MCQ
Which one of the following statements is incorrect:
  • A
    All elements are homogeneous
  • B
    Compounds made up of a number of elements are homogeneous
  • C
    A mixture is not always heterogeneous
  • D
    Air is a heterogeneous mixture

Answer

  1. Air is a heterogeneous mixture

Explanation:

All elements and compounds are homogeneous, as they are pure substances.

A mixture can be homogeneous or heterogeneous.

So, options A, B and C are correct statements.

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