What is imperfection in solids?

(a) What is coagulation of sol ? name two methods by which a lyophobic sol can be coagulated. (b) What is the change in enthalpy and entropy during adsorption of gas on a solid ?

What are covalent solids or network solids? Give examples.

What type of crystalline solid is graphite ?

What is known as solid waste management practices ?

What is Frenkel defect? What is its effect on the density of the solid?

What is meant by the term coordination number in solids? What is the coordination number in a face centered cubic close packing structure?

(a) Calculate the number of particles in Face Centred Cubic (FCC) lattice. (b) What is Frenkel defect? What is its effect on the density of a solid?

What is the sign of DeltaS for the adsorption of gas on solids?