Explain the formation of mirage.

Explain the formation of a chemical bond.

Explain the formation of placenta after implantation in a human female.

What are energy bands? Explain the formation of energy bands in case of silicon crystal.

Explain the formation of molecular orbitals by linear combination of atomic orbitals (LCAO).

Explain the formation of H2 molecule on the basis of valence bond theory.

Name two different types of waves. Give an experiment to explain the formation of transverse waves.

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

Long Answer Questions Five mark Each QUESTIONS FROM STATE BOARD EXAMINATIONS : Explain the formation of embryo sac in plants.