3.2 Electrolytic Cell 2023_2024

What happens at the positive electrode in a voltaic cell and in an electrolytic cell?

• A
• B
• C
• D

What are produced at positive/negative electrodes during electrolysis of molten NaCI?

• A
• B
• C
• D

What occurs during electrolysis of a molten salt?

• Electricity is produced by a spontaneous redox reaction
• Electricity cause a non-spontaneous redox reaction to occur
• Electrons flow through the molten salt
• Electrons are removed from both ions of the molten salt

A spoon is electroplated with copper using copper(II) sulfate. Which statement is correct?

• Positive electrode increases in mass

• Concentration of Cu²⁺ ions in solution decreases

• Reduction occurs at positive electrode

• Reaction at negative electrode is Cu²⁺ + 2e^– → Cu

Choose the correct statements regarding electrolytic cell.

i. Anode is connected to the battery positive terminal

ii. Cl^- ions lose electrons at anode

iii. Reduction occurs at cathode

iv. Alternating current is used

• i, ii and iii

• i, iii and iv

• ii, iii and iv

• i, ii, iii and iv

What kind of Electrical Current does electrolysis require?

• Direct

• Indirect

• Anternative

• Alternating

When concentrated NaCl solution is electrolysed what is formed at the anode?

[Standard reduction potential: Chlorine=+1.36 V; Water=+1.23V]

• Hydrogen

• Oxygen

• Chlorine

• Sodium

What is an electrolytic cell? 

• a cell that converts chemical energy into electrical energy 
• a cell that converts electrical energy into electrical energy 
• a cell that converts electrical energy into chemical energy 
• A cell that converts kinetic energy into potential energy. 

7. How do you test for Hydrogen gas?

• a) Lime water goes milky/cloudy

• b) Relights a glowing splint

• c) Lighted splint gives a pop sound.

• d) Bleaches damp indicator paper.

6. How do you test for Oxygen gas?

• a) Lime water goes milky/cloudy
• b) Relights a glowing splint
• c) Lighted splint gives a squeaky pop.
• d) Bleaches damp indicator paper.