If `I` is the intenisty of an absorbed light and `c` is the concentration of `AB` for the photochemical process. `AB+hv rarr AB^(**)`, the rate of formation of `AB^(**)` is directly proportional to

If I is, the intensity of absorbed light and 'C' is the concentration of (AB) for the photochemical process AB+hvrarrAB^* the rate of formation of AB* is directly proportional to : C , I , mathbf(I)^(2) , CI

The work done in the process AB is

a:b and c:d are in proportion then

AB is an ionic solid. The ionic radii of A^+ and B^(-) are respectively r_c and r_a . Lattice energy of AB is proportional to