SSC MTS EXAM

Detailed explanation-1: -A pure substance is a material that has a constant composition and has consistent properties throughout the sample. Since it is made up of one type of particle, it is called a pure substance.

Detailed explanation-2: -A pure substance is a form of matter that has a constant composition (meaning that it is the same everywhere) and properties that are constant throughout the sample (meaning that there is only one set of properties such as melting point, color, boiling point, etc. throughout the matter).

Detailed explanation-3: -Chemical composition refers to the arrangement, type, and ratio of atoms in molecules of chemical substances. Chemical composition varies when chemicals are added or subtracted from a substance, when the ratio of substances changes, or when other chemical changes occur in chemicals.