LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – CHEMISTRY
SECOND SEMESTER – APRIL 2012
PH 2103/2100 – PHYSICS FOR CHEMISTRY – I
Date : 23-04-2012 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A
Answer ALL questions: (10×2=20)
- What are generalised coordinates?
- Define the term velocity. Write its unit.
- Write Newton’s law of gravitation.
- Write the principle of equivalence in gravitation.
- Write Hook’s law.
- Define surface tension of a liquid.
- What is a polaroid?
- Differentiate between Fresnel and Fraunhofer diffraction.
- Define unit cell.
- What is the significance of Miller indices?
PART – B
Answer any FOUR questions: (4×7.5 = 30)
- Explain the significance of velocity- time graph of a moving body.
- (i)Two bodies of mass 10kg and 25kg are placed at a distance of 0.2m apart. Find the force between them. G = 6067×10-11 S.I. units. (4.5)
(ii) Define parking orbit. (3)
- Discuss the atomic arrangement in a sodium chloride crystal .
- Briefly explain circular and elliptical polarization.
- Write in detail, the molecular theory of surface tension.
PART – C
Answer any FOUR questions: (4×12.5 =50)
- Derive Lagrange’s equation for a simple pendulum.
- (i)Write Kepler’s laws of planetary motion
(ii)What is escape velocity? Derive the expression for the escape velocity of a body.
- Derive Poiseuille’s formula for the flow of liquid through a capillary tube.
- Explain Bragg’s experiment of X-ray diffraction and arrive at Bragg’s law..
- Explain in detail, Fraunhofer diffraction at a single slit and arrive at the expression for the secondary maxima.
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