MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

BF _3 has a symmetrical trigonal planar geometry, so its net dipole moment is zero. In NH _3, the N-H bond dipoles and the lone pair dipole are in the same direction, which add up to give a high dipole moment. In NF _3, the N-F bond dipoles and the lone pair dipole are in opposite directions, which partially cancel each other, resulting in a lower dipole moment than NH _3. Therefore, the correct order of dipole moment is NH _3 > NF _3 > BF _3. Answer: NH _3 > NF _3 > BF _3