Which of the following is NOT a property associated with compounds?
The constituents can be separated fairly easily by physical methods.
A compound is a pure substance formed when elements chemically combine in a fixed ratio. Key properties: (1) fixed composition, (2) properties totally different from constituent elements, (3) elements react to form the compound.
The one property that does NOT apply to compounds is that 'constituents can be separated fairly easily by physical methods.' In a compound, the elements are chemically bonded and can only be separated by chemical reactions, not by physical methods like distillation, filtration, or evaporation. (That property describes mixtures.)
The correct answer is : The constituents can be separated fairly easily by physical methods.
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