Question

Amongst the following, the number of compounds which reduce Tollen's reagent are ___________.

.

Answer 1

Answer: 4

Both aliphatic and aromatic aldehydes get oxidised to corresponding carboxylic acids on reaction with Tollen's reagent forming silver mirror (also known as silver mirror test.)
$\therefore$ Compounds $\left(i\right),\left(ii\right),\left(iii\right)$ and $\left(vii\right)$ will reduce Tollen's reagent.