Question detail

Chemical changes case 011 redox-boundary. A student explains a redox change. Which option uses the safest chemistry wording? Focus on the negative electrode the cathode in The process of electrolysis, not on a neighbouring Unit 4.4 reaction idea.

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Electrolysis

Question

A. Chemical changes case 011 redox-boundary: Links oxidation or reduction to the correct electron or oxygen change for the negative electrode the cathode
B. Chemical changes case 011 redox-boundary: Uses reduction and displacement as if they mean the same thing (The process of electrolysis)
C. Chemical changes case 011 redox-boundary: Calls the reaction redox without naming what changes (the negative electrode the cathode)
D. Chemical changes case 011 redox-boundary: Confuses oxidation state with ionic charge in the answer (Electrolysis)

Answer

The correct option is Chemical changes case 011 redox-boundary: Links oxidation or reduction to the correct electron or oxygen change for the negative electrode the cathode.

Explanation

The correct option is Chemical changes case 011 redox-boundary: Links oxidation or reduction to the correct electron or oxygen change for the negative electrode the cathode. It is correct because it directly supports the approved learning objective to identify the negative electrode as the cathode in The process of electrolysis. The other options are incorrect because they blur a Unit 4.4 concept boundary: acid versus alkali versus base, oxidation versus reduction, displacement versus reduction, electrolysis versus electroplating, anode versus cathode, positive versus negative ions, oxidation state versus ionic charge, or strong acid versus concentrated acid.

Common mistake

Confusing Electrode Names

Students often confuse the terms 'anode' and 'cathode', mistakenly identifying the negative electrode as the anode instead of the cathode.

Remember that the cathode is the negative electrode where reduction occurs, while the anode is the positive electrode where oxidation takes place.

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