40. Which of the following statements regarding dispersion forces is false? Elec

Question

40. Which of the following statements regarding dispersion forces is false? Electrons in one molecule can experience attractions to nuclei in a neighboring nonbonded molecule. Temporary dipoles can arise when electrons are temporarily asymmetrically redistributed around the nucleus of an atom or within a bond. a. b. c. As electron cloud size increases, the strength of dispersion forces increases. d. The dipole moments associated with dispersion forces are long-lasting e. Temporary dipoles can induce dipoles in other particles.

Explanation / Answer

40. False statement : d. The dipole moments associated with dispersion forces are long-lasting.

The electronic cloud in a molecule gets redistributed as atoms repel each other. This redistribution of electronic density give rise to the formation of instantaneous dipoles, which are responsible for the dispersion forces. These dipoles change randomly with electronic redistribution. Hence they are not long-lasting.

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