(a) $CH_{2}OH(CHOH)_{4}CHO\ \underset{oxidation}{\overset{\ \ \ \ \ \ \ Br_{2}H_{2}O\ \ \ \ \ \ \ }{\rightarrow}}\$ Glucose $CH_{2}OH\ (CHOH)_{4}COOH$ gluconic acid
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Ph.D. in Physics with 19+ years of teaching experience.