Question

3 – hydroxyl butanal is formed when X reacts with Y in dilute Z solution. What are X, Y & Z?

• A. $\stackrel{X}{C{H}_{3}CHO},\stackrel{Y}{(C{H}_3{)}_{2}CO},\stackrel{Z}{NaOH}$
• B. $\stackrel{X}{C{H}_{3}CHO,}\stackrel{Y}{C{H}_{3}CHO,}\stackrel{Z}{NaCl}$
• C. $\stackrel{X}{(C{H}_3{)}_{2}CO,}\stackrel{Y}{(C{H}_3{)}_{2}CO,}\stackrel{Z}{HCl}$
• D. $\stackrel{X}{C{H}_{3}CHO,}\stackrel{Y}{C{H}_{3}CHO,}\stackrel{Z}{NaOH}$

Answer 1

The correct option is D $\stackrel{X}{C{H}_{3}CHO,}\stackrel{Y}{C{H}_{3}CHO,}\stackrel{Z}{NaOH}$

Two molecules of acetaldehyde undergo aldol condensation in presence of a base (NaOH) to form 3 – hydroxy butanal.