In which of the following properties of an open chain structure of glucose could not be explaine...

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In which of the following properties of an open chain structure of glucose could not be explained by
\( \mathrm{P} \) Baeyer -

W
(1) Glucose contain aldehyde group, but does not give schiffs test
(2) Glucose does not react with sodium hydrogen sulphite and ammonia
(3) The pentaacetate of glucose does not react with hydroxy amine indicates absence of \( -\mathrm{CHO} \) group
(4) All of these
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