Prabin Kalikote

We know, water breaks down into hydrogen andoxygen during its electrolysis. As two elementsdecompose themselves in this chemical reaction, it is called adecomposition reaction.

2H₂0 --------> 2H₂ + O₂

We know, a chemical reaction in which an acid and basereact together to give salt and water is called an acid-basereaction. Here acidic and basic nature et compounds areneutralized. So, it called a neutralization reaction.

The burning of magnesium in the air conducts that reactionwhere magnesium and oxygencombine to formmagnesium oxide. As two elements combine each other, it iscalled a combination reaction.

2Mg + O₂ ------> 2MgO

The amount of a substance that contains 6.023 X 10²³atoms or ions is called moles.

Avogadro's number is the number of particlesin one mole of a substance.

N_A =6.023 X 10²³

The atomic weight of an element expressed in grams iscalled gram atomic weight.

The molecular weight of a substance expressed ingrams is calledmolecular weight.

A chemical reaction in which aid and base reacttogether to gee salt and water is called an acid-basereaction.

It is called a neutralization reaction because the acidicand basic nature of compounds is neutralized duringthe reaction.

A chemical reaction in which an atom of a compoundis displaced by anotherelement is called a displacementreaction. Its types are:

1. Single displacement rxn.
2. Double displacement rxn.