Which one of the following compounds can be deprotonated by OH fastest

1.	Which one of the following compounds can be deprotonated by OH fastest ?
Answer» `HCOOH, pK_(a)=3.8` `H_(2)S, pK_(a)=7.0` Toluence , `pK_(a)` =41 `CH_(3)NH_(2), pK_(a)=40` Answer :A

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