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

The total number of dative bonds present in all the following $CO$,$NH_4Cl$,$Al_2Cl_6$,$Al(H_2O)_6^{3+}$,$HNO_3$,and $CO_2$ is

$A$ simple example of a coordinate covalent bond is exhibited by

Sulfuric acid $(H_2SO_4)$ provides an example of ........

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 ..........

What is the nature of the bond between $B$ and $O$ in $(C_2H_5)_2OBH_3$?