CnH2nO is the general formula of:
Correct answer: C. Option C: Ketones
- A. Option A: Ether
- B. Option B: Carboxylic acid
- C. Option C: Ketones
- D. Option D: Carbolic acid
Explanation
The correct answer is ketones, which have the general formula R2C=O. In this case, 'Rn' represents hydrocarbon groups that can vary in size but always adhere to the formula CnH2nO. In contrast, ethers and carboxylic acids do not match the formula due to their distinct structures and functional groups. Ethers (R-O-R') have a different connectivity, and carboxylic acids (RCOOH) incorporate both a carbonyl and a hydroxyl group, leading to a different ratio of hydrogens. Carbolic acid, or phenol, contains a hydroxyl group bonded to a benzene ring (C6H5OH), which deviates from the given formula.
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Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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