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Which of the following compounds will give a yellow precipitate with iodine and alkali?
A
2-Hydroxypropane
B
Acetophenone
C
Methyl acetate
D
Acetamide
Detailed Solution
A yellow precipitate of iodoform ($CHI_3$) is given by compounds having the $CH_3-CO-$ group attached to C or H.
Acetophenone has this group: $C_6H_5COCH_3 \xrightarrow{I_2/NaOH} C_6H_5COONa + CHI_3\downarrow$
In methyl acetate and acetamide the $CH_3CO-$ group is attached to O or N, so they do not give the test.
As per the key the answer is acetophenone.
Acetophenone has this group: $C_6H_5COCH_3 \xrightarrow{I_2/NaOH} C_6H_5COONa + CHI_3\downarrow$
In methyl acetate and acetamide the $CH_3CO-$ group is attached to O or N, so they do not give the test.
As per the key the answer is acetophenone.