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CAIE A-Level Chemistry AS 9.2.2 The Variation in the Oxidation Number Questions

Practise determining and explaining maximum oxidation numbers of Period 3 elements in oxides, chlorides and fluorides using CAIE 9701 AS questions.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Explain the variation in oxidation number of Period 3 elements across their oxides, chlorides and fluorides.

CAIE A-Level Chemistry AS 9.2.2 The Variation in the Oxidation Number Questions question 1

[Maximum number: 1]

In reactions 1 and 2, X represents an element in Period 3.
In each reaction, X is forming a product where X is in its highest oxidation state.

reaction 1 chlorine + element X→XyClz\mathrm{X} \rightarrow \mathrm{X}_{\mathrm{y}} \mathrm{Cl}_{\mathrm{z}}

reaction 2 oxygen + element X→XpOqX \rightarrow X_{p} O_{q}

Which ratios show a steady increase from sodium to phosphorus?

A

neither z: y nor q: p

B

z: y only

C

q :p only

D

both z: y and q: p

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