Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following can act as a Lewis base? (1)\[NC{{l}_{3}}\] (2)\[PC{{l}_{3}}\] (3)\[NB{{r}_{3}}\] (4)\[SbC{{l}_{3}}\]A) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: D
Solution :
Trifluorides and trichlorides of P and Sb such as\[PC{{l}_{3}}\]and\[SbC{{l}_{3}}\]act as Lewis acid.\[NC{{l}_{3}}\]and \[NB{{r}_{3}}\]act as Lewis base (All trihalides of nitrogen except\[N{{F}_{3}}\]act as Lewis base).
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