2018 · Q29
Which one of the following is not a characteristic of a compound?
General KnowledgeChemistry
- AComposition is variable.
- BAll particles of compound are of only one type.
- CParticles of compound have two or more elements.
- DIts constituents cannot be separated by simple physical methods.
Explanation
A compound has a fixed, definite composition by mass — that is the law of definite proportions. Variable composition is the hallmark of mixtures, not compounds. Having particles of only one type, containing two or more elements and resisting separation by physical methods are all true characteristics of compounds. Hence variable composition is not a characteristic of a compound.