Which of the following substances has the hig | vedclass

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(C) The proton affinity depends on the availability of the lone pair of electrons on the central atom. $NH_3$ has a lone pair on the nitrogen atom whi

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$NH_3$

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(C) The proton affinity depends on the availability of the lone pair of electrons on the central atom. $NH_3$ has a lone pair on the nitrogen atom which is more available for donation compared to the lone pairs on $H_2O$,$H_2S$,or $PH_3$. Due to the smaller size of nitrogen and higher electron density,$NH_3$ acts as a stronger Lewis base. Therefore,the reaction is: $NH_3 + H^+ 	o NH_4^+$.

Which of the following substances has the highest proton affinity?

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