BSc Sem VI 2014 2015 2015 Chemistry 3 Question Paper - Mumbai University | munotes

Questions asked in this paper

• (2) Figures to the right indicate full marks

1. Q1 Attempt any three of the following :
   • (a) Explain the effect of presence on the rotational spectra. 5
   • (b) Define dipole moment and dipole moment. How does dipole 5 moment study help in differentiating between linear and non-linear
   • (c) What is Raman shift? Explain the origin of stokes and anti-stokes lines in 5
   • (d) Define force constant, The vibrational frequency of a diatomic molecule is 5 3.33 Calculate the force constant of the bond, if the reduced mass of the molecule is 1.2 kg
   • (e) Show that the frequency separation of successive lines in rotational spectrum 5 of a diatomic molecule is given by 2B, where B is rotational constant
   • (f) Derive expression for P and R branch lines in vibrational -rotational spectra. 5 any three of the following :
   • a) With respect to Lithium ion cell, explain cathode, anode and electrolytes 5 used in the cell, With respect to NMR, explain following terms. 5 tra of ethy Distinguish between low resolution spec the construction, working and electrode reactions of Bacon's Explain Lindemann's theory of unimolecular
   • (f) On the basis of rate of reactions, classify chemical reactions. State suitab}, 5 example for each class
2. Q3 Attempt any seven from the following :
   • (2) The number of modes of vibration for a non-linear are b
   • (3) Dipole moment is zero if the same substituents are at position j
   • (4) When for a molecule rotational spectra. 1s said to obey selection rule for
   • (5) The energy requi vibrations ng vibrations js that for bending
   • a) mo ) more than less than ( energy the ener
   • (a) 306 molecule posse
   • (7) Solar \ a cells work On the basis of
   • (8) Fydrogen is as the Promising fuel of futu
   • a) Te because of its
   • (c) Polluting
3. Q5 [ TURN OVER] protons in it and is used as 3 (10) The unit for chemical shift in NMR is
   • (11) Effective collisions are collisions which take place between Ultra-fast reactions can be studied using method
4. Q4 Answer any three of the following :
   • (a) Explain the effect of crystal field splitting on Jattice energy. 5
   • (b) Explain Russel coupling scheme. 5
   • (c) Draw a labelled molecular orbital energy !evel diagram for hexa fluoro ion comment on its magneticproperties Write any three merits and two demerits of crystal field theory Explain crystal field splitting in square planar comlexes. 5
   • (f) Explain the effect of 1 - on the value of 10 in case of cyano 5
5. Q5 Answer any three of the following :
   • (a) Explain the principles-involved in aerobic and anaerobic processes. 5 Write notes on the :- 5
   • (4) Discuss the structure and bonding involved in borazine. 5 What ere nanomaterials? Discuss the two dimentional nanoparticles. 5 Describe in detail the colloidal route method for preparation of nanomaterials. 5 ite the st appropriate answer from those given for the following 8 electron repulsions are in complexes metal ion than in a
   • (3) *D is the ground state term for
   • (4) 10 Dq value for tetrahedral complexes is of that for
   • (5) The number of microstates in P? configuration
   • (6) The terms for d' configuration are the same as that
   • (7) Oxygen demanding waste in water to of dissolved O,
   • (a) depletion (c) no change
   • (8) Removal of inoganic salts from the effluents can be done by process
   • (9) expressed O, required per litre of waste
6. Q10 The ;
   • (10) used treatment is
   • (c) Na,Co,
   • (11) The bond in borazine is
   • (12) The polymers that h atoms of on] ‘ one element in their backbone are
   • (c) hetero atomic

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