Question

the dominant type of intermolecular force in a sample of ncl₃ is _____________.
covalent
dipole
dispersion
ionic
hydrogen bonding

Explanation:

First, identify the nature of NCl₃: it is a covalent molecule (not ionic). Covalent bonds are intramolecular, not intermolecular, so "covalent" is incorrect. NCl₃ has a trigonal pyramidal shape, with a net dipole moment due to the electronegativity difference between N and Cl, making it a polar molecule. Polar molecules exhibit dipole-dipole intermolecular forces. Dispersion forces exist in all molecules but are not dominant here. Hydrogen bonding requires H bonded to N/O/F, which is absent in NCl₃.

Answer:

B. dipole