Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it.

Explain: Ionic solids are hard and brittle.

Explain the formation of energy bands in solids and hence define conduction band and valence band.

When arsenic is added an impurity to silicon, the resulting material is

How does the self inductance of an air coil change, when an iron rod is introduced in the coil?

Solution A gives pink colour when a drop of phenopthalein indicator is added to it. Solution B gives red colour when a drop of methyl orange is added to it. What type of solutions are A and B and which one of the solutions A and B will have a higher pH value?

Explain how the width of depletion layer in p-n junction diode changes when the junction is reverse biased.

In the radius of the anion in an ionic acid solid is 200pm, what would be the radius of the cation that fits exactly into a cubic hole:

When foreign DNA is introduced into an organisms, how is it maintained in the host and how is it transferred to the progeny of organism?