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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) Me

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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.
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The following materials fall in the catergory of a pure substance.
(a) Ice
(c ) Iron
(d) Hydrochloric acid
(e ) Calcium oxide
(f ) Mercury
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