Page 1 - 1.MIND MAP-(CORROSION & RANCIDITY)

SAI International School
Class-X

Subject_ Chemistry
Topic-Chemical Reactions and Equations
Sub topic- Corrosion & Rancidity

Mind Map

Examples of OXIDATION-

CORROSION RANCIDITY
The wearing out of metals layer by layer, The oxidation of fats and Oil
due to their reaction with atmospheric present in food items to give
gases, in presence of moisture, is known out a foul smell and bitter
as Corrosion. taste is known as Rancidity.

➢ CORROSION-
Corrosion may be of two types:

1. Positive Corrosion 2. Negative Corrosion
This phenomenon protects the This phenomenon destroys the
metal from further corrosion metal gradually or makes the
Example- Corrosion of Al, Mg, Zn surface dull & lustre less.
Example- a. Rusting of Fe,
b. Tarnishing of Ag,
c. Corrosion of Cu.

➢ RANCIDITY-

What is Rancidity Methods for Prevention of Rancidity
a. Adding antioxidants.
b. Storing food in airtight containers.
Oxidation of Fats & Oil c. Refrigerating food items.
d. Flushing food packets with Nitrogen.

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