Amrita Vishwa Vidyapeetham 2011 B.Tech Electronics and Communications Engineering First semester periodical test-II chemistry , - Question Paper

Amrita Vishwa Vidyapeetham
Amrita School of Engineering,Bangalore Campus
B.Tech. Periodical Test-II, October 2011
Course code & title: CHY 100/CHEMISTRY Branch & Sem:I/combined

Date & Time : 21.10.11 & 8.30 to 10.30 AM Max Marks:50


Part A (5*2=10 marks)

1.What is the maximum degree of freedom possible for a single component system?

2.In Ellingham diagram, the metal to metal oxide curve for Hg indicates a sudden abrupt change at approximately 356 degree centigrade .give cause.

3.Predict the number of phases containing sand, charcoal, water, water vapour

4.Find the number of degrees of freedom
NH3(g)+HCl(g)(excess)-->NH4Cl

5.Write the conditions which facilitate the formation of meta stable curve.



Part B (40 marks)

6.Construct a phase diagram for a metal alloy system of components A and B. The melting point of a component A is 275 degree centigrade and that of a B is 103 degree centigrade. The eutectic point of as system has been obtained to be 93 degree centigrade. obtain out the number of degrees of freedom at various points, curves and areas. [5 Marks]

7.Why the metal oxide curves in Ellingham diagram show positive slope? Justify your ans with thermo dynamical concepts.[6 Marks]

8. Carbon dioxide is good reducing agent beneath 710 degree centigrade whereas carbon monoxide is preferred above this temperature .justify. [4 Marks]

9. a)Explain the application of phase rule in Pattinson's process.[6 Marks]
b)Discuss the applications and limitations of phase rule. [4 Marks]

10.Define phase rule. discuss the terms involved with examples. With the help of a neat sketch, discuss in detail the applications of phase rule to a 1 component system. [10 Marks]

11.Define and compare the terms triple point and eutectic point with examples. [5 Marks]

Earning:   Approval pending.