaction between KI and acidified potassium dichromate solution.You need to login to perform this action.
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