Solid $CuSO_4 \cdot 5H_2O$ has covalent,ionic,as well as coordinate bonds. The copper atom/ion forms $.........$ coordinate bonds with water molecules.

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 ..........

Why does $NH_3$ act as a Lewis base?

Which of the following species does not contain a coordinate covalent bond?

In Lewis acid-base theory,neutralization reaction may be considered as

Which of the following is the product of the reaction between $AlCl_3$ and $CH_3OCH_3$?