• question_answer Which type of intermolecular forces exist among the following molecules? (i)${{H}_{2}}S$molecules  (ii) ${{H}_{2}}O$ molecules  (iii) $C{{l}_{2}}$ and $CC{{l}_{4}}$ molecules (iv) $Si{{H}_{4}}$ molecules (v) Helium atoms  (vi) He atoms and $HCl$ molecules

(i) Dipole-dipole interactions (because ${{H}_{2}}S$ is polar). (ii) Hydrogen bonding. (iii) London dispersion force (because both are non-polar). (iv) London dispersion forces (because $Si{{H}_{4}}$ is non-polar). (v) London dispersion forces (because He atoms have symmetrical electron clouds). (vi) Dipole-induced dipole forces (because HCl is polar while He atom has symmetrical electron cloud).