MCQ
(Consider all steps and intermediate) correct statement is


- ANucleophilic addition
- BNucleophilic substitution reaction
- CProduct obtained is chiral
- ✓All


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$(I)$ coloured ions in aqueous solution
$(II)$ oxides of nitrogen are formed on reaction with concentrated $HNO_3$
$(III)$ chlorides of formula $MCl_2$ and $MCl_3$
Assertion $(A)$ : Boron is unable to form $BF _{6}^{3-}$
Reason $(R)$ : Size of $B$ is very small.
In the light of the above statements, choose the correct answer from the options given below.
