How many moles of I2 are consumed per mole of ethanol in the reaction CH3CH2OH + I2 + NaOH that finally gives CHI3 and HCOONa?

JEE Main levelSingle correct optionDifficulty 2 of 3co122

How many moles of $I X_{2}$ are consumed per mole of ethanol in the reaction $CH X_{3} CH X_{2} OH + I X_{2} + NaOH$ that finally gives $CHI X_{3}$ and $HCOONa$ ?

One mole of

I X_{2}

oxidises ethanol to ethanal. Ethanal then takes 3 mol of

I X_{2}

for triiodination. The overall equation is

CH X_{3} CH X_{2} OH + 4 I X_{2} + 6 NaOH CHI X_{3} + HCOONa + 5 NaI + 5 H X_{2} O

, so 4 mol of

I X_{2}