$\begin{array}{1 1} \text{(a) physisorption may transform into chemisorption at high temperature.} \\ \text{(b) chemisorption is more exothermic than physisorption at high temperature. } \\ \text{(c) physisorption increases with increasing temperature but chemisorption decreases with increasing temperature} \\ \text{(d) chemisorption is more endothermic than physisorption.} \end{array}$
