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Question:
Which of the following things are pure substances?
(a) Ice, (b) Milk, (C) Iron, (d) Hydrochloric Acid, (e) Calcium oxide, (f) Mercury, (g) Brick, (h) Wood, (i) Air.
Answer:
(a) Ice, (c) Iron, (d) Hydrochloric acid, (e) Calcium oxide, (f) Mercury are pure substances
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