Q. 45

Assertion : Aromatic aldehydes and formaldehyde undergo Cannizaro reaction.

Reason : Aromatic aldehydes are almost as reactive as formaldehyde.

A. Assertion and reason both are correct and reason is correct explanation of assertion.

B. Assertion and reason both are wrong statements.

C. Assertion is correct but reason is wrong statement.

D. Assertion is wrong but reason is correct statement.

E. Assertion and reason both are correct statements but reason is not correct explanation of assertion.

Answer :

Cannizaro is actually a type of disproportionation reaction (a reaction involving both oxidation and reduction). And in this case of aldehydes which do not have any α-H atoms and therefore undergoes self oxidation in the presence of concentrated alkali solutions (NaOH or KOH) to form acid and reduction to form alcohols.


Aromatic aldehydes also do not have α-H so they also undergo this reaction.



But aromatic aldehydes cannot be almost reactive as the aliphatic aldehydes like formaldehyde so the reason statement is wrong because the aromatic aldehydes are usually very stabilised by the more resonance stabilization of the aromatic ring attached with it which making its carbonyl carbon less acidic or electrophillic unlike formaldehyde where there is no such ring present so the carbonyl carbons will be more acidic or electrophillic(electron loving nature) .


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Reaction of Aldehyde/Ketone37 mins
Aldol Condensation45 mins
Preparation of Carboxylic Acid38 mins
Practice Quiz on Aldol Condensation36 mins
Preparations of Aldehydes & Ketones47 mins
Human Evolution | An Important Concept40 mins
Medelian disorder series: Thalassemia, Sickle cell anaemia & Phenylketonuria60 mins
Rapid Quiz challenge - Cell Structure & Cell Division52 mins
Different high order thinking questions based on DNA structure39 mins
Everything About Genetic DisordersFREE Class
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :