Given are 4 pairs of covalent molecules. Identify the pair in which both molecules have the same shape.

Step-by-step solution

The shape of a molecule is determined by the arrangement of its atoms, which depends on the number of bonding pairs and lone pairs around the central atom according to VSEPR theory. For BF ₃ , the central atom B has 3 bonding pairs and 0 lone pairs, resulting in a trigonal planar geometry. For NH ₃ , the central atom N has 3 bonding pairs and 1 lone pair, resulting in a trigonal pyramidal geometry. They have different shapes. For XeF ₄ , the central atom Xe has 4 bonding pairs and 2 lone pairs, resulting in a squar