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
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The products obtained on hydrolysis of sucrose are:

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

(i) HI/red P

(ii) Bromine water

EASY
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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.

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

MEDIUM
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Glucose on prolonged heating with HI gives

EASY
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Complete hydrolysis of starch gives:

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

HARD
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Glucose on treatment with excess of phenyl hydrazine gives

EASY
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C6H12O6373KHI/Red PA+B

The products A and B respectively are

MEDIUM
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Hydrolysis of sucrose gives:

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

EASY
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Total number of atoms in ring of pyranose are:

MEDIUM
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Glucose on reduction with NaBH4 gives

EASY
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α-D glucose and β-D glucose are :-

MEDIUM
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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 :-

MEDIUM
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Which of the following will give different osazone than the other three?

MEDIUM
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On oxidation with bromine water, glucose gives a carboxylic acid 'x' The number of -COOH  group(s) in 'x' is_______.

HARD
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Carbon compound that does not show mutarotation is

EASY
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On reduction of glucose with Na/Hg and water gives?

EASY
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The solution of D- glucose provides two forms of D- glucopyranose which are called as: