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XII Semester

M.Sc.Ed.

May 2014

(Scheme: RIE) Chemistry Solid State Chemistry

, Time:

Examination,

3 Hours

Max. Marks:

Instruction:

80

Your answer should be brief and specific.

1 a) Derive Bragg's equation and explain the terms. b) Explain the method of indexing the single crystal rotation X-ray photography. c) Calculate the molecular

weight of a substance

cubic lattice with unit translations is 1.984 g/cm3,

which forms a face centered

equal to 3.6 A .The density of the substance (6+6+4=16)

OR

2 a) Discuss the theoretical by electron diffraction

principles technique.

b) Describe the radial distribution electron diffraction . c)

Explain

Schottky

function in the determination

dependence

of conductivity

Explain

by

of semiconductors.

effect and luminescence.

(6+6+4=16)

of n-p-n function.

treatment

of BCS theory of super conductivity,

c) Explain type I and II superconductors. a)

of structure

(6+7+3=16)

OR a) Discuss the operations b) Give an elementary

5.

of structure

between instrinstc and extrinsic semiconductors

c) Explain photostatic 4,

the determination

defects

3 a) Discuss the temperature b) Differentiate

underlying

the theoretical

models

(6+6+4=16)

of nanoparticles.

b) Discuss the synthesis of metal oxides and their composite solvothermal and hydrothermal methods. c) Give any four differences

between

nanoparticles

nanoparticles

by

and bulk materials. (6+6+4=16)

OR P,T.O.

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6. a) Discuss the magnetic b) Explain the synthesis

and electrical applications of organic nanomaterials.

c) Discuss the effect of temperature 7

a) Differentiate

of nanomaterials,

on nanocrystal

properties.

(6+6+4=16)

between metals, insulators and semiconductors

b) Discuss the band theory of metals c)

Write

a note

an super

conductors.

(6+6+4=16)

OR

8. a) Discuss b) Briefly c) Write

the optical discuss

properties

of solids.

the classification

of materials

a note on hysteresis.

(5+6+5=16)

9. a) What are Miller indices ? Sketch 100 and 110 planes in cubic lattice

b) Explain Josephson

devices in supercpnductors.

c) Discuss the thermodynamics

of Frenkel defect formator.

(5+5+6=16)

OR 10. a) Give an account of industrial applications b) Explain the effect of pH on nanocystral c)

Discuss

doping

of semi

conductors.

of semiconductors

properties.

(5+5+6=16)