AP Chemistrymediummcq1 pt
Which molecule has a net dipole moment?
A.CCl₄
B.CHCl₃
C.CO₂
D.XeF₄
Explanation
Core Concept
Chloroform is tetrahedral, but its substituents differ: three polar C-Cl bonds point toward chlorine corners while the feeble C-H bond points the fourth way. The dipoles therefore fail to cancel, leaving a net pull toward the chlorine side of the molecule. Cancellation requires identical bonds arranged symmetrically, which mixed substitution destroys.
Correct Answer
BCHCl₃
More Unit 2: Molecular and Ionic Compound Structure and Properties practice questions
- mediumWhich of these statements about formal charge is true?
- easyWhich bond is most polar?
- mediumBond length in diatomic molecules generally increases down a group (F₂ < Cl₂ < Br₂ < I₂). Why?
- easyWhich molecule's central atom has exactly two lone pairs?
- mediumWhich ion has all atoms in one plane?
Practice more AP Chemistry questions with full explanations
Practice Unit 2: Molecular and Ionic Compound Structure and Properties Questions →