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CAIE A-Level Chemistry AS 6.1.5 Oxidation Numbers in Compound Names Questions

Practise using Roman numerals to indicate the magnitude of oxidation states in compounds and ions, with CAIE 9701 AS questions and mark schemes.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Use Roman numerals to indicate the magnitude of an oxidation state.

CAIE A-Level Chemistry AS 6.1.5 Oxidation Numbers in Compound Names Questions question 1

[Maximum number: 1]

The compound potassium bismuthate (V),KBiO3(\mathrm{V}), \mathrm{KBiO}_{3}, is a powerful oxidising agent.
What is the significance of the (V) in potassium bismuthate (V) ?

A

It is the oxidation number of the bismuth atom.

B

It is the charge of the bismuthate ion.

C

It is the oxidation number of the bismuthate ion.

D

It is the sum of the charges of the two ions present.

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