Identify the non-metals from the following substances.
When Iron is alloyed with a non-metal, a hard substance called steel is formed. Identify the non-metal which is used here.
Identify X in the following reaction X+ Acid → Salt + Water.
Categorize the following substances as Metals and Non-metals: Graphite, Zinc, Diamond, Oxygen, Sodium, Aluminium, Silver, Carbon, Mercury, Phosphorous [5 MARKS]