Question

How many compounds give positive Tollens' test?

$1.$ D-glucose

$2.$ D-fructose

$3.$ $CH_{3}\overset{O}{\overset{\left|\right. \left|\right.}{C}}H$

$4.$ $PhCH_{2}OH$

$5.$ $CH_{3}CH_{3}$

$\text{6} \text{.} \, \text{HCOOH}$

$\text{7} \text{.} \, \text{CH}_{\text{3}} \text{COOH}$

Answer 1

These four can reduce tollen's reagent.

$1.$ D-glucose

$2.$ D-fructose ( $\alpha $ -hydroxy ketone)

$3.$ $CH_{3}-CHO$

$6.$ $H-\overset{O}{\overset{\left|\right. \left|\right.}{C}}-OH$