Chemical reactions in which reactants gain hydrogen is called

When a more reactive element removes another element from its compound, these reactions are called

When two or more substances combine to form single product , then the reaction is called

Storage of food in airtight containers prevents?

The slow process of decay of metal due to the effect of air, acids and  moisture on it called

The chemical reaction in which H₂ is less is called?

What is the chemical formula of rust?

Plaster of Paris when mixed with water set quickly into hard is known as?

CaCO₃₍₃₎ → CaO_(g) + CO_2(g) . This is an example of?

A pinkish brown coating formed when black copper oxide is reacted with hydrogen is due to