How many of the following compounds would give a positive Tollen’s test?
${\text{(I)CH}}_3-\text{CHO}$
(II)
${\text{(III) CH}}_{\text{3}}{\text{- CH}}_{\text{2}}{\text{- CH}}_{\text{2}}{\text{- CH}}_{\text{2}}\text{- CH}\left(\text{OH}\right){\text{OCH}}_{\text{3}}$

${\text{(V) CH}}_{\text{3}}\text{COOH,}$
$\text{(VI) HCOOH}$
$\text{(VII) CHOCOOH}$
$\text{(VIII) CHOCHO}$
${\text{(IX) CH}}_{\text{3}}{\text{COCH}}_{\text{2}}\text{OH}$
${\text{(X) CH}}_{\text{3}}{\text{COCH(OH)CH}}_{\text{3}}$

Tollens' test, also known as silver-mirror test, is a test used to distinguish between an aldehyde and a ketone. Formation of silver mirror is the confirmation of the test.During the course of reaction, imagine that aldehyde is formed then also it will give tollen test.

R-CHO+ Ag(NH₃)₂ $\to$RCOO^-   + Ag(silver is deposited)