Question

Geometrical isomerism is a kind of stereoisomerism which is present in the compounds containing a double bond $(C=C,C=N.N=N)$ and arise due to the restricted or frozen rotation about the double bond. The atoms or groups attached to the doubly bonded carbons must be different. In aldoximes, the isomer is named as syn if hydrogen and hydroxyl groups are on the same side of $C=N$ bond and if these are on opposite sides, the isomer is named as anti. In ketoximes, the prefixes syn and anti indicate which group of ketoxime is syn or anti to hydroxyl group.
On treating with $N{H}_{2}OH$, which can form two products?

• A. Acetaldehyde
• B. Acetone
• C. Formaldehyde
• D. Benzophenone

Answer 1

The correct option is A Acetaldehyde

Oxime is formed when carbonyl compounds react with $N{H}_2-OH$. The formed compound can show syn and anti geometrical isomerism.