chemistry -3 paper

8/7/2019 Chemistry -3 Paper

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DISTRICT RESOURCE CENTRE

MAHBUBNAGAR

B.Sc., PRE-FINAL EXAMINATIONS - JAN / FEB -2011

Time :3 Hours CHEMISTRY Paper III Max Marks : 100

SECTION A 4x15= 60Answer any two bits from each question.

1. (a) (i) Discuss the crystal field splitting of octahedral complexes.

(ii) Write the IUPAC names of the give complexs

(a) K4[Fe(CN)

6] (b) [Ni(CO)

4] (c) Li[AlH

4] (d) [CO(NH

3)H

2O]Cl

3

(b) Explain the SN and SN Mechanism in inorganic Compounds.

(c) How are organo metallic compounds classified, give each one example.

(d) Describe the importance of Iron and Cobalt in biological system.2. (a) Compare the aromatic behaviour and explain the electrophilic substitution

in furan, thiophene and pyrrole.

(b) Discuss the open chain structure of glucose.

(c) Prepare glycine, leucine from Gabriell's method.

(d) How can separate the pri, sec & tert amines by Hinsbergs method.

3. (a) (i) Write the differences between order and molecularity.

(ii) Derive the equation for the first order rate constant.

(b) State the law of photochemical equivalence . Given the reasons for abnormal

quantum yield.

(c) (i) State and explain the first law of thermodynamics.

(ii) Explain the intensive and extensive property.

(d) (i) Derive the relation between Cp

and Cv

.

(ii) Explain the importance of Gibbs Helmholtz equation

SECTION B 4x5= 20

4. (a) Write about the stereoisomerism of the complexes.(OR)

(b) Discuss Pearson method of classification of HSAB.

5. (a) What is effective atomic number (EAN) and calculate the EAN of the

central metal ion in the given complexes.

(i) [Ni(CO)4] (ii) K

3[Fe(CN)

6] (iii) [COCl

3(NH

3)

3]

(OR)

(b) Discuss the structure of chlorophyll and explain its role in photosynthesis.

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6. (a) (i) Convert an aldopentose into an aldohexose.

(ii) Define the terms mutarotation and epimerization.

(OR)

(b) Write the reactions of phenyl diazonium chloride with

(i) HBF4

(ii) H3PO

2(iii) KCN

7. (a) Write an account of the aromatic character of pyridine.(OR)

(b) (i) Define the terms Isoelectricpoint and Zewitterion.

(ii) How are - amino acids are prepared starting from malonic ester.

8. (a) Determine the molecular formula by using mass spectra of (M+1) and (M+2)

peaks for 1-propanal.

(OR)

(b) Write the basic principle of the mass spectrum.

9. (a) What are toxic effects of Hg, Pb and As.

(OR)

(b) Give the importance of Grignard reagent in organic synthesis.

10. (a) What are Arrhenius parameters. Discuss the temperature effect on the rate

of the reaction.

(OR)

(b) How will you determine the order of the reaction give any two methods.

11. (a) Write the differences between the fluorescence and phosphorescence by

using Jablonski's method.

(OR)

(b) Derive the equation for entropy change when the system is expands

isothermally and reversibly.

12. (a) Deduce the Kirchoffs equation.

(OR)

(b) Derive expression for the efficiency of heat engine by carnots cycle


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DISTRICT RESOURCE CENTRE

MAHBUBNAGAR

B.Sc., PRE-FINAL EXAMINATIONS - JAN / FEB -2011

Time :3 Hours CHEMISTRY Paper III Max Marks : 100

SECTION A 52 Marks

@y s+&T _{\qT yjT+& .

1. (a) (i) d{ d


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5. (a) |u$ |seDT d+K nq> H$T? +~ d+w\ +

chemistry -3 paper

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