CORROSION AND RANCIDITY
Channel: SCHOLAR PATHSHALA
Date: 19/03/2021

Hello!
TOPIC: CORROSION AND RANCIDITY of NCERT Class X Science.
It proceeds like this,

Corrosion is the process in which metals are eaten up gradually by the action of air, moisture or a chemical on their surface. It is caused mainly by the oxidation of metals by the oxygen of air. Rusting of iron metal is the most common form of corrosion. The black coating on silver and the green coating on copper are other examples of corrosion. Corrosion causes damage to car bodies, bridges, iron railings, ships and to all objects made of metals, specially those of iron.
Conditions Necessary for the Rusting of Iron:
 1..Presence of air (or oxygen) 
2. Presence of water (or moisture)

Prevention of Rusting:
1. Rusting of iron can be prevented by painting.
2. Rusting of iron can be prevented by applying grease or oil.
3. Rusting of iron can be prevented by galvanisation. 
4. Rusting of iron can be prevented by tin-plating and chromium-plating.
5. Rusting of iron can be prevented by alloying it to make stainless steel.

Oxidation also has damaging effect on foods containing fats and oils. When the food materials prepared in fats and oils are kept for a long time, they start giving unpleasant smell and taste. The fat and oil containing food materials which give unpleasant smell and taste are said to have become rancid.
The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called rancidity.

The development of rancidity of food can be prevented or retarded in the following ways : 
1. Rancidity can be prevented by adding anti-oxidants to foods containing fats and oils.
2. Rancidity can be prevented by packaging fat and oil containing foods in nitrogen gas.
3. Rancidity can be retarded by keeping food in a refrigerator.
4. Rancidity can be retarded by storing food in air-tight containers.
5. Rancidity can be retarded by storing foods away from light.

Stay connected with SCHOLAR PATHSHALA and Subscribe  our channel to see science experiments and have fun with science.

Also, share this vedio among your friends so that you all can enjoy it.

Don't forget to suggest our channel to someone who needs it.

Thank You for watching
Team "SCHOLAR PATHSHALA".
- SCHOLAR PATHSHALA:-
https://www.youtube.com/channel/UCleHdIOloLOx02fNuD7vx0Q

- Burning of Magnesium ribbon with white dazzling light:-
https://youtu.be/wWMcP2zms5k

- Demonstration of formation of Hydrogen gas by the action of dilute Hydrochloric acid on Zinc:-
https://youtu.be/ou2phEVmqHc

- Electrolysis of water:- 
https://youtu.be/TY26QGoR58I 

- Immunity Booster Drink:- 
https://youtu.be/JcHV2TTxCcE 

- Displacement reaction between iron nail and copper sulphate solution:- https://youtu.be/6tsGfs5a9ds 

- Acid, base indicators:- 
https://youtu.be/z9nyi8Y9Ayc

- Conductivity:- 
https://youtu.be/mAB9nrppAVQ

-Soya Protein Platter:-
https://youtu.be/Q1h2xEVSP3Y

- ANSH BAKES MANGO CAKE:-
https://youtu.be/7A2nNltjcqQ

- SALTS:-
https://youtu.be/5sFDeICu3tY

- Reaction of Lead Nitrate solution with Potassium Iodide solution:-
https://youtu.be/v4haOfwz1dA

- Changes during Chemical reactions:- 
https://youtu.be/HplJ4swuZC0