Question

Column-I contains four entries and Column-II contains four entries. Entries of Column-I are to be matched with some entries of Column-II. One or more than one entries of Column-I may have matching with the same entries of Column-II.

Answer 1

(A) A molecule of solid ammonium chloride $N{H}_{4}Cl\left(s\right)$ contains coordinate bond between $N$ and $H$ atoms, ionic bond between ammonium ion and chloride ions and covalent bond between $N$ and $H$ atoms.
(B) Copper sulphate pentahydrate $CuS{O}_4.5H_{2}O\left(s\right)$ forms intermolecular hydrogen bonds due to presence of water of crystallisation. It contains coordinate bond, ionic bond between cupric ions and sulphate ions and covalent bond between $O$ and $H$ atoms of water molecule.
(C) $B(OH{)}_3$ forms inter molecular hydrogen bonds as $H$ is attached to electronegative $O$ atom. It contains covalent bonds.
(D) Hydrogen peroxide $H_2{O}_2\left(l\right)$ forms inter molecular hydrogen bonds as $H$ is attached to electronegative $O$ atom. It contains covalent bonds.