• # question_answer A simple method to remove peroxides from ethers is to treat them with an aqueous solution of A)  $KI$                                    B)  $KCNS$ C)  $N{{a}_{2}}{{S}_{2}}{{O}_{3}}$                               D)  $B{{r}_{2}}$

KI is added to old stocks of ethers when I is oxidised to ${{I}_{2}}$ by ether peroxide which itself is reduced to ether$2{{I}^{-}}\xrightarrow{{}}{{I}_{2}}+2{{e}^{-}}$Ether peroxide$+\,2{{e}^{-}}\xrightarrow{{}}$ ether$+{{O}_{2}}$ In actual practice, the old stock of ether is repeatedly shaken with KI solution till it ceases to impart brown colour due to liberation of${{I}_{2}}$.