Question

explain oxidation, reduction, exothermic and endothermic.Types of chemical reaction with two examples each corrosion and rencidity​

Answer 1

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Oxidation:

when a element or compound gains oxygen or looses hydrogen or looses electrons

Reduction:

When a element or compound looses oxygen or gains hydrogen or gains electrons

Exothermic:

Reaction in which heat is given out

Endothermic:

Reaction in which heat is absorbed

Corrosion:

Eating away of metals due to exposure to air, moisture or carbon dioxide

Eg:

1)Fe+O2----->FeO+Fe2O3

2)Cu+O2----->CuO(black)

Rancidity:

Spoiling of fat and oil containing foods

1)spoiling of pickle

2)spoiling of chips

Answer 2

Answer:

Oxidation:-It is the gain of oxygen and lose of hydrogen

Reduction:-It is the gain of hydogen or loss of oxygen.

Exothermic Reaction:-This is a chemical reaction in which heat is given out.

Endothermic Reaction:-This is a Reaction in which heat is absorbed.

TYPES OF CHEMICAL REACTIONS

Combination reaction: It is a reaction in which two elements combine to form two or more different compounds.

Decomposition reaction: A single element decomposes to form to or more different compounds

Displacement reaction: A more reactive element displaces a less reactive element

Double displacement: Two atoms of different elements are exchanged..

Corrosion:- It is the process in which metals are slowly eaten up by the action of air moisture or chemicals. For example :- rusting is a form of corrosion in which iron is eaten up by the action of air and moisture.

Rancidity:-When the substance containing oils and fats are exposed to air they get oxidised and become rancid due to which their smell, taste and colour change.

For example:- Any food containing fats and oils placed for a long time become rancid or smell taste and colour changes

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