First slide

Glucose

Question

Glucose gives gluconic acid when it reacts with
A) ${Br}_{2} / H_{2} O$
B) $Tollen' s reagent$
C) $Fehling' s reagent$
D) $conc . {HNO}_{3}$

Easy

A

A, B, C, D
B

A, B, C only
C

B, C, D only
D

B, C only

Solution

Aldehyde group is very much susceptible to oxidation;
A,B,C are mild oxidizing agents;
They oxidize glucose to gluconic acid;
They cannot oxidize primary alcohol group;
Concentrated nitric acid not only oxidizes aldehyde group $(- CHO)$ to $- COOH$ group but oxidizes primary alcohol group $(- {CH}_{2} OH)$ also to $- COOH$ group;
It is thus useful to detect the presence of primary alcohol group $({CH}_{2} OH)$ in glucose ;

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App