A compound contains an alpha-hydrogen atom an | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The reaction described is the Aldol condensation of acetaldehyde $(CH_3CHO)$.Step $1$: Two molecules of acetaldehyde undergo aldol condensation in

Vedclass · Accepted Answer

$CH_3CHO$

Vedclass · Answer

(A) The reaction described is the Aldol condensation of acetaldehyde $(CH_3CHO)$.Step $1$: Two molecules of acetaldehyde undergo aldol condensation in the presence of dilute $NaOH$ to form $\beta$-hydroxybutanal.$CH_3CHO + CH_3CHO \xrightarrow{dil. NaOH} CH_3-CH(OH)-CH_2-CHO$ ($\beta$-hydroxybutanal).Step $2$: Upon heating with dilute acid,$\beta$-hydroxybutanal undergoes dehydration to form crotonaldehyde $(CH_3CH=CH-CHO)$.$CH_3-CH(OH)-CH_2-CHO \xrightarrow{\Delta, H^+} CH_3CH=CH-CHO + H_2O$ (Crotonaldehyde).Therefore,the starting compound is $CH_3CHO$.

List-$I$	List-$II$
$A$. Grignard reagent	$1$. $H_2 / Pd-BaSO_4$
$B$. Clemmensen reduction	$2$. $N_2H_4 / KOH / (CH_2OH)_2$
$C$. Rosenmund reduction	$3$. $CH_3MgX$
$D$. Wolff-Kishner reduction	$4$. $Zn-Hg / \text{conc. } HCl$
	$5$. $H_2 / Ni$

List-$I$ (Type of reaction)	List-$II$ (Final Product)
$A$. Reimer-Tiemann reaction	$I$. Chlorobenzene
$B$. Etard reaction	$II$. Salicylaldehyde
$C$. Sandmeyer reaction	$III$. Benzaldehyde
$D$. Friedel-Crafts reaction	$IV$. Acetophenone

$A$ compound contains an $\alpha$-hydrogen atom and forms a $\beta$-hydroxy aldehyde in the presence of a dilute alkali. When this product is heated with a dilute acid,it yields unsaturated crotonaldehyde. Identify the compound.

Similar Questions

Dimethyl ketones are usually characterized through

The light yellow compound produced when acetone reacts with iodine and alkali is:

Which of the following will undergo aldol condensation?

Match the following lists:
List-$I$ List-$II$
$A$. Grignard reagent $1$. $H_2 / Pd-BaSO_4$
$B$. Clemmensen reduction $2$. $N_2H_4 / KOH / (CH_2OH)_2$
$C$. Rosenmund reduction $3$. $CH_3MgX$
$D$. Wolff-Kishner reduction $4$. $Zn-Hg / \text{conc. } HCl$
$5$. $H_2 / Ni$

Vedclass Test Series

Exam Paper Generator

Online Exam Module