Nalanda Open University
Annual Examination 2016
B.Sc. Chemistry (Honours), Part-II
Paper-III
Time: 3.00 Hrs. Full Marks: 80
Answer any Five questions. All questions carry equal marks.
1. What do you understand by reversible and irreversible cell? Deduce an
express on for the concertation of cell with transference.
2. Explain work function and Gibb's free energy. Derive Gibb's Helmblotoz
equation.
3. Describe Milkan's oil drop method for determination of charge of an
electron.
4. What are molecular formula of Caro's and Marshall's acid? Discuss the two
methods of preparation and properties. Write down their proof.
5. What do you mean by term transition elements? Give reasons to explain
the following:
All most all transition metals form complex compound why?
Generally transition metals are para magnetic.
Generally compounds of transition metals are colored Why?
6. How potassium per magnet is prepared on large scale? How does KMNO4
reacts with:-
H2s in acid medium
Oxalic acid in presence of H2so4
Ki in acid medium calculate equivalent weight of KMN04 in different
medium.
7. What are important ores of Nickel? Isolate large amount of Nickel in pure
state from its Sudbury ore. Explain that nickel shows properties of
transition element.
8. What are silent feature of valence theory for complex formation Write down
its limitation Explain, why is diamagnetic and square planner.
9. What do you understand by terms given below used in nuclear Chemistry
.
Nuclear stability Packing fraction
Mass defect Nuclear Binding energy.
10. Write notes any two:
Silica Gel
Silicones
Sodium Thio sulphate.