Which of the following compounds has the empirical formula CH20 and reacts with sodium hydroxide?
Correct answer: C. acetic acid
- A. carbonic acid
- B. ethanol
- C. acetic acid
- D. methanoic acid
Explanation
Empirical formula: All the options share the same empirical formula, CH₂O. This means they have the same ratio of atoms (1 carbon, 2 hydrogens, and 1 oxygen) but not necessarily the same molecular formula.Reaction with NaOH: Acetic acid (CH₃COOH) readily reacts with NaOH in a neutralization reaction. The acidic proton (H⁺) from the carboxylic acid group (COOH) gets transferred to the hydroxide ion (OH⁻) from NaOH, forming water and the sodium acetate salt (CH₃COONa).
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Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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