Last updated on Sep 20, 2026

Halogenoalkanes (AQA A-Level Chemistry): Flashcards

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Ozone Depletion

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Natural location of ozone

Stratosphere

What ozone absorbs

Harmful UV radiation from the Sun

Main chemical causing ozone depletion

CFCs (chlorofluorocarbons)

First step of ozone formation equation

$O_2 \xrightarrow{UV} 2O$

What CFCs release in stratosphere

Chlorine radicals ( $Cl•$ )

First ozone destruction equation by $Cl•$

$Cl• + O_3 \rightarrow ClO• + O_2$

Number of $O_3$ molecules one $Cl•$ can destroy

Thousands

1987 agreement to phase out CFCs

Montreal Protocol

Role of chlorine radicals in ozone depletion

Catalysts

Chlorine-free alternative to CFCs

HFCs (but are potent greenhouse gases)

Explore AQA A-Level Chemistry Revision Notes by Topics

Introduction to Organic Chemistry

Alkanes

Halogenoalkanes

Alkenes

Alcohols

Organic Analysis

Explore AQA A-Level Chemistry Model Answers by Topics

Introduction to Organic Chemistry

Alkanes

Halogenoalkanes

Alkenes

Alcohols

Organic Analysis

Explore AQA A-Level Chemistry Quizzes by Topics

Introduction to Organic Chemistry

Alkanes

Halogenoalkanes

Alkenes

Alcohols

Organic Analysis

Explore AQA A-Level Chemistry Exam Questions by Topics

Introduction to Organic Chemistry

Alkanes

Halogenoalkanes

Alkenes

Alcohols

Organic Analysis

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