Can $PC{l}_5$ act as an oxidising as well as a reducing agent? Justify.

In $PC{l}_5$, $P$ has $+5$ oxidation state.

Phosphorous can show maximum oxidation state of $+5$. It cannot increase its oxidation state beyond $+5$. Hence, $PC{l}_5$ is not a reducing agent. $PC{l}_5$ is an oxidizing agent as $P$ can decrease oxidation state from $+5$ to $+3$. Thus, $PC{l}_5$ oxidizes $Ag$ to $AgCl$.

It also oxidizes $Sn$ to $SnC{l}_4$.