A) \[{{H}_{2}}O\]
B) \[{{H}_{2}}S\]
C) \[N{{H}_{3}}\]
D) \[P{{H}_{3}}\]
Correct Answer: C
Solution :
Proton affinity it means affinity for proton\[ie,\]basicity \[N{{H}_{3}}-\]nitrogen has pair of electron to donate as well as higher tendency to donate due to lower electronegativity. \[P\] is not suitable as that has larger size.
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