Glucose and its Properties

IMPORTANT

Glucose and its Properties: Overview

This topic covers concepts, such as, Preparation of Glucose from Sucrose (Cane Sugar), Preparation of Glucose from Starch, Mutarotation & Lobry de Bruyn van Ekenstein Rearrangement etc.

Important Questions on Glucose and its Properties

EASY
IMPORTANT

The products obtained on hydrolysis of sucrose are:

MEDIUM
IMPORTANT

What are the products formed when D-glucose is reacted with the following species?

(i) HI/red P

(ii) Bromine water

EASY
IMPORTANT

Which of the following reactions and facts of D-glucose cannot be explained by its open chain structure?

(i) Despite having the aldehyde group, glucose does not give Schiff test and 2, 4-DNP test.

(ii) Glucose does not react with sodium hydrogen sulphite to form addition product.

(iii) The pentaacetate of glucose does not react with hydroxyl amine showing the absence of free-CHO group.

MEDIUM
IMPORTANT

Name the reagent and condition required for carrying out of the following reaction

Question Image

HARD
IMPORTANT

Treatment of D-glucose with aqueous NaOH results in a mixture of monosaccharides, which are

EASY
IMPORTANT

Starch is hydrolysed in presence of sulphuric acid to obtain _____.

EASY
IMPORTANT

How is glucose obtained from starch?

HARD
IMPORTANT

Which of the following will form the same osazone when treated with excess of phenylhydrazine?

HARD
IMPORTANT

Glucose on treatment with excess of phenyl hydrazine gives

EASY
IMPORTANT

C6H12O6373KHI/Red PA+B

The products A and B respectively are

MEDIUM
IMPORTANT

Hydrolysis of sucrose gives:

HARD
IMPORTANT

Name of the product formed when glucose reacts with concentrated HNO3.

MEDIUM
IMPORTANT

Name the reagent which on reaction with glucose confirms the presence of five hydroxyl groups in glucose:

EASY
IMPORTANT

Total number of atoms in ring of pyranose are:

MEDIUM
IMPORTANT

Glucose on reduction with NaBH4 gives

EASY
IMPORTANT

α-D glucose and β-D glucose are :-

MEDIUM
IMPORTANT

The beta β and alpha α glucose have different specific rotation. When either is dissolved in water, their specific rotation changed to reach a certain fixed value. This is called :-

HARD
IMPORTANT

How many of the following will produce gluconic acid or it's salt when treated with D- Glucose
(a) Tollen's reagent
(b) HNO3
(c) Br2/ water
(d) HIO4
(e) Fehling's solution
(f) Red P/HI/Δ
(g) Benedict's solution
(h) PhNHNH2
(i) HCN

MEDIUM
IMPORTANT

The _____ form of glucose is optically inactive.

MEDIUM
IMPORTANT

Draw mirror images of glucose and fructose.