Question

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

• A. 2,4-dinitrophenyl hydrazine
• B. aqueous solution of $NaHSO_3$
• C. Benedict reagent
• D. $l_2$ and $Na_2 CO_3$

Answer 1

Answer: (D)

$l_2$ and $Na_2 CO_3$

Answer 2

The structures of acetophenone and benzophenone are . When acetophenone containing is treated with $l_2$ and $Na_2 CO_3$ it forms yellow precipitate of $CHI_3$ whereas benzophenone does not give this test.Acetophenons gives iodoform test due to presence of'-COCH3 group.