What do you understand by activity and selectivity of a catalyst ? Give one example of each.

What do you understand by DNA?

What do you understand by capillarity?

What do you understand by couple?

What do you understand by nutrition?

What do you understand by biopiracy?

What do you understand by a wavefront?

What do you understand by ductility and malleability of a metal? Give examples of two metals which are both ductile and malleable.

What do you understand by pollution ?