CLASS: B.SC. PHYSICS
J201A7
ST. JOSEPH’S COLLEGE (AUTONOMOUS), TIRUCHIRAPPALLI - 620 002
SEMESTER EXAMINATIONS – APRIL 2007
TIME: 3 Hrs.
MAX. MARKS: 100
SEM
SET
PAPER CODE
SUBJECT
IV
2005
04UPH474
ALLIED OPTIONAL: GENERAL CHEMISTRY – II
SECTION – A
Answer all the questions:
10 x 3 = 30
1. Predict the products of the following reactions:
Br2
a) Glucose
?
H2 O
b) Glucose + Nitric acid
?
2. Define isoelectric point?
3. Define primary and secondary valencies in coordination chemistry.
4. Write the structures of the following compounds:
i) Triammine trinitrocobalt (III)
ii) Lithium tetrahydroaluminate (III)
iii) Hexammine cobalt (III) chloride.
5. What are the good characters associated with gaseous fuels?
6. Write a note on soda glass.
7. Define the following:
i) Phase
ii) Monotoropy
8. Write a note on thin layer chromatography.
9. Define coulomb and ohm.
10. 0.1978g of copper is deposited by a current of 0.2 ampere in 50 minutes. What is the
electrochemical equivalent of copper.
SECTION – B
Answer all the questions:
5 x 14 = 70
11. a. Discuss the electrophilic substitution reactions of Furan and
pyridine.
(14)
(OR)
b. Write short note on the following:
i) Gabriel phthalimide synthesis.
(4)
ii) Secondary structure of protein.
(5)
iii) Preparation and uses of Teflon and PVC.
12. a.
Write the basic rules regarding the Nomenclature of
(7)
(5)
coordination compounds.
b. Write the structures of the following compounds:
i) Potasium hexacyanoferrate (II)
(1)
ii) Potassium pentacyanonitrosyl ferrate (II)
iii) Tetra pyridine platinum II tetracholoroplatinate II.
(1)
(1)
iv) Dichloro bis (methylamine) copper II.
v)  - amido bis [pentammine cobalt (III)] nitrate.
(2)
(2)
(OR)
c. Apply valence bond theory to octahedral complexes.
(7)
d. Write note on optical isomerism in coordination compounds. (7)
13. a. Explain the preparation of Ceramics.
(7)
b. Discuss the preparation, properties and uses of silicones.
(OR)
c. Write note on the following:
(7)
i) Portland Cement.
(7)
ii) High alumina cement.
(7)
14. a. State phase rule and define the terms involved. Explain the
sulphur system on the basis of phase rule.
(10+4)
(OR)
b. Write the phase rule for two component system. Explain the phase diagram of silver
– lead system.
(4+10)
15. a.
Define the terms specific conductance, equivalent conductance
and cell constant. Explain clearly why at dilution equivalent conductance increases
and specific conductance decreases? (10)
b. 0.5N solution of a salt placed between two platinum electrodes, 20cm apart and of
area of cross section 4cm2 has a resistance of 25ohms. Calculate the equivalent
conductance of the solution.
(4)
(OR)
c. With graphs, explain the following conductometric titrations.
i) Strong acid with strong base.
ii) Weak acid with strong base.
(6)
d. What are the advantages of conductometric titrations over
ordinary titrations.
e. Calculate the equivalent conductance at 200C of NH4OH at infinite dilution.
(4)
Given (NH4Cl) = 130 , 
(OH  ) =174 ,  (Cl  ) = 66.
***************
(4)