Test		End Result
i)	$AlC{l}_{3\left(aq\right)}+$ Blue litmus	p)	Colloidal solution
ii)	$AlC{l}_{3\left(aq\right)}+$ Blue litmus $+N{H}_{4}OHdropbydrop$	q)	Red Coloration
iii)	$FeC{l}_3+K_4\left[Fe{\left(CN\right)}_6\right]$  (Excess)	r)	Blue floating mass
iv)	$F{e}^{3+}+SC{N}^{-}$	s)	Blue Coloration
		t)	Colourless solution

When blue litmus is added to the solution of $AlC{l}_3,$ a red coloration is obtained due to the acidic nature of the solution. On addition of $N{H}_{4}OH$ solution drop by drop the solution becomes alkaline and aluminium hydroxide is precipitated.  $Al{\left(OH\right)}_3$ adsorbs blue colour from the solution and forms insoluble adsorption complex named ‘lake’.  Thus, a blue mass floating in the colourless solution is obtained.  The test is therefore called lake test.
 $-FeC{l}_3+K_4\left[Fe{\left(CN\right)}_6\right]\to KFe\left[Fe{\left(CN\right)}_6\right] +3KCl$
                        (Excess)            (soluble Prussian blue)
                                                   (a colloidal solution)
$-F{e}^{3+}+SC{N}^{-}\to {\left[Fe\left(SCN\right)\right]}^{2+}$  Blood red colour