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A mixture of nitrogen, oxygen and argon constitutes

  • A.three phases
  • B.as many phases as there are components
  • C.one phase
  • D.two phases

Answer: C

Gases mix in all proportions, so the mixture is homogeneous and there is no interface anywhere within it to separate mechanically. The number of components is three but the number of phases is one, and the two counts must never be confused.

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