Kakatiya University (KU) 2009 B.Sc Chemistry - Question Paper

B.Sc DEGREE exam MAY 2009
4th Semester
CHEMISTRY(Optional)
Time:Three hours Maximum:80marks
All ques. are compulsory.
ans all the ques. in the identical ans book.
Draw neat diagrams and provide formula wherever necessary.

I.Answer any TEN of the following:

1.what is common-ion effect?

2.what is B.O.D.?

3.Give the general electronic configuration of f-block elements.

4.cu+1 compound are colourless.why?

5.Write the reaction ranging from aldehydes and alcohols in presence of dry hydrogen chloride.

6.Give the IUPAC names of:
(a)CH3-CH2-CO-CH-CH3
!
CH3
(b)CH3-CH-CH2-COOH
!
OH

7.Give the classification of aromatic amines with example.

8.How are Ethers prepared by Williamson's Ether Synthesis?

9.Finely divided substance is more effective adsorbent.Give cause.

10.State phase rule ans provide its formula.

11.What is electroosmosis?

12.What is homogeneous catalysis?Give an example.

II.Answer any 6 of the following:

13.What is preliminary,primary and secondary tretment of sewage water?

14.Explain the conditions needed for precipitation in gravimetric analysis.

15.What is d-d-electronic transition? discuss with an example.

16.How is Uranium extracted from pitch blende?

17.What is the action of conc.sodium hydroxide solution on benzaldehyde ? Name the reaction and write its mechanism.

18.Explain the hydrolysis of ester by Aa2-mechanism.

19.How is benzenediazonium salt converted into (a)chlorobenzene (b)phenyl hydrzine (c)anilin (d)parahydroxy azobenzene (e)iodobenzene?

20.Give a method of synthesis of epoxides.Explain the acid catalysed ring opening reaction of epoxides.

21.Explain the term (a)component (b) degree of freedom.

22.Give the differences ranging from physical adsorption and chemisorption.

23.Explain (a)zeta potential (b) electrophoresis.

24.Derive Van't Hoff's reaction isotherm.

III.Answer the following:

25.(a) elaborate d-block element? discuss the subsequent properties of d-blok elements
(i)Electronic configuration
(ii)Complex formation

(b) What is ment by solubiliy product? Precipitation is carried out in dilute solution.Why?

26.(a) define the separation of lanthanides by ion-exchange method.

(b) define the laboratory method of determination of C.O.D.

IV.Answer the following:

27.(a) What is aldol condensation? discuss its mechanism.

(b) provide the comparative study of acid strengths of nitro and hydroxy substituted benzoic acids.
Or

28.(a) discuss the subsequent reactions with examples:
(i) Hell Volhard Zelinsky reaction
(ii) Gabriel-Phthalimide reaction

(b) provide the synthesis of (i) Coumarine (ii) Vanillin.

V. ans the following:

29. (a) Draw a neat labelled phase diagram of sulphuar system and explain its salient features.

(b) Write B.E.T. formula.Name the terms involved.
Or
30. (a) Derive Langmuir's adsorption isotherm.Discuss its forms at low and high pressures.

(b) discuss the stability of colloids.

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Earning:   Approval pending.