Answers

2016-02-10T14:06:03+05:30
ROCKS, METALs, MINERALS etc....
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2016-02-10T15:20:23+05:30
Air is not heterogeneous buddy..it is a homogeneous mixture as it is made up of different gases in oxygen,nitrogen,hydrogen,etc in definite proportion. Hope it helps and pls mark as the best answer. :-)
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