Polyhalogen Compounds
Chapter Name : Haloalkanes And Haloarenes |
Sub Topic Code : 102_12_10_07_02 |
Topic Name : Polyhalogen Compounds |
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Sub Topic Name : Trichloromethane |
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Introduction
1.Chemically, chloroform is employed as a solvent for fats, alkaloids, iodine and other substances. 2.The major use of chloroform today is in the production of the Freon refrigerant R-22. 3. It was once used as a general anesthetic in surgery but has been replaced by less toxic, safer anesthetics, such as ether. 4.As might be expected from its use as an anesthetic, inhaling chloroform vapors depresses the central nervous system. 5.Breathing about 900 parts of chloroform per million parts of air (900 parts per million) for a short time can cause dizziness, fatigue, and headache. 6.Chronic chloroform exposure may cause damage to the liver (where chloroform is metabolized to phosgene) and to the kidneys 7.Some people develop sores when the skin is immersed in chloroform. 8.Chloroform is slowly oxidized by air in the presence of light to an extremely poisonous gas, carbonyl chloride, also known as phosgene. 9.It is therefore stored in closed dark colored bottles completely filled so that air is kept out.
Pre-Requisites:
Elements, compounds
Activity:
The major use of chloroform today is in the production of the Freon refrigerant R-22.
Real Life Question:
What is the use of chloroform?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Polyhalogen compounds | Carbon compounds containing more than one halogen atom are called poly halogen compounds. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| The major use of chloroform today is in the production of the Freon refrigerant R-22. |
Real life uses :
The major use of chloroform today is in the production of the Freon refrigerant R-22.
Places to visit :
pharmacy
Practical examples around us
| Examples | Explainations |
|---|---|
| Freon R-22 | The major use of chloroform today is in the production of the Freon refrigerant R-22. |
What you learn in Theory:
1.Chemically, chloroform is employed as a solvent for fats, alkaloids, iodine and other substances. 2.The major use of chloroform today is in the production of the Freon refrigerant R-22. 3. It was once used as a general anesthetic in surgery but has been replaced by less toxic, safer anesthetics, such as ether. 4.As might be expected from its use as an anesthetic, inhaling chloroform vapors depresses the central nervous system. 5.Breathing about 900 parts of chloroform per million parts of air (900 parts per million) for a short time can cause dizziness, fatigue, and headache. 6.Chronic chloroform exposure may cause damage to the liver (where chloroform is metabolized to phosgene) and to the kidneys 7.Some people develop sores when the skin is immersed in chloroform. 8.Chloroform is slowly oxidized by air in the presence of light to an extremely poisonous gas, carbonyl chloride, also known as phosgene. 9.It is therefore stored in closed dark colored bottles completely filled so that air is kept out.
What you learn in Practice:
Polyhalogen compounds have a variety of uses