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Write any two reactions of glucose whic...

Write any two reactions of glucose which cannot be explained by the open chain structure of glucose molecule.

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Reaction of glucose that cannot be explained by open chain structure .
(i) Glucose gives the characteristic reactiono of alcohols and carbonyl grop (aldehydes and ketones).
However it does not form addition compound with ammonia and sodium bisulphite and does not respond to 2,4-DNP test and schiffs test .
(ii) The penta - acetate of glucose does not react within hydroxyl amine indicating the absence of free - CHO group.
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