LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

FG 9

THIRD SEMESTER – APRIL 2008

PH 3202 / 3200 – PHYSICS FOR CHEMISTRY – II

 

 

 

Date : 05/05/2008                Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

PART-A

 

Answer all questions                                                                                            10×2=20marks

1. What are flip flops?
2. What is the difference between full and half adder.
3. State Pauli’s exclusion principle.
4. Give any two industrial applications of x-rays.
5. Calculate the binding energy of a Deutron. Given ₁P¹=1.0081amu, ₀n¹=1.00893amu,

₁H²=2.01473amu.

6. Describe Proton and Neutron using quark model.
7. State the laws of transverse vibrations of strings.
8. Mention two properties of ultra sonic waves.
9. State Heisenberg’s uncertainty principle.
10. Mention two situations where classical mechanics fails.

 

PART-B

Answer any four questions                                                                               4×7.5=30marks

 

11. Explain the working of a 3 bit counter using flip flops.
12. Explain the main aspects of photo electric effect using Einstein’s equation.
13. What are elementary particles? How they are classified?
14. How will you determine the velocity of sound waves in gas?
15. Obtain the energy of a particle in a one dimensional box.

 

PART-C

Answer any four questions                                                                               4×12.5=50marks

16. Explain the truth table of a full adder with a neat circuit.
17. State the postulates of Bohr atom model. Obtain expressions for the radius and energy of

the n^th orbit.

 

18. Explain semi empirical mass formula for the binding energy of the nucleus.
19. a) Explain how ultra sonic waves are generated by using piezo electric effect? (9.5)
20. b) Mention any two uses of ultra sonic waves. (3)
21. a) With relevant theory, explain Davison and Germer experiment for diffraction of

electrons.(10)

 

1. b) Calculate De Broglie wave length of an electron accelerated through a potential of

150 volts.(2.5)

 

 

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