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BITSAT 2011

Exam: BITSAT
Year: 2011
Subject: Chemistry
Chapter: Aldehydes and Ketones

BITSAT 2011 · Chemistry · Aldehydes and Ketones

The reagent (s) which can be used to distinguish acetophenone from...

The reagent (s) which can be used to distinguish acetophenone from benzophenone is (are)

Options

A2,4 - dinitrophenylhydrazine
Baqueous solution of $\mathrm{NaHSO}_{3}$
Cbenedict reagent
D $\mathrm{I}_{2}$ and $\mathrm{NaOH}$

Correct answer

D. $\mathrm{I}_{2}$ and $\mathrm{NaOH}$

Step-by-step solution

\mathrm{I}_{2}

and

\mathrm{NaOH}

react with acetophenone

\left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COCH}_{3}\right)

to give yellow ppt. of

\mathrm{CHI}_{3}

but benzophenone

\left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COC}_{6} \mathrm{H}_{5}\right)

does not give haloform test.

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