Dative bond is present in

Total number of coordinate bonds present in $1$ molecule of $(NH_4)_3PO_4$ are:

In the reaction $SnCl_2 + 2Cl^{-} \rightarrow [SnCl_4]^{2-}$,which species acts as a Lewis acid?

In $BF_3$,the $B-F$ bond length is $1.3 \ \mathring{A}$. When $BF_3$ reacts with $Me_3N$,it forms an adduct $Me_3N \to BF_3$. In this adduct,the $B-F$ bond length will be ..........

Which of the following compounds has a coordinate (dative) bond?

Which of the following is the correct representation of the reaction when $BF_3$ reacts with ammonia?
$(i)$ $F_3B + :NH_3 \rightarrow [F_3B \leftarrow :NH_3]$
(ii) $F_3B + :NH_3$ $\rightarrow [F_3B$ $\rightarrow :NH_3]$