Among the given options, only option (c) is true as both physisorption and chemisorption depend on the nature of the gas (adsorbate). The correction of incorrect options is as follows (a) Chemisorption is highly specific in nature. (b) Physisorption is reversible. (d) Chemisorption has a higher enthalpy of adsorption than physisorption. (e) Physisorption is a physical adsorption process which also depends on the surface area of the adsorbent.