Chemistry Past Questions

Exam Type:

Exam year:

Question Type:

Topics:

2546

What mass of copper would be formed when a current of 10.0 A is passed through a solution of CuSO₄ for 1 hour? [Cu = 63.5; 1F = 96500C]

View Answer & Discuss (6) WAEC 2011

2547

Which of the following metals could be used as sacrifical anode for preventing the corrosion of iron?

View Answer & Discuss (7) WAEC 2011

2548

Consider the following electrochemical cell notation: M(s) / M2+ (aq)// H+ (aq)/ H2(g). The value of the electrode potential is positive when?

A. electrons flow from the metal electrode, M_(s) to hydrogen electrode, H_2(g)
B. electrons fow from hydrogen electrode, H_2(g) to metal electrode, M_(s)
C. the flow of current is high
D. there is equilibrium between the flow of electrons from the hydrogen electrode, H_2(g) to metal electrode, M_(s)