Difine the cell.

Difine the term 'subculture'.

Difine ther terms Work function with reference to photoelectric effectd.

Difine the following terms : (i) Pepization (ii) Zeta potential (iii) Brownian movement.

Difine buckyball. How is it made ?

Difine the environmental pollulant. What do you understand by an environmental pollution model ?

The relation R difined the set Z as R = {(x,y) : x - yin Z} show that R is an equivalence relation.

Difine a chemical reaction. Which observations help you to determine whether a chemical reaction has taken place ?