Science Bank 11 (Industrial Chemistry): you just need part 3 – Sulphur & Sulphuric Acid, from 10m 20s:
Great resources from the Australian International School – videos, powerpoints, worksheets, practicals, animations, flashcards etc.
And here’s a powerpoint on the Contact Process which also covers the Haber process and alloys:
Complete Chemistry for Cambridge IGCSE, chapter 16, pp.232 – 233
Here are some key terms for this topic: Key Terms C12 & C13