A) oxidation of glucose with nitric acid
B) acetylation of glucose with acetic anhydride
C) oxidation of glucose with mild oxidizing etgent
D) prolonged heating of glucose with HI
Correct Answer: A
Solution :
The presence of primary alcoholic group in glucose can be confirmed by oxidation of glucose with nitric acid in which ?OH group changed to ?COOH group. \[\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \underset{\underset{\text{Glucose}}{\mathop{\text{C}{{\text{H}}_{\text{2}}}\text{OH}}}\,}{\overset{{{\text{(CHOH)}}_{\text{4}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}}\, \end{smallmatrix}}{\mathop{\text{CHO}}}\,+3[O]\xrightarrow[\Delta ]{HN{{O}_{3}}}\underset{\begin{smallmatrix} \text{ }\!\!|\!\!\text{ } \\ \underset{\underset{\begin{smallmatrix} \text{Glucaic}\,\text{acid} \\ \text{(saccharic}\,\text{acid)} \end{smallmatrix}}{\mathop{\text{CHOH}}}\,}{\overset{{{\text{(CHOH)}}_{\text{4}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}}\, \end{smallmatrix}}{\mathop{\text{COOH}}}\,\]
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