Question detail

Chemical changes case 038 reactivity-evidence. A student uses the reactivity series to justify an observation. Which option is best? Focus on that unreactive metals such gold are found the in Extraction of metals and reduction, 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 038 reactivity-evidence: Uses the relative reactivity order to predict the change for that unreactive metals such gold are found the
B. Chemical changes case 038 reactivity-evidence: Chooses the product by memorising a colour instead of the series (Extraction of metals and reduction)
C. Chemical changes case 038 reactivity-evidence: Says any metal can displace any other metal ion (that unreactive metals such gold are found the)
D. Chemical changes case 038 reactivity-evidence: Ignores whether the reacting substance is more or less reactive (Reactivity of metals)

Answer

The correct option is Chemical changes case 038 reactivity-evidence: Uses the relative reactivity order to predict the change for that unreactive metals such gold are found the.

Explanation

The correct option is Chemical changes case 038 reactivity-evidence: Uses the relative reactivity order to predict the change for that unreactive metals such gold are found the. It is correct because it directly supports the approved learning objective to explain that unreactive metals such as gold are found in the Earth as the metal itself in Extraction of metals and reduction. 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

Misunderstanding Gold's Occurrence

Students often think that all metals are found in the Earth as pure metals, not just unreactive ones like gold.

Emphasize that only unreactive metals, such as gold, can be found in their elemental form, while most metals are found as compounds.

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For Extraction of metals and reduction, which acid-base focus answer best supports this Unit 4.4 objective: Explain that unreactive metals such as gold are found in the Earth as the metal itself?