(1) Adsorption is always exothermic
(2) FeCl$_3$ is preferred over KCl to treat a cut due to bleeding
(3) The enthalpy of adsorption of chemisorption is high
(4) When a solution of acetic acid in water is shaken with charcoal the concentration of the acid decreases in the solution
$\begin{array}{1 1} (1) \;and (3) \\ (2)\;and;(4) \\ All \;of\;the\;above \\ none\;of\;the\;above \end{array} $
