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Chemistry UTME / JAMB 2022 Electrochemistry & Electrolysis
On the basis of the electrochemical series, which of these ions will show the greater tendency to be discharged at the cathode in an electrolytic cell
A cu\(^{2+}\)
B sn\(^{2+}\)
C fe\(^{2+}\)
D zn\(^{2+}\)
medium Difficulty
Study Explanation
Chemistry UTME / JAMB 2022 Electrochemistry & Electrolysis
In order to electroplate spoon with silver, the arrangement of the electrolytic cell is?
A the anode is a silver rod and the cathode is the spoon
B the anode is the spoon and the cathode is a silver rod
C the electrolyte is silver trioxonitrate(v)( solution and the cathode is a silver rod.
D the electrolyte is silver trioxonitrate(v) solution and the anode is the spoon
medium Difficulty
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Chemistry UTME / JAMB 2021 Electrochemistry & Electrolysis
The metal used to recover copper from a solution of copper sulphate is?
A Na
B Ag
C Hg
D Fe
medium Difficulty
Study Explanation
Chemistry WAEC / WASSCE 2019 Electrochemistry & Electrolysis
If the oxidation potential of Mg and Al are +2.37 volts and + 1.66 volts respectively, then the Mg would?
A not replace Al
B be replaced by Al
C remain in the solution
D replace Al
medium Difficulty
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Chemistry UTME / JAMB 2010 Electrochemistry & Electrolysis
Iron can be protected from corrosion by coating the surface with?
A gold
B silver
C copper
D zinc
medium Difficulty
Study Explanation
Chemistry UTME / JAMB 2010 Electrochemistry & Electrolysis
What quantity of aluminum is deposited when a current of 10A is passed through a solution of an aluminum salt for 1930s? [Al = 27, F = 96500 C mol -1]
A 0.2 g
B 1.8 g
C 5.4 g
D 14.2 g
medium Difficulty
Study Explanation
Chemistry UTME / JAMB 2009 Electrochemistry & Electrolysis
The acid used in electrolysis of water is dilute?
A HNO3
B CH3COOH
C H2SO4
D HCl
medium Difficulty
Study Explanation
Chemistry UTME / JAMB 2009 Electrochemistry & Electrolysis
Which of the following metals is purified commercially by electrolysis?
A Zn
B Fe
C Sn
D Cu
medium Difficulty
Study Explanation
Chemistry UTME / JAMB 2006 Electrochemistry & Electrolysis
The solution that will conduct the highest amount of electricity is?
A 0.5 mol dm-3 of hydrochloric acid
B 2.0 mol dm-3 of hydrochloric acid
C 0.5 mol dm-3 ethanoic acid
D 2.0 mol dm-3 ethanoic acid
medium Difficulty
Study Explanation
Chemistry UTME / JAMB 2006 Electrochemistry & Electrolysis
In the electrolysis of CuSO\(_4\)(g) using platinum electrodes, the reaction at the anode is
A 4H+ + 4e- → 2H2
B 4OH- + 4e- → 2H2O + O2
C 2OH - 2e- → 2OH
D 2OH- + 2OH- → 2H2O + O2
medium Difficulty
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Chemistry UTME / JAMB 2002 Electrochemistry & Electrolysis
What amount of mercury would be liberated if the same quantity of electricity that liberates 0.65g of zinc is applied?
A 2.01g
B 1.00g
C 4.02g
D 8.04g
medium Difficulty
Study Explanation
Chemistry WAEC / WASSCE 2002 Electrochemistry & Electrolysis
When concentrated sodium chloride solution is electrolysed using inert electrodes the products are?
A oxygen and hydrogen
B hydrogen and oxygen
C sodium and oxygen
D soduim hydroxide, hydrogen and chlorine
medium Difficulty
Study Explanation
Chemistry UTME / JAMB 1998 Electrochemistry & Electrolysis
The oxide that remains unchanged when heated in hydrogen is?
A CuO
B Fe2O3
C PbO2
D ZnO
medium Difficulty
Study Explanation
Chemistry WAEC / WASSCE 1998 Electrochemistry & Electrolysis
How many electrons are removed from Cr2- when it is oxidized to CrO42-?
A o
B 2
C 4
D 8
E 10
medium Difficulty
Study Explanation
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