An aliphatic hydrocarbon A on treatment with sulphuric acid in the presence of `HgSO_4` yields a liquid B with molecular formula `C_2H_4O`. Bon oxidation with acidified potassium dichromate yields C which gives effervescence with sodium bicarbonate. C when treated with `SOCl_2` gives D. When D reacts with ethanol it gives a sweet smelling liquid E. E is also formed when C reacts with ethanol in the presence of conc. `H_2SO_4`.
Draw the structure of the isomer of compound B.

Explanation

To solve the problem step by step, we will analyze the information given in the question and derive the structures of the compounds involved.

### Step-by-Step Solution:

1. **Identify Compound A**:
- Compound A is an aliphatic hydrocarbon that reacts with sulfuric acid in the presence of HgSO4.
- The reaction suggests that A is likely an alkene, which can undergo hydration to form an alcohol.
- A possible candidate for A is **propene (C3H6)**, which can be represented as CH3-CH=CH2.
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