A compound 'X' on heating with excess conc. Sulphuric acid at 443K gives an unsaturated compound 'Y'. 'X' also reacts with sodium metal to evolve a colourless gas 'Z'. Identify 'X', 'Y' and 'Z'. Write the equation of the chemical reaction of formation of 'Y' and also write the role of sulphuric acic in the reaction.

Explanation

To solve the problem, we need to identify the compounds 'X', 'Y', and 'Z', and write the relevant chemical equations along with the role of sulfuric acid in the reaction.

### Step-by-Step Solution:

1. **Identify Compound 'X':**
- The problem states that compound 'X' is heated with excess concentrated sulfuric acid at 443 K.
- Given that the reaction produces an unsaturated compound, 'X' is likely to be an alcohol. A common example of an alcohol is ethanol (C2H5OH).

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