1
LEC#9 GROUP IVA ELEMENTS
47:09
2
LEC#11 SILICON DIOXIDE
37:45
4
LEC#3 PREPARATION OF BORAX
21:24
5
LEC#1 ELEMENTS OF IIIA GROUP
36:33
6
7
LEC#8 USES OF ALUMINIUM
35:07
8
LEC#15 SEMICONDUCTORS
34:31
LEC#14 SILICONES
33:14
10
11
LEC#6 BORIC ACID
33:01
12
LEC#2 PECULIAR BEHAVIOUR OF BORON
27:15
13
LEC#7 REACTIONS OF ALUMINIUM
29:27
15
16
LEC#5 BORAX
30:20

LEC#14 SILICONES