Which of the following is correct O A mixture is homogeneous and a pure substance is heterogeneous O A mixture has a fixed

Question

Which of the following is correct O A mixture is homogeneous and a pure substance is heterogeneous O A mixture has a fixed boiling and melting points whereas pure substance varies O The density of a mixture and a pure substance changes with pressure O The composition of a mixture can vary but the composition of a pure substance is always the same

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