ChemistryChapter 17: Halogenoalkanes
Uses and Environment (names)
Old solvents and refrigerants (CFCs) named as ozone history (air chapter).
Learning objectives
- Explain uses and environment (names) in simple chemical language.
- Connect 1. named with 2. harm slogans using equations, observations, or trends where needed.
- Answer a short Federal Board question with the correct terms and a clear reason.
Definition
Old solvents and refrigerants (CFCs) named as ozone history (air chapter). Modern haloalkanes still appear as named reagents in school. PVC monomer chloroethene named. Meaning: useful and also persistent / ozone / toxicity slogans. These notes do not teach how to make restricted refrigerants or solvents for abuse. CFCs, solvents, anaesthetics historically — Montreal Protocol for ozone link. Classify the halogen-bearing carbon as 1, 2, or 3 before choosing SN1, SN2, or elimination.
Important terms
- USES AND ENVIRONMENT (NAMES)
- Old solvents and refrigerants (CFCs) named as ozone history (air chapter).
- 1. NAMED
- PVC.
- 2. HARM SLOGANS
- Ozone.
Overview
Helpful names, then slogans:
Named
PVC. PTFE earlier. Anaesthetics history names if the book has them (history, not a dose). Fire-extinguisher old halons named as banned ozone story. DDT and persistent organohalogen harm named — environmental chemistry label.
Examples Chloroethene · CFC history · Not a recipe
Harm Slogans
Ozone. Persistence. Some toxic vapours — ventilation slogan, medical help if inhaled, not a treatment protocol. Recycle PVC slogan. Green chemistry pushes safer alternatives — slogan not synthesis route.
Examples Montreal named · Ventilation · No synthesis
WHAT — USES AND ENVIRONMENT (NAMES)
Old solvents and refrigerants (CFCs) named as ozone history (air chapter). Modern haloalkanes still appear as named reagents in school. PVC monomer chloroethene named. Meaning: useful and also persistent / ozone / toxicity slogans. These notes do not teach how to make restricted refrigerants or solvents for abuse. CFCs, solvents, anaesthetics historically — Montreal Protocol for ozone link. Classify the halogen-bearing carbon as 1, 2, or 3 before choosing SN1, SN2, or elimination.
WHY — Why this topic matters
USES AND ENVIRONMENT (NAMES) is an independent FBISE learning unit because students must use its definitions, conditions, equations, or trends separately in explanations and calculations.
HOW — How it works
NAMED: PVC. PTFE earlier. Anaesthetics history names if the book has them (history, not a dose). Fire-extinguisher old halons named as banned ozone story. DDT and persistent organohalogen harm named — environmental chemistry label. Examples: Chloroethene; CFC history; Not a recipe. HARM SLOGANS: Ozone. Persistence. Some toxic vapours — ventilation slogan, medical help if inhaled, not a treatment protocol. Recycle PVC slogan. Green chemistry pushes safer alternatives — slogan not synthesis route. Examples: Montreal named; Ventilation; No synthesis. Exam CFC link: old haloalkane refrigerants named CFCs harm stratospheric ozone (air chapter) banned uses, not a method to make them
In simple words
Names and slogans. No CFC manufacture, no solvents for harm.
Key points
- named uses + named harms
- not manufacture
- polymer names
- air chapter link
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Uses and Environment (names)
Sticky Notes · Quick Revision
Core Idea
- Old solvents and refrigerants (CFCs) named as ozone history (air chapter). Modern haloalkanes still appear as named reagents in school. PVC monomer chloroethene named. Meaning: useful and also persistent / ozone / toxicity slogans. These notes do not teach how to make restricted refrigerants or solvents for abuse. CFCs, solvents, anaesthetics historically — Montreal Protocol for ozone link. Classify the halogen-bearing carbon as 1, 2, or 3 before choosing SN1, SN2, or elimination.
1. NAMED
- PVC. PTFE earlier. Anaesthetics history names if the book has them (history, not a dose). Fire-extinguisher old halons named as banned ozone story. DDT and persistent organohalogen harm named — environmental chemistry label.
- Chloroethene
- CFC history
- Not a recipe
2. HARM SLOGANS
- Ozone. Persistence. Some toxic vapours — ventilation slogan, medical help if inhaled, not a treatment protocol. Recycle PVC slogan. Green chemistry pushes safer alternatives — slogan not synthesis route.
- Montreal named
- Ventilation
- No synthesis
Exam Example
- Exam CFC link:
- old haloalkane refrigerants named CFCs
- harm stratospheric ozone (air chapter)
- banned uses, not a method to make them
Common Misconceptions
- Do not confuse 1. NAMED with 2. HARM SLOGANS; state the difference before giving an example.
- Writing only “named uses + named harms” is not enough. Explain what it means in a complete sentence.
FBISE Exam Check
- Explain uses and environment (names), compare its two main parts, and include the correct chemical evidence.
- Names and slogans. No CFC manufacture, no solvents for harm.
60-second revision
- Old solvents and refrigerants (CFCs) named as ozone history (air chapter).
- 1. NAMED: PVC.
- 2. HARM SLOGANS: Ozone.
- Exam reminder: Exam CFC link: old haloalkane refrigerants named CFCs harm stratospheric ozone (air chapter) banned uses, not a method to make them
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