Define a compound. Give two points of evidence to show that sodium chloride is a compound.
A compound is a substance made up of two or more elements chemically combined in a fixed proportion by weight.
Evidence to show that sodium chloride is a compound-
(i) Common salt, Sodium chloride is a compound made up of two elements, sodium and chlorine.
(ii) If a magnet is put in the sodium chloride compound, sodium does not get separated from chloride. A compound cannot be separated into components by physical methods.