Cochin University of Science and Techology (CUST) 2006-1st Year B.Tech engineering chemistry - Question Paper

1st TERMINAL exam DECEMBER 2006
ENGINEERING CHEMISTRY


Time:2 Hrs

I 1) describe standard hydrogen electrode

2) Derive the equations for the rate constant of zero order & 1st order reactions.

3) What is emf of a cell? How is it measured?

II 1) discuss metal-metal insoluble salt electrode. Illustrate with an eg.

2) What is half life period? Derive an expression for the half life period of 3rd order
Reaction.

3) explain about reference electrode.

III 1) provide a brief short note on concentration cells.

2) elaborate solar cells? discuss its principle?

3) explain about fast reactions. discuss the technique to study their kinetics.

IV 1) explain about Fuel cells . Illustrate with an eg.

2) provide an expression which provide the relation b/w rate constant & Activation
energy.. discuss the terms in it.

3) discuss the working of lead acid cell.

V 1) discuss the polarization in voltaic cell.

2) What is the buffering action of acetic acid-sodium acetate mixture? Derive
Henderson’s formula

3) discuss the Lewis concept about acids & bases.

VI 1) Derive the relationship b/w Ph& Poh.? What is its significance? Derive an
expression to study Acidity constants.

2) What is Salt bridge ? elaborate its functions?

3) provide short notes on : Over voltage & Polarization.
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Earning:   Approval pending.