The precipitate of $\mathrm{Fe}(\mathrm{OH}){}_3$ obtained in group III is

Iron(III) hydroxide is the characteristic reddish-brown (rust-coloured) precipitate of group III. $\mathrm{Al}(\mathrm{OH}){}_3$ is white gelatinous and $\mathrm{Cr}(\mathrm{OH}){}_3$ is grey-green.