LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – APRIL 2012

PH 3202 – PHYSICS FOR CHEMISTRY – II

 

 

 

Date : 02-05-2012              Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

Answer ALL questions:                                                                                                              (10×2=20)

 

1. Convert the given decimal number into binary number 56.42.
2. State Demorgan’s theorem.
3. What is photoelectric effect?
4. State Pauli’s exclusion principle.
5. Write any two general properties of nucleus.
6. What are elementary particles?
7. Define absorption coefficient of material.
8. What are the two types of sound waves?
9. State Heisenberg’s uncertainty principle.
10. What is box normalization of wave system?

 

PART – B

Answer any FOUR questions:                                                                                                   (4×7.5 = 30)

 

11. Simplify the given Boolean function using K-map F(A,B,C,D)=∑(0,2,5,7,8,10,13,15)
12. Discuss about different types of photoelectric cells.
13. Explain nuclear fission reaction by using liquid drop model.
14. Describe the production of ultrasonic sound waves by Piezo-electric method.
15. Derive Schrödinger time dependent wave equation from the fundamental wave equation.

 

PART – C

Answer any FOUR questions:                                                                                                 (4×12.5 =50)

 

16. With a logic circuit and truth table describe the working of a JK flip-flop.
17. a) State the postulates of Bhor atom model (2.5)
18. b) Obtain the expression for the radius and electron energy of the nth orbit.    (10)
19. a) Write the semi-empirical mass formula to calculate the binding energy of the nucleus and explain each term in it. (10)
20. b) Draw a graph of binding energy per nucleon versus mass number. (2.5)
21. Derive an expression of reverberation time from Sabine’s law.
22. a) Find the de-Broglie wave length associated with a 46gm golf ball with velocity 36m/s. (2.5)
23. b) Describe Davisson and Germer experiment for the study of electron diffraction. (10)

 

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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)

1. What are generalised coordinates?
2. Define the term velocity. Write its unit.
3. Write Newton’s law of gravitation.
4. Write the principle of equivalence in gravitation.
5. Write Hook’s law.
6. Define surface tension of a liquid.
7. What is a polaroid?
8. Differentiate between Fresnel and Fraunhofer diffraction.
9. Define unit cell.
10. What is the significance of Miller indices?

 

PART – B

Answer any FOUR questions:                                                                                                  (4×7.5 = 30)

11. Explain the significance of velocity- time graph of a moving body.
12. (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)

13. Discuss the atomic arrangement in a sodium chloride crystal .
14. Briefly explain circular and elliptical polarization.
15. Write in detail, the molecular theory of surface tension.

 

PART – C

Answer any FOUR questions:                                                                                                  (4×12.5 =50)

 

16. Derive Lagrange’s equation for a simple pendulum.
17. (i)Write Kepler’s laws of planetary motion

(ii)What is escape velocity? Derive the expression for the escape velocity of a body.

18. Derive Poiseuille’s formula for the flow of liquid through a capillary tube.
19. Explain Bragg’s experiment of X-ray diffraction and arrive at Bragg’s law..
20. Explain in detail, Fraunhofer diffraction at a single slit and arrive at the expression for the secondary maxima.

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

THIRD SEMESTER – NOVEMBER 2012

PH 3202 – PHYSICS FOR CHEMISTRY – II

 

 

Date : 09/11/2012             Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

 

PART – A

Answer ALL questions:                                                                                                         (10×2=20)

1. Find the compliment of (A + B)(B + C)(C + A)
2. What are shift registers?
3. State Pauli’s exclusion principle.
4. Mention any two applications of X – rays
5. What is Bohr magneton?
6. Write down the semi – empirical mass formula.
7. What is the effect of humidity on the velocity of sound?
8. Distinguish between reverberation and echo.
9. Find the de Broglie wave length associated with a thermal neutron at room temperature 37^oC? k = 1.38 x 10^-23JK^-1 and h = 6.63 x 10^-34J s^-1
10. Write down the Schrodinger wave equation of a particle moving through a potential V = kx²

PART – B

Answer any FOUR questions                                                                                                (4×7.5=30)

11. Explain the working of a clocked R S flip flop using NAND gates.
12. Explain the formation of sodium doublet.
13. Write a short notes on any three properties of a nucleus.
14. With a neat circuit diagram explain the production of ultrasonic waves by Piezoelectric effect.
15. Using uncertainty principle, prove that electron cannot exist inside the nucleus and hence evaluate the Bohr radius.

PART – C

Answer any FOUR questions                                                                                                (4×12.5=50)

16. Realize using only NAND gates the following combinational circuit. Use K map to obtain the minimal expression
17. State the laws of photoelectric emission? Obtain Einstein’s photoelectric equation.
18. Study the variation of binding energy with atomic mass. Explain how this graph can be used to identify two mechanisms of nuclear energy.
19. Obtain Newton’s formula for velocity of sound in gases. Why did Laplace correct this expression? What is the correct expression?
20. With a neat schematic explain how the wave nature of a moving particle was established through Davisson – Germer experiment.

 

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