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Which of the following materials fall in the category of a “pure substance”? (a) Ice

Q 7.     Which of the following materials fall in the category of a “pure substance”?

           (a) Ice

           (b) Milk

           (c) Iron

           (d) Hydrochloric acid

           (e) Calcium oxide

           (f) Mercury

           (g) Brick

           (h) Wood

            (i) Air

Answers (1)
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A pure substance is a matter which consists of a single type of particles and has specific properties- 
Therefore, the following given substances are ''pure substance" -

  • Ice
  • Iron
  • Hydrochloric acid
  • calcium oxide and
  • mercury
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