The Aldol Addition

Q.

An organic compound C3H6O does not give a precipitate with 2, 4‑Dinitrophenyl hydrazine reagent and does not react with metallic sodium. It could be:

1. CH3CH2CHO
2. CH3COCH3
3. CH2=CH-CH2OH
4. CH2=CH-O-CH3

Q. Which of the following will undergo aldol condensation?

1. Acetaldehyde
2. Propanaldehyde
3. Benzaldehyde
4. Trideutereo acetaldehyde

Q.
(X) in the above reaction is :

1. $C{H}_{3}COOH$
2. $Br-C{H}_2-COOH$
3. $(C{H}_{3}CO{)}_{2}O$
4. $CHO-COOH$

Q. In the reaction,
$C_6{H}_{5}CHO+(C{H}_{3}CO{)}_{2}O\underset{{180}^{\circ }C}{\overset{C{H}_{3}COONa}{\to }}X$, 'X' is

1. $C_6{H}_{5}COOH$
2. $C_6{H}_{5}C{H}_3$
3. $C_6{H}_{5}CH=CHCOOH$
4. $C_6{H}_{5}CO{C}_6{H}_5$

Q. Which of the following are examples of aldol condensation?

1. $2C{H}_{3}CHO\stackrel{Dil.NaOH}{\to }C{H}_{3}CHOHC{H}_{2}CHO$
2. $2C{H}_{3}COC{H}_3\stackrel{Dil.NaOH}{\to }\left(C{H}_3{)}_{2}C\right(HO)C{H}_{2}COC{H}_3$
3. $2HCHO\stackrel{Dil.NaOH}{\to }C{H}_{3}OH$
4. $C_6{H}_{5}CHO+HCHO\stackrel{Dil.NaOH}{\to }{C}_6{H}_{5}C{H}_{2}OH$

Q. Identify the final product (B) in the following sequence of reactions:

1. 
2. 
3. 
4.