Briefly describe the principles of the followig techniques, taking an example in each case.
Paper chromatography

Briefly describe the principles of the followig techniques, taking an example in each case. Distillation under reduced pressure

Briefly describe the principles of the followig technique, by taking an example. Crystallization

Briefly describe the principles of the followig technique, by taking an example. Simple distillation

Describe the principle of extraction of each of the following (b) Zn from Zn O

Briefly explain different types of neutrologically active drugs and give example for each type.

Briefly explain the dlfferents types of emulsions and give example for each.

What is meant by the following terms ?.Give an example of the reaction in each case. i. Cyanohydrin ii. Acetal iii. Semicarbazone- iv. Aldol v.Heniacetal vi. Oxime vii. Ketal viii. Imine ix. 2,4-DNP-derivative x. Schiffs base

Discuss briefly with an example in each case the role of coordination compounds:- Analytical chemistry.

Explain the reason for non ideal behaviour shown by liquid mixtures? Give one example for each case?

Atoms possessing stable configuration have less tendency to loss and consequently will have high value of ionization enthalpy. a) Justify this statement by taking the case of halffilled and completely filled configurations. b) The noble gases have highest ionization enthalpies in each respective periods. Why?