Aldehydes and Ketones - Result Question 34
35. After completion of the reactions (I and II), the organic compound (s) in the reaction mixtures is/are
(2013)
Reaction I
(a) reaction I $: P$ and reaction II $: P$
(b) reaction I$: U$, acetone and reaction II $: Q$, acetone
(c) reaction I$: T, U$, acetone and reaction II $: P$
(d) reaction I$: R$, acetone and reaction II $: S$, acetone
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Answer:
Correct Answer: 35. (c)
Solution:
- Plan: When acetone reacts with $B r _2$ in basic medium, bromoform is formed.
When $CH _3 COCH _3$ and $Br _2$ are in equimolar quantity, all the $Br _2$ (limiting reactant) is converted into desired products and $2 / 3$ mole of $CH _3 COCH _3$ remains unreacted, being in excess. When acetone reacts with $Br _2$ in acidic medium, there is monobromination of acetone.
$CH _3 COCH _3$ and $Br _2$ react in $1: 1$ mole ratio and $(P)$ is formed. In reaction $I,(U)$ and $(T)$ are formed and acetone (reactant) remains unreacted. In reaction II, $(P)$ is formed.
BETA
