Nalanda Open University 2009 B.Sc Chemistry Bachelor of Science ( Hors), Part-II Final -III ( (Hons.)) - Question Paper
Bachelor of Science (Chemistry Honours), Part-II Final exam 2009 Paper-III (Chemistry (Hons.))
Bachelor of Science (Chemistry Honours), Part-H Final Examination, 2009 Paper-HI (Chemistry (Hons.)) lime: 3.00 Hi's. Full Marks: 75
Answer any Five Questions. AH questions carry equal marks.
1.. What is concentration cell? What do you understand by concentration cell without transference? Deduce an expression for concentration cell with transference.
Calculate solubility product of Silver-b-ropnde lfthe reduction potential ofthe electrode Ag/AgBr(s).
KBr(0.1 M) is 0.092 Volt at 25C and E Ag+/Ag = 0.80V;..
2. What is carnot's theorem? How is this theorem established..-
3. What are basic assumptions of valence-bond theory for complex compound formation? Exp lain it Hi:the. formation ofK4[Fe(CN)g] and [C&Fp". Explain th'g Limitation of this .theory;
4. (a) What do you understand by dual; character of'matter? Derive de-Broglie relatioii How was
it verified experimentally?
(b) How arematterwave different from edectrofriagnetic wave. Why is the wave ;hat.ure-. of-matter not'apparent'.in our daily life'?-
5. (l) Define and explaiii the following term;;
(a) Nuclear binding energy
(b) Mass .defect
(c) Packing fraction
5.. What do you mean by terrri trailsitioh metals? How ai'e they subdeyide'd in various series? How do'the atomic radii and ionisation potential vary with increase'.in' atomic number?
7. (i) Write dowrithfe I.U.P.A.C. name of following compounds/io.ii.
nh2
(a) [Fe(CN)6]-3 (b) [CNH3)4CO< ">CO(NH3)4J
T
(c) [Co(NH3)5Ci]C72 (d) [Pt(NH3)4] [PtCi4]
(ii) Derive an expression for the relation between the stepwis.e formation (K) and over all formation constant (B).
3.. How is so'diumthio sulphate prepared. Give its reaction with
(a) AGN03 (b) HCi (c) CuS04
Write important ores narfie:-and their formula. Extract Ni in pure from its ore. How does iiickel react with (a) HN03 (b) CO gas (c) Cone &hotH2S04
10.(a) Write the chemical e'quBitioiis mvolvmg;atiiration of Copper (II) with sodrudfa'thiosulphate in presence of potassium iodide.
(b) Give the principle involved in gravimetric estimation 6f BarnifeL.
(c) Potassium permaganate solution can not be taken as primary standard. Why?
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