LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – CHEMISTRY
THIRD SEMESTER – NOVEMBER 2010
PH 3202 – PHYSICS FOR CHEMISTRY – II
Date : 12-11-10 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART-A
Answer all the questions. 10×2=20
- Subtract the given binary numbers by 2’s complement method, 10001 – 01110
- State De-Morgan’s law.
- What is photoelectric effect?
- State Pauli’s exclusion principle.
- What is mass defect?
- What is inverse Piezo-electric effect.
- What are elementary particles?
- A microscope, using photons, is employed to locate an electron in an atom to within a distance of 0.2Ǻ. What is the uncertainty in the momentum of the electron located in this way?
- Mention any two factors that affect the acoustics of a building.
- What are matter waves?
PART-B
Answer any four questions. 4×7.5=30
- With a neat circuit diagram and truth table explain full binary adder.
- Describe Millikan’s experiment to verify the Einstein’s photo electric equation.
- Obtain the Newton’s formula of velocity of sound.
- Describe the liquid drop model of the nucleus.
- Derive Schrodienger time dependent wave equation from the fundamental wave equation.
PART-C
Answer any four questions 4 x12.5=50
- a) What is Karnaugh map (K map) method? (2)
- b) Simplify the Boolean function F(A,B,C,D) = ∑(0,1,2,4,5,10,11,14,15) using K-map. Design a logic circuit of the simplified equation. (7.5+3)
- a) State the postulates of Bohr’s atom model. (2.5)
- b) Obtain expressions for the radius and electron energy of the nth orbit. (10)
- a) State Sabine’s law (2.5)
- b) Derive the expression for reverberation time from Sabine’s law (10)
- Describe the Davisson and Germer experiment for the study of electron diffraction.
- Give a detailed account of the general properties of a nucleus.
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