Question

Which pair of molecules has the strongest dipole-dipole interactions
(A) NH, and CH
(B) NH, and NH,
(C) CO, and Co
(D) CH, and CH​

Answer 1

Among the given pairs of molecules,

NH3 AND NH3

pair has two highly polar molecules that are even able to form hydrogen bonds with each other which is an extreme case of dipole-dipole forces.

Thus, the

NH3 AND NH3

pair has the strongest dipole-dipole interactions.

So the Answer Would be B :)

Answer 2

Answer:

Option(B) is correct.

Explanation:

• $NH_{3}$ molecules have the strongest dipole–dipole interactions since it is polar and intermolecular H-bonding is also present.

• In $CH_{4}$  and $NH_{3}$ , dipole-induced dipole interactions are present which is weaker than H-Bonding.

• In $CO_{2}$ , there are no dipole interactions possible, since the molecules are non-polar the net dipole moment is zero.

• In $CH_{4}$ and  $CH_{4}$  there are no dipole interactions possible, since the molecules are non-polar the net dipole moment is zero.