Which of the following cannot act as a Bronst | vedclass

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(C) $Bronsted$ base is defined as a substance that can accept a proton $(H^+)$. $HCO_3^-$ can accept a proton to form $H_2CO_3$. $PH_3$ has a lone pai

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$BF_3$

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(C) $Bronsted$ base is defined as a substance that can accept a proton $(H^+)$. $HCO_3^-$ can accept a proton to form $H_2CO_3$. $PH_3$ has a lone pair on the $P$ atom and can accept a proton. $H_2O$ can accept a proton to form $H_3O^+$. $BF_3$ is an electron-deficient molecule with an incomplete octet (only $6$ electrons around $B$). It acts as a $Lewis$ acid by accepting an electron pair,not as a $Bronsted$ base.

Which of the following cannot act as a Bronsted base?

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