Question

Which of the following compounds reduce(s) ammoniacal silver nitrate solution?
$C_6{H}_{5}CHO$
$C{H}_{3}C{H}_{2}CHO$
$C{H}_{3}C{H}_{2}OH$
$C{H}_{3}CH\left(OH\right)COC{H}_3$

• A. $C{H}_{3}CH\left(OH\right)COC{H}_3,C{H}_{3}C{H}_{2}CHO,C_6{H}_{5}CHO$
• B. $C{H}_{3}C{H}_{2}OH,C_6{H}_{5}CHO,C{H}_{3}CH\left(OH\right)COC{H}_3$
• C. $C{H}_{3}C{H}_{2}OH,C{H}_{3}C{H}_{2}CHO,C{H}_{3}CH\left(OH\right)COC{H}_3$
• D. $C_6{H}_{5}CHO,C{H}_{3}C{H}_{2}CHO$

Answer 1

The correct option is D $C_6{H}_{5}CHO,C{H}_{3}C{H}_{2}CHO$

Both aliphatic and aromatic aldehydes give Tollen's test. $\alpha$-hydroxy ketones (termnal) are also oxidised by Tollen's reagent. Thus correct option is (d).