North Maharashtra University 2009 B.Sc Chemistry Colligative properties. - Question Paper

S.Y.B.Sc.-Paper-CH-221
Second Term Q.B. (Physical Chemistry)

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ques. of 2 marks.

1. describe the term Colligative properties of solution.
2. How many Colligative properties are their. provide their names.
3. describe the term solute and solvent.
4. describe the term actual solution.
5. describe the term Normality.
6. describe the term Molarity and Molality.
7. describe the term Mole fraction of solute in solution.
8. describe the term lowering of vapour pressure.
9. describe the term relative lowering of vapour pressure.
10. provide the statement of Raoult’s legal regulations of partial pressure.
11. provide the applicability of Raoult’s legal regulations of partial pressure.
12. What do you mean by elevation of boiling point.
13. Draw vapour pressure-temperature diagram for solvent and solution.
Comment on it.
14. Why vapour pressure curve of solution lies beneath that of solvent curve?
15. provide the factors on which elevation of boiling point depends.
16. describe the term molal elevation constant / Ebullioscopic constant.
17. What do you mean by depression of freezing point.
18. describe the term molal depression constant / Cryoscopic constant.
19. provide the relation ranging from depression of freezing point and molecular
weight of non-volatile solute.Signify the term involved in it.
20. What do you mean by semi-permeable membrane?
21. describe the term Osmosis.
22. describe the term Osmotic pressure.
23. describe the term Van’t Hoff factor.


ques. of 3 marks.

1. What is relative lowering of vapour pressure? discuss why vapour
pressure of solvent reduces by dissolving non-volatile solut in it.
2. discuss how relative lowering of vapour pressure is used to determine
molecular weight of the non volatile solute.
3. Show that relative lowering of vapour pressure of a solvent is equal to the
mole fraction of non-volatile solute.
4. Why boiling point of solvent is elevated on addition of non-volatile solute.
provide the relation ranging from elevation in boiling point and concentration of
solute.
5. What is elevation in boiling point? Write the relation ranging from elevation in
boiling point and molality of solution.
6. describe ebullioscopic constant.How it is related to molar heat of
vapourisation.
7. describe molal elevation constant. discuss how it is useful to determine
latent heat of vapourisation.
8. Derive the relation ranging from elevation in boiling point and molecular weight
of non-volatile solute.
9. Why freezing point is depressed on addition of non-volatile solute. provide

Earning:   Approval pending.