Questions

Statement-I: $α$ -D(+) -glucopyranose and $β$ -D(+)-glucopyranose are C-2 epimers.
Statement-II: Melting point of $β$ -D(+)-glucopyranose is lesser than that of $α$ -D(+) -glucopyranose.

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a

Both statements I and II are correct

b

Statement-I is correct and statement-II is incorrect

c

Statement-I is incorrect and statement-II is correct

d

Both statements I and II are incorrect

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detailed solution

Correct option is D

α-D-glucose and β-D-glucose differ in their configuration only at C-1 (or) functional group carbon (anomeric carbon). They are anomers (or) diastereomers (or) C-1 epimers.They are not enantiomers. Melting point of α-D-glucose pyranose -419 K.Melting point of β-D-glucose pyranose -423 K.

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