Chemistry

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.

If a solid directly converts to gas on heating and the gas directly converts to solid on cooling, this phenomenon is called sublimation.

The volume of one mole of a substance is called the molar volume.