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CAIE A-Level Chemistry AS 6.1.4 And Use the Terms Oxidising Agent and Reducing Questions

Practise identifying and explaining oxidising agents and reducing agents using electron-transfer evidence in CAIE 9701 AS questions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Use the terms oxidising agent and reducing agent to describe electron transfer in redox reactions.

CAIE A-Level Chemistry AS 6.1.4 And Use the Terms Oxidising Agent and Reducing Questions question 1

[Maximum number: 1]

The vanadium salt, VOSO4\mathrm{VOSO}_{4}, is soluble in water and reacts readily with powdered manganese in dilute sulfuric acid.

The equation for the reaction is shown.

Mn( s)+2VOSO4(aq)+2H2SO4(aq)→V2(SO4)3(aq)+MnSO4(aq)+2H2O(l)\mathrm{Mn}(\mathrm{~s})+2 \mathrm{VOSO}_{4}(\mathrm{aq})+2 \mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{aq}) \rightarrow \mathrm{V}_{2}\left(\mathrm{SO}_{4}\right)_{3}(\mathrm{aq})+\mathrm{MnSO}_{4}(\mathrm{aq})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})

Which statement about this reaction is correct?

A

Hydrogen is oxidised in the reaction.

B

Manganese is the reducing agent in this reaction.

C

Sulfuric acid is the oxidising agent in this reaction.

D

The oxidation state of the vanadium changes from +5 to +3 .

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