A metal that exists as a liquid at room temperature is obtained by heating its sulphide in the presence of air. Identify the metal and its ore and give the reactions involved. 

Explanation

To solve the question, we need to identify the metal that exists as a liquid at room temperature, its ore, and the reactions involved in its extraction. Here’s a step-by-step solution:

### Step 1: Identify the Metal
The only metal that exists in a liquid state at room temperature is **Mercury (Hg)**.

**Hint:** Remember that most metals are solid at room temperature, but Mercury is an exception.

### Step 2: Identify the Ore
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