Maltose on treatment with dilute HCl gives-D-Glucose and D-FructoseD-FructoseD-GlucoseD-Galactose

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Standard XII

Chemistry

Maltose

Maltose on tr...

Question

Maltose on treatment with dilute HCl gives:

D-Galactose

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D-Glucose

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D-Glucose and D-Fructose

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D-Fructose

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Which of the following monosaccharides are present as five-membered cyclic structure (furanose structure)?
(a) Ribose (b) Glucose (c) Fructose (d) Galactose

Q. Which of the following hexoses will form the same osazone when treated with excess phenyl hydrazine? (a) D-glucose, D-galactose and D-talose (b) D-fructose, D-mannose and D-galactose (c) D-glucose, D-mannose and D-galactose (d) D-glucose, D-fructose and D-mannose

$G l u c o s e$ $+ C H_{3} O H H C l (g) \to$	(1)Mannose
$S u c r o s e$ $+ H_{3} O^{+} \to$	(2) Galactose
$F r u c t o s e$ $B a s e \to$	(3) Glucose
$L a c t o s e$ $+ H_{3} O^{+} \to$	(4) Fructose
	(5) Glucoside

Q. Difference between Glucose, Fructose and Galactose.

Q. A non reducing disaccharide 'A' hydrolysis with dilute acid gives an equimolar mixture of D – (+) – glucose and D – (–) – Fructose.

A + H_{2} O \overset{HCl}{\to} C_{6} H_{12} O_{6} + C_{6} H_{12} O_{6} {[α]}_{D} = + 66.5 ° + 52.5 ° - 92.4 °

Identify A. What is the mixture of D – (+) glucose and D – (–) – Fructose known as?
Name the linkage that holds the two units in the disaccharide.

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