The general formula $C_{n} H_{2 n} O_{2}$ could be for open chain:

diketones

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carboxylic acids

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diols

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dialdehydes

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Solution

The correct option is D carboxylic acids
The general formula $C_{n} H_{2 n} O_{2}$ could be for open chain carboxylic acids. Thus, butanoic acid $C H_{3} - C H_{2} - C H_{2} - C O O H$ has formula $C_{4} H_{8} O_{2}$ . And, decanoic acid $C H_{3} - (C H_{2})_{8} - C O O H$ has formula $C_{10} H_{20} O_{2}$

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C_{n} H_{2 n} O_{2}

What are carboxylic acids? Give their general formula.

\begin{matrix} H | H_{2} N & - & C & - & C O O H | R \end{matrix}

R

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