How will you differentiate between `S_(N^1)` and `S_(N^2)` reaction mechanism ?

Difference between S_N1 and S_N2 reaction ?

Derive an expression for true power and virtual power of an a.c. circuit. How will you differentiate between true power and virtual power?

Differentiate between S.A node and A.V. node.

How can you differentiate between free central and axile placentation?

How do you differentiate habitat from environment?

How do you differentiate between capture fishing, mariculture and aquaculture?