Solapur University Fundamentals of Chemistry and Biophysics 2015 Question Paper

Solapur University
B.Sc. – I (Semester – I) Examination, 2015
BIOTECHNOLOGY (CGPA Pattern)
Fundamentals of Chemistry and Biophysics
Day and Date : Thursday, 16-4-2015 Max. Marks : 70
Time : 11.00 a.m. to 2.00 p.m.
 N. B. : 1) All questions are compulsory.
2) Figures to the right indicate full marks.
3) Use of log-table/calculators is allowed.
SECTION – I
(Chemical Science)
1. Select the most correct alternative from among those given below and write the
complete sentence. : 5
i) Two Cl atoms are joined by ______________ bond in Cl2 molecule.
a) ionic b) covalent
c) co-ordinate d) metallic
ii) Formation of ethane molecule involves ____________ hybridization of carbon.
a) SP b) SP2
c) SP3 d) SP3d
iii) Entropy of universe tends towards ______________
a) Maximum b) Minimum
c) Both a) and b d) None of these
iv) H2 + I2 → 2HI is ______________ reaction.
a) unimolecular b) bimolecular
c) termolecular d) psedounimolecular
v) Glass electrode is selective for ______________ ions.
a) K+ b) H+
c) Mg++ d) Cs+
2. Answer any five of the following : 10
i) Define the term dipole moment and give its significance.
ii) What is hybridization ? Mention its types.
iii) What is intramolecular hydrogen bonding ? Give one example.
iv) What is colligative property ? Mention two examples.
P.T.O.
SLR-M – 4 -2-
v) Define the terms order and molecularity of reaction.
vi) What is Gibbs free energy ? How it is symbolized.
vii) Explain common ion effect.
3. A) Attempt any two of the following : 10
i) What are ionic solids ? Give examples and write their general
characteristics.
ii) Time for half change in a first order reaction is 25 min. How much it will
take to complete 99.9%.
iii) Explain the terms osmosis and reverse osmosis with examples.
B) Answer any one of the following : 10
i) What are different types of electrodes ? Give construction and working of
glass electrode.
ii) Define catalysis. Explain its types, give examples and characteristics of
enzyme catalyzed reaction.
SECTION – II
(Biophysics)
1. Select correct alternative from the following : 5
i) The phenomenon of bending of path of light waves at an edge of obstacle is
called ______________
a) reflection b) diffraction
c) refraction d) interference
ii) Ink rises in a pen due to ______________
a) viscosity b) capillary action
c) elasticity d) none of these
iii) ______________ indicates the resistance of elastic solid to elongation.
a) Bulk modulus b) Elastic limit
c) Young’s modulus d) Modulus of rigidity
iv) The angle of contact is ______________ for the liquid which does not wet the
solid.
a) zero b) acute
c) right angle d) obtuse
v) If V is the velocity of a fluid through a pipe of cross sectional area A then the
relation between them is ______________
a) V∝A b) V∝A2
c) V∝ A
1
d) V∝ 2 A
1
-3- SLR-M – 4
2. Answer any five of the following : 10
i) Define (a) Surface tension (b) Angle of contact.
ii) Define (a) Stress (b) Strain.
iii) What is the effect of pressure on viscosity of a liquid ?
iv) State the relation between surface tension, excess pressure and radius of curvature.
v) State Hooke’s law.
vi) Define coefficient of viscosity.
vii) What do you mean by (a) Mechanical waves (b) Electromagnetic waves ?
3. A) Attempt any two of the following : 10
i) Explain the working of Pitot tube.
ii) What is elasticity ? Explain the importance of elasticity.
iii) Discuss the factors affecting surface tension.
B) Attempt any one of the following : 10
i) Describe construction and working of Helium – Neon Laser.
ii) How beats are formed ? Obtain an expression for frequency of beats.

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