Electrolysis - Jamb Chemistry Past Questions and Answers

Question 76:

• JAMB 2007

Which experiment led to the measurement of the charge on an electron?

A. Mass spectrometric experiment
B. Oil-drop experiment
C. Scattering α - particles
D. Discharge-tube experiment

Question 77:

• JAMB 2008

The experiment that showed that atoms have tiny positively charged nucleus was first carried out by

A. Moseley
B. Rutherford
C. Millikan
D. Dalton

Question 78:

• JAMB 2008

In recharging a lead-acid accumulator, the reaction at the cathode can be represented as

A. Pb²⁺_(aq) + SO^2-_4(aq) →PbSO_4(s)
B. Pb²⁺_(aq) + 2e^- →Pb_(s)
C. Pb²⁺_(aq) + 2H₂O_(l) → PbO_2(s) + 4H⁺_(aq) + 4e^-
D. Pb_(s) → Pb²⁺_(aq) + 2e^-

Question 79:

• JAMB 2008

If a given quantity of electricity liberates 0.65g of Zn²⁺, what amount of Hg²⁺ would be liberated by the same quantity of current?
[Zn = 65, Hg = 201]

A. 1.00g
B. 2.10g
C. 4.02g
D. 8.04g

Question 80:

• JAMB 2009

The acid used in electrolysis of water is dilute

A. HNO₃
B. CH₃COOH
C. H₂SO₄
D. HCl