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Q.

The correct  statement/s about the pyranose form of a sugar (X) given below is/are

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a

It exists in two anomeric pyranose forms

b

The pent-O-methyl derivative of (X) is non reducing

c

It reacts with Tollen’s reagent to give a silver mirror

d

It resists reduction with aqueous sodium borohydride

answer is A, B, C.

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Detailed Solution

Since anomeric carbon is a chiral carbon, so given sugar can exist in two anomeric pyranose forms.
Since it is in hemiacetal, so it can reduce to tollen’s reagent to silver mirror.
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The correct  statement/s about the pyranose form of a sugar (X) given below is/are