Electrolysis - Jamb Chemistry Past Questions and Answers

Question 91:

• JAMB 2014

In the electrolytic extraction of cacium from calcium chloride, the cathode is

A. Zinc
B. Graphite
C. Platinum
D. Iron

Question 92:

• JAMB 2015

The acid in electrolysis of water is dilute

A. HNO₃
B. CH₃COOH
C. H₂SO[sub][/sub]
D. HCl

Question 93:

• JAMB 2015

Flow of current in electrolytes is due to the movement of

A. Electrons
B. Holes and electron
C. Ions
D. Charges

Question 94:

• JAMB 2015

Which of the following ions requires the largest quantity of electricity for discharge at an electrode?

A. 2.0 mole of Q3⁺
B. 2.5 mole of R2⁺
C. 3.0 mole of T^-
D. 4.0 mole of Y^-

Question 95:

• JAMB 2015

In the electrolysis of CuSo_4(g) using platinum electrode the reaction at the anode is

A. 4H+ 4e - 2H₂
B. 4OH^-- 4e = 2H₂O + O₂
C. 2OH - 2e_- = 2OH
D. 2OH^- + 2OH = 2H₂O + O₂