Which of the following anions cannot be teste | vedclass

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(D) Dilute $H_2SO_4$ is used to test anions of weak acids such as $CO_3^{2-}$,$S^{2-}$,$SO_3^{2-}$,$NO_2^{-}$,and $CH_3COO^{-}$.These anions react wit

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(D) Dilute $H_2SO_4$ is used to test anions of weak acids such as $CO_3^{2-}$,$S^{2-}$,$SO_3^{2-}$,$NO_2^{-}$,and $CH_3COO^{-}$.These anions react with dilute $H_2SO_4$ to evolve gases.However,$F^{-}$,$Cl^{-}$,and $NO_3^{-}$ are anions of strong acids ($HF$,$HCl$,and $HNO_3$ respectively).Therefore,they do not react with dilute $H_2SO_4$ to evolve any gas and cannot be tested by this reagent.

Which of the following anions cannot be tested by dilute $H_2SO_4$?

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