Which of the following statements is not true about glucose?
(a) It is an aldohexose
(b) On heating with HI, it forms n-hexane
(c) It is present in furanose form
(d) It does not give 2, 4- DNP test

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Solution

Answer: (c)

It is present in pyranose structure but not furanose form.

Glucose is an aldohexose having a structural formula.

Glucose on heating with HI produces n-hexane.
$C_{6} H_{12} O_{6} H i - \to C_{6} H_{14}$
Glucose does not give 2, 4, DNP test due to its existence as the cyclic structure shown below

It is present in pyranose form, as shown below

Pyranose means pyran (membered ring containing oxygen) like structure.

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