Osmania University (OU) 2011-4th Year B.E Chemistry, 1/, Diagnosis test, Affiliated Vasavi College - Question Paper

DEPARTMENT OF CHEMISTRY

I year B.E - Assessment Test (ECE I) for the year 2011-2012

Time: S0m(ns    Max mark*: 20

Part A Answer all questions. (3 x2 *6 marks)

1.    Differentiate galvanic & electrolytic cells

2.    Define single and standard electrode potentials.

3.    Can we store Ag NCb solution In a copper vessel? Give reasons.

Part - B Answer any two questions.

4.    a) Write the cell notation and reaction and calculate the E.M F of the cei consisting of the

electrodes Cd/Cd²*( 0.5M) and Cu²* (Q.QSyCu. E* of Cd *7 Cd = -0.40V andCu/Cu = +034V.    (3 M)

b) Derive Nemst equation for an electrode    (4 M)

5.    a) Write the applications of electro chemical series.    (3 M) b) Write the discharging and recharging reactions involved in Lead Add battery.(4M)

6.    a) Draw diagram of Zinc - Carbon Battery. Write the reactions & appfications. (5 M) b) Give one example of a Metal - Metal insoluble salt electrode. Write the

notation and reaction and uses.    (2M)

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Attachment: osmania-university--ou--2011-b-e-48035-1.jpg

Earning:   Approval pending.