An organic compound A contains `69.77%` carbon, `11.63%` hydrogen and the rest is oxygen. The molecular mass of the compounds is 86. It does not reduce Tollen's reagent but forms an addition product with sodium hydrogen sulphite and gives positive idoform test. On vigorous oxidation it gives ethanoic and propanoic acids. Write the possible structure of the compound A
(b) Write the chemical tests to distinguish between the following pairs of compounds :
(i) Acetophenone and Benzophenone
(ii) Ethanal and Propanal

Explanation

To solve the problem step by step, we will first determine the possible structure of the organic compound A based on the given information, and then we will address the second part regarding the chemical tests to distinguish between the specified pairs of compounds.

### Step 1: Determine the Empirical Formula of Compound A

1. **Given Percentages**:
- Carbon (C): 69.77%
- Hydrogen (H): 11.63%
- Oxygen (O): 100% - (69.77% + 11.63%) = 18.60%
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