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Is Matter Around Us Pure ? — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure ?1 Mark
MCQ
A mixture is a/ an :
  • A
    Pure substance
  • B
    Impure substance
  • C
    Refined substance
  • D
    None of the above
✓

Answer

  1. Impure substance

Explanation:

A pure substance has only one kind of atom or molecule and has a definite composition throughout.

A refined substance is a substance without any impurity.

But a mixture is neither pure nor a refined substance.

A mixture consists of different elements or compounds combined physically in an unknown ratio.

The constituents of a mixture are not combined chemically, and so the mixture still shows all the properties of its constituents.

A mixture doesn't have a definite boiling or freezing point.

All of these properties of a mixture make it an impure substance.

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