Question

why Coke is used to reduce zinc oxide

Answer 1

because coke contains carbon dioxide that when reacted with zinc oxide reduces zinc oxide to zinc + carbon dioxide
hope it helps

Answer 2

Heya
Here is your answer
_____________________________________________________________

Coke is made by heating coal in absence of air

The reasons it is used to reduce Zinc Oxide are

1. It is cheap

2. As it has carbon in it.......it reacts to give carbon dioxide or carbon monooxide

ZnO + C ⇒ Zn + CO 

In case of Zinc CO i.e. carbon monoxide is formed

3. It requires low temperature than others i.e. 673 K
____________________________________________________________

Hope this helps! ^_^