Choose the formula for the oxalate ion

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${CH}_{3} {COO}^{-}$

$C_{2} O_{4}^{- 4}$

$C_{2} O_{4}^{- 2}$

${CO}_{3}^{- 2}$

answer is C.

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Detailed Solution

The chemical formula of oxalate ion is $C_{2} O_{4}^{- 2}$ .It is derived from oxalic acid ${(COOH)}_{2} . 2 H_{2} O .$ Let us see the structure of oxalate ion as below.

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