Select CORRECT statements :

Options

A. Langmuir adsorption isotherm is expected to be applicable at low gas pressure and moderately high temperature.
B. The rate of an enzyme catalysed reaction depends upon enzyme concentration.
C. A negative catalyst raises the activation energy barrier of a reaction and thus reduces its rate.
D. In physisorption gases having higher critical temperature are adsorbed to a greater extent than those with lower critical temperature.

Answer

A, B, D

Explanation

A negative catalyst does not raises the activation energy barrier of a reaction, it actually functions to remove the active intermediate from the reaction and thus, it retards the rate of a reaction.