Which of the following material fall in the category of a pure substance?
a) Ice b) wood
c) Calcium oxide
d) Mercury
e) air
f) Iron
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Ice, iron, hydrochloric acid, calcium oxide, mercury are pure substances as they have definite composition. Milk is a colloid and acts as a heterogeneous mixture; hence is not a pure substance. Brick and air are made up of more than one substance; hence they also don't fall into pure substances
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Answer:
- a. Ice
- c. Calcium oxide
- d. Mercury
- f. Iron
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