A Lecture 1.ppsx93.8 MB B Lecture 2.ppsx102.8 MB C Lecture 3.ppsx115.1 MB D Lecture 4-1.ppsx70.5 MB D Lecture 4-2.ppsx59.9 MB D Lecture 4-3.ppsx52.5 MB E Lecture 5 Copper & ....ppsx101.6 MB F Lecture 6 Gold, part-1.ppsx51.8 MB F Lecture 6 Gold, part-2.ppsx84.6 MB G Lecture 8, Aluminium.ppsx81.9 MB