Question

explain roasting by giving an example of a reaction ?

Answer 1

Roasting is a cooking method that uses dry heat where hot air envelops the food, cooking it evenly on all sides with temperatures of at least 150 °C (~300 °F) from an open flame, oven, or other heat source.

Answer 2

Roasting is a process in which the sulphide ore is heated strongly in the presence of air to convert into metal oxide..

e. g.
When zinc sulphide ore is roasted it forms zinc oxide and sulphur dioxide