Answer
(a) $CO_{2}$ - Dispersion forces
(b) $NH_{3}$ - Dispersion forces, Hydrogen bonding
(c) $CHCl_{3}$ - Dispersion forces, Dipole-dipole interactions
(d) $CCl_{4}$ - Dispersion forces
Work Step by Step
Dispersion forces are present in all substances and are the strongest forces in non-polar substances. They result from the formation of temporary dipoles.
(a) $CO_{2}$ - Dispersion forces - Non-polar molecule
(b) $NH_{3}$ - Dispersion forces, Hydrogen bonding - Hydrogen bonding is observed in polar covalent molecules containing Hydrogen bonded to one of the highly electronegative atoms - Nitrogen, Oxygen or Fluorine.
(c) $CHCl_{3}$ - Dispersion forces, Dipole-dipole interactions - Polar covalent molecules show dipole-dipole interactions as the partially positively charged atoms of one molecule get electrostatically attracted to the partially negatively charged atoms of another molecule.
(d) $CCl_{4}$ - Dispersion forces - Non-polar molecule
