(a) Based on the nature of the intermolecular foces, classify solids benzene and silver.
(b) AgCl shows frenkel defect while NaCl does not. Give reason.
(c) What type of semi-conductor is formed when Ge is doped with Al ?

Explanation

(a) Benzene is a molecular solid while silver is a metallic soild.
(b) In AgCl, the difference in the radii of `Ag^(+)` and `Cl^(-)` ions, is more as compared to that of `Na^(+)` and `Cl^(-)` ions.
(c) p-type of semi-conductors are formed.