Question

g Of the following substances, only ________ has London dispersion forces as its only intermolecular force. Of the following substances, only ________ has London dispersion forces as its only intermolecular force. AsH3 HI CCl4 C4H9OH F2S

Answer 1

Answer:

CCl4

Explanation:

Let us look at the structure of CCl4 closely in order to really determine if it is the correct answer to the question or not.

While it is true that the electro negativity of carbon is 2.5 and that of chlorine is 3.0, hence an electro negativity difference of 0.5 exists between carbon and chlorine leading to the presence of four polar covalent bonds in the carbon tetrachloride molecule. We must also observe that the molecule, carbon tetrachloride, has a tetrahedral molecular geometry. This implies that the four dipoles in the molecule are symmetrical and cancel out each other hence the molecule is non polar. Being a non polar molecule, only London forces are expected to be present as an intermolecular force, hence the answer.