Force and Laws of Motion (Chapter 9) of NCERT Class 9 Science Book is available here in PDF format. We have provided the latest edition of NCERT Class 9 Science Chapter 9 for the current academic ...
Explanation: A pure substance is one which is made up of only one kind of atoms or molecules. They have the same composition throughout. 2.Rusting of an article made up of iron is called (a) corrosion ...
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