Which of the following is not correct?

Options

A. Peptisation is the process in which precipitates are converted into colloids
B. The physical states of dispersing phase and dispersion medium in colloid like pesticide spray respectively are liquid and gas
C. `DeltaG/_0,DeltaS/_0` and `DeltaH/_0` for adsorption.
D. Manufacture of sulphuric acid by lead chamber process is a heterogeneous catalysis

Answer

D

Explanation

In Lead shamber process, the reactants `(SO_(2)` and `O_(2))` as well as the catalyst `(NO)` are all gases. Thus, it is homogeneous catalysis.
Peptisation is process of converting a freshly obained precipitate into a colloidal sol on shaking with a suitable electrolyte.
Pesticide spray is colloidal dispersion of liquid in gas (aerosol).
For adsorption, `DeltaG,DeltaS` and `DeltaH` are all negative.