Question

Dipole induced dipole interactions are present in which of the following pairs :

a) SiF4 and He atoms
b) H2O and alcohol
c) Cl2 and CCl4
d) HCl and He atoms ​

Answer 1

Among given pairs, dipole induced dipole interactions are present in -

d) HCl and He atoms

•Dipole induced dipole interactions are found in one polar and one non-polar interacting entities.

•A dipole is the presence of partially positive and partially negative charge on atoms.

•It occurs due to the difference in electronegativity.

•Among the given options, only HCl and He are polar and non-polar interacting molecules and atoms.

•Thus, dipole induced dipole interactions will occur between HCl and He.

Answer 2

Dipole induced ‘dipole interactions’ are present in HCl and He atoms.

Option: (d)

Explanation:

• Dipole induced dipole interaction is a type of vanderwaal force. In this type of vanderwaal force between two substances, one of the substance must have some permanent dipole moment whereas the other substance should have no dipole moment.  

• If we check every option: in case of $\bold{\mathrm{SiF}_{4}}$ and He, $\bold{\mathrm{Cl}_{2}}$ and $\bold{\mathrm{CCl}_{4}}$ both the substances are nonpolar in nature and hence it can never have dipole induced dipole interaction.  

• In case of water and alcohol, both the substances have permanent dipole moment and hence they can also not have dipole induced ‘dipole interaction’.  

• In the correct answer is hydrochloric acid and helium : hydrochloric acid have permanent dipole moment whereas Helium has no dipole moment.

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