Explain formation of clouds at high altitude.

Explain the formation of Mirage .

What is an impurity defect? What are its types? Explain the formation of vacancies through aliovalent impurity with example.

Explain the formation of chemical bond.

Explain Gemmule formation.

Explain the formation of sodium chloride (NaCl) molecule.

Explain formation of stationary wave on astretched string. Show that the distance between node and adjacent antinode is lambda//4 .

Write a note on Secondary Rainbow OR Explain the formation of a secondary rainbow. For which angular range with the horizontal is it visible.

Explain the formation of a primary amine from alkyl halides ammonolysis.

Explain formation of concave and convex surface of liquid on the basis of molecular force.

Observe the diagram and explain the formation of cyst in Amoeba during during multiple fission.