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Pyranose and Furanose

Methyl D - gl...

Question

Methyl D - glucoside on reaction with $H I O_{4}$ consume two moles of the reagent and produces the dialdehyde (A) and one mole of $H C O O H$
The result of this reaction proves that glucose has pyranose structure

A

True

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B

False

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Solution

The correct option is A True
From reaction it can be seen that, glucose has pyranose structure

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Similar questions

Q. Methyl D - glucoside on reaction with

H l O_{4}

consume two moles of the reagent and produces the dialdehyde (A) and one mole of

H C O O H

The result of this reaction proves that glucose has :

Q. When glucose is treated with an excess of

H I O_{4}

, the products formed are..............moles of

H C O O H

and one mole of

H C H O

Q. One mole of glycerol when heated with two moles of

H I O_{4}

gives two moles of ........................ and one mole of ........................

Q. Glucose, when heated with

C H_{3} O H

, in presence of dry

H C l

α -

methyl glucosides and

β -

methyl glucosides are formed. This is because it contains:

Q. D- glucose, on treating with methanol in the presence of dry

H C l

gives methyl glucoside according to the following reaction:

Mention true (T) and False (F) from the following statements:

S_{1} :

The glucosides do not reduce fehling's solution.

S_{2} :

The glucosides do not react with hydrogen cyanide or hydroxylamine.

S_{3} :

Behaviour of glucosides as stated in

S_{1}

S_{2}

indicates the absence of free

- C H O

S_{4} :

The two forms of glucosides are enantiomers.

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Pyranose and Furanose

Standard XII Biology

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