A) in electroplating
B) as a reducing agent
C) it oxidizes ferrous ions into ferric ions in acidic media as an oxidizing agent
D) as an insecticide
Correct Answer: C
Solution :
Potassium dichromate is an oxidizing agent it oxidizes ferrous ions into ferric ions in acid medium. \[C{{r}_{2}}O_{7}^{2-}+14{{H}^{+}}+6{{e}^{-}}\xrightarrow{{}}2C{{r}^{3+}}+7{{H}_{2}}O\] \[[F{{e}^{2+}}\xrightarrow{{}}F{{e}^{3+}}+{{e}^{-}}]\times 6\] __________________________________ \[C{{r}_{2}}O_{7}^{2-}+6F{{e}^{2+}}+14{{H}^{+}}\xrightarrow{{}}\] \[6F{{e}^{3+}}+2C{{r}^{3+}}+7{{H}_{2}}O\]
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