A) \[N{{F}_{3}}\]
B) \[NC{{l}_{3}}\]
C) \[NB{{r}_{3}}\]
D) \[N{{H}_{3}}\]
Correct Answer: A
Solution :
Nitrogen form trihalides of the formula \[\text{N}{{\text{X}}_{\text{3}}}\text{.}\]Among halides of nitrogen, \[\text{N}{{\text{F}}_{3}}\]is extremely stable due to strong N-F bond in \[\text{N}{{\text{F}}_{3}}.\]Small size .of both nitrogen and fluorine atom causes strongness of \[\text{N}-\text{F}\]bond. \[\text{NC}{{\text{l}}_{\text{3}}}\]is explosive yellow oil. \[\text{NB}{{\text{r}}_{\text{3}}}\]and\[\text{N}{{\text{I}}_{3}}\]are unstable compound and known only as ammonia complex e. q.,\[NB{{r}_{3}}.6N{{H}_{3}}.\]
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