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Which of the following reactions of glucose can be explained only by its cyclic structure?
(i) Glucose forms pentaacetate.
(ii) Glucose reacts with hydroxylamine to form an oxime.
(iii) Pentaacetate of glucose does not react with hydroxylamine.
(iv) Glucose is oxidised by nitric acid to gluconic acid
Answers (1)
The answer is the option (iii). The property of glucose being non-reactive with hydroxylamine determines the absence of the -CHO group. This property is defined only by the cyclic structure of glucose. Therefore, option (iii) Pentaacetate of glucose does not react with hydroxylamine is the correct answer.
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