Give the reaction involved during extraction of zinc from its ore by
(a) roasting of zinc ore.`" "`(b) calcination of zinc ore. 

Explanation

To answer the question regarding the reactions involved during the extraction of zinc from its ore by roasting and calcination, we will break down the processes step by step.

### Step-by-Step Solution:

**(a) Roasting of Zinc Ore:**

1. **Identify the Ore:** The primary zinc ore that undergoes roasting is zinc blende, which is chemically represented as ZnS (zinc sulfide).

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