Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitable example.

A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body - centre. What is the formula of the compound? What is the coordination numbers of P and Q?

What are the general characteristics of solids?

What are molecular solids? Explain the types of molecular solids.

An element with molar mass 2.7 x 10^-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 10³ kg m^-3, What is the nature of the cubic unit cell?

How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.

Explain the following: Similarities and differences between metallic and ionic crystals.

How are crystals classified?

What are stoichiometric defects in ionic solids? Explain

Write note on impurity defect?

Draw the structures of 14 Bravais lattices.

What are the characteristics of Ionic solids?

Derive an expression for the density of a crystal.

How will you calculate the density of an unit cell?