Pure Substances vs Mixtures Quiz

Froggy Jumps

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Pure vs mixed materials

charlie Mahoney

Australia

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Pure Substances vs Mixtures Quiz


Froggy Jumps Pure Substances vs Mixtures QuizVersion en ligne Pure vs mixed materials par charlie Mahoney 1 What defines a pure substance? a A mixture of substances b Variable composition c Fixed composition 2 Which is a pure substance? a Saltwater solution b Air c Water (H2O) 3 Can pure substances be separated into simpler substances by physical methods? a Yes, by distillation b No, only chemical changes c Yes, by filtration 4 What is a compound? a A mixture of elements b A pure substance of two or more elements bonded c A pure element 5 Do mixtures have variable composition? a No b Yes c Only in solutions 6 Which of the following is a mixture? a Oxygen gas b Saltwater c Water (H2O) 7 What is a solution? a A homogeneous mixture b A pure substance c A heterogeneous mixture 8 Is air a pure substance? a Sometimes yes, sometimes no b No c Yes 9 Which statement is true about pure substances? a They always mix with other substances b They have constant composition and can be elements or compounds c They cannot be chemically bonded 10 Which method can separate a mixture but not a pure substance? a Chemical reactions b Nuclear separation c Physical methods (filtration, distillation)