Effects Of Oxidation Reaction
Chapter Name : Chemical Reactions And Equations |
Sub Topic Code : 102_10_01_03_02 |
Topic Name : Effects Of Oxidation Reaction |
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Sub Topic Name : Rancidity |
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Introduction
Rancidity is the chemical decomposition of oils and fats. It occurs when oils and fats are kept exposed to air for a long time. It causes undesirable odor and taste, lowering of nutritional value, free-radical formation and vulnerability to heart disease. To avoid, keep the food away from light in closed, air-tight container.
Pre-Requisites:
Reaction, reactants, products
Activity:
Keeping certain foods such as cheese, oil, fish, meat etc. exposed to air for a long time at room temperature makes them go rancid.
Real Life Question:
Why are some foods kept in air tight containers?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Chemical change | When two or more substances react to form new substances. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Chips / cheese/ oils go stale when exposed to air | When a pack of chips is kept exposed to air the oil get oxidized causing rancidity. |
Real life uses :
To avoid Rancidity food is kept in sealed air tight plastic or containers.
Places to visit :
Kitchen.
Practical examples around us
| Examples | Explainations |
|---|---|
| Meat and chips/ cheese are covered in plastic or sealed | Food stuffs are sealed to avoid the exposure to air or moisture. |
What you learn in Theory:
Rancidity is the chemical decomposition of oils and fats. It occurs when oils and fats are kept exposed to air for a long time. It causes undesirable odor and taste, lowering of nutritional value, free-radical formation and vulnerability to heart disease. To avoid, keep the food away from light in closed, air-tight container.
What you learn in Practice:
Rancidity spoils food.