What are the contribution of jabber bin hayyan?

Contribution of JABBIR BIN HAYYAN..1) He give the concept of geological formation of metals.

2) Jabbir bin hayyan modified the Greek concept of element.

3) He improved the processes of Evaporation, Distillation, Sublimation, Crystallization and melting.

4) He refined the methods of preparing steel and extraction of metals from their ores.

5) He discover Nitric Acid and Sulphuric Acid.

6) He prepared concentrated acetic acid by the concentration of Vinegar

7) He prepare Aqua Regia to dissolve gold

8) He discover the method of preparing Varnish by using Manganese dioxide and apply it to protect iron from rusting.

9) He developed the process of golden script written with gold pyrite