Chemistry Practice Test: Electrolysis (Questions with Answers and Explanations)

What quantity of aluminium is deposited when a current of 10 A is passed through a solution of an aluminium salt for 1930 s? [Al =27, F = 96500 C mol^-1] (JAMB 2010)

A. 5.4 g       B. 14.2 g       C. 0.2 g       D. 1.8 g

What amount of mercury would be liberated if the same quantity of electricity that liberates 0.65 g of zinc is applied? [Zn = 65, Hg = 201] (JAMB 2002)

A. 8.04 g      B. 4.02 g      C. 2. 10 g    D. 1.00 g

Calculate be amount in moles of silver deposited when 9650 C of electricity is passed through a solution of silver salt. (1F = 96500 C mol^-1) (JAMB 2017)

A. 0.03      B. 10.80      C. 10.00      D. 0.10

Calculate the volume in cm³ of oxygen evolved at s.t.p when a current of 5A is passed through acidified water for 193s. [F = 96500 C mol^-1, Molar volume of a gas at s.t.p = 22.4 dm³] (JAMB 2013)

A. 0.224      B. 56.000     C. 224.000     D. 0.0056

How many coulombs of electricity will be required to deposit 6.11 g of silver from a solution of silver salt? [Ag = 108, 1F = 96,500 C] (JAMB 2021)

A. 5,459.4 C
B. 1,819.5 C
C. 2,729.7 C
D. 10,918.8 C