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Distinguish between alpha-D-gluecop-yran...

Distinguish between `alpha-D`-gluecop-yranose `(I)` and methyl `alpha-D`-gluocopyranoside `(II)`.

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(I) will give positive and (II) Will give negative test with Bendedict's or Tollens solution because `(I)` is cyclic hemiacetal and `(II)` is a cyclic acetal.
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