Question

Molecules that have planar configurations include which of the following?I. BCl3 II. CHCl3 III. NCl3

(A) I only
(B) III only
(C) I and II only
(D) II and III only
(E) I, II, and III

Answer 1

Molecules that have planar configurations include BCl3.

Step-by-step explanation:

Molecules that have planar configurations include:

1. BCl3: BCl3 has a trigonal planar electron-pair geometry and a trigonal planar molecular structure. The B-Cl bonds lie in a plane with 120° angles between them.
2. CHCl3: CHCl3, also known as chloroform, has a tetrahedral electron-pair geometry, but its molecular structure is considered trigonal planar due to the presence of a lone pair on the central carbon atom.
3. NCl3: NCl3 has a trigonal pyramidal electron-pair geometry, which results in a trigonal pyramidal molecular structure. It does not have a planar configuration.

Therefore, the correct answer is (A) I only, which includes BCl3.