Electrolysis - Jamb Chemistry Past Questions and Answers

Question 96:

• JAMB 2015

In the electrolysis of brine the anode is

A. Platinum
B. Copper
C. Zinc
D. Carbon

Question 97:

• JAMB 2016

In an electrochemical cell, polarization is caused by

A. Oxygen
B. Hydrogen
C. Tetraoxosulphate(IV) acid
D. Chlorine

Question 98:

• JAMB 2017

Calculate the amount in moles of silver deposited when 9650C of electricty is passed through a solution of silver salt [= 96500 Cmol^-1]

A. 0.05
B. 10.80
C. 10.00
D. 0.10

Question 99:

• JAMB 2017

Calculate the mass of copper deposited when a current of 0.5 ampere was passed through a solution of copper(II) chloride for 45 minutes in an electrolytic cell. [Cu = 64, F = 96500Cmol^-1]

A. 0.300g
B. 0.250g
C. 0.2242g
D. 0.448g

Question 100:

• JAMB 2018

A correct electrochemical series can be obtained from Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging

A. Al and Mg
B. Zn and Fe
C. Zn and Pb
D. Pb and H