Question detail

Chemical changes case 084 acid-base-boundary. A student sorts acid, alkali and base statements. Which option keeps the terms distinct? Focus on Link electron loss gain changes between atoms and in Oxidation and reduction in terms of electrons (HT only), 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

Reactivity of metals

Question

A. Chemical changes case 084 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for Link electron loss gain changes between atoms and
B. Chemical changes case 084 acid-base-boundary: Treats every base as an alkali without checking solubility (Oxidation and reduction in terms of electrons (HT only))
C. Chemical changes case 084 acid-base-boundary: Uses pH wording but does not identify the acid-base role (Link electron loss gain changes between atoms and)
D. Chemical changes case 084 acid-base-boundary: Names a salt product without explaining the reaction context (Reactivity of metals)

Answer

The correct option is Chemical changes case 084 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for Link electron loss gain changes between atoms and.

Explanation

The correct option is Chemical changes case 084 acid-base-boundary: Keeps the acid-base distinction tied to the named substance for Link electron loss gain changes between atoms and. It is correct because it directly supports the approved learning objective to (HT only) Link electron loss or gain to changes between atoms and ions in Oxidation and reduction in terms of electrons (HT only). 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 Electron Loss and Gain

Students often confuse electron loss with oxidation and gain with reduction, failing to link these changes to the corresponding changes in atoms and ions.

To fix this, students should practice identifying oxidation and reduction in various reactions, focusing on how the loss or gain of electrons affects the charge and identity of the atoms and ions involved.

Related flashcards

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For Oxidation and reduction in terms of electrons (HT only), which electrolysis focus answer best supports this Unit 4.4 objective: (HT only) Link electron loss or gain to changes between atoms and ions?