Chemistry

The reaction in which a more reactive element replaces less reactive elements to form a new compound is called substitution reaction.

The process of combining one or more water molecules with ionic compound while forming crystal lattice of ionic compound, it is called hydration reaction.

When heat is absorbed at the time of producing the products from reactants, the reaction is called endothermic reaction.

Crystals are composed of three-dimensional patterns. These patterns consist of atoms or groups of atoms in ordered and symmetrical arrangements which are repeated at regular intervals keeping the same orientation to one another.

The procedure of making soap and glycerin is called saponification.

The oxygen needed to decompose the organic matter in water in the presence of air is known as BOD.

(4-6)% liquid solution of ethanoic acid is called Vinegar.

The purest chemical substance is called an analar.