The empirical formula of an organic acid is:

C H_{2} O

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C H_{2} O_{2}

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C_{2} H_{4} O_{2}

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C_{3} H_{6} O_{4}

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Solution

The correct option is D $C H_{2} O_{2}$
The empirical formula of an acid is ${C H}_{2} O_{2}$ .
Molecular formula $= n \times$ (Empirical formula)
$n =$ whole number multiple
$= 1, 2, 3, . . . . . .$
if $n = 1$ , $M . F = {C H}_{2} O_{2}$ , Formic acid ${H C O}_{2} H$
$n = 2$ , $M F = C_{2} H_{4} O_{4}$ , Acetic acid ${C H}_{3} {C O}_{2} H$

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