Question

question
polar molecules have attractive dipole - dipole interactions when the dipoles are arranged in which of the following geometries?
select all that apply:
□ head - to - tail: →→
□ head - to - head: →←
□ side - to - side, antiparallel: ↑↓
□ side - to - side, parallel: ↑↑

Explanation:

Dipole - dipole interactions are attractive when opposite charges are close. In head - to - tail arrangement, the positive end of one dipole is close to the negative end of another. In side - to - side, antiparallel arrangement, opposite charges are also in close proximity. In head - to - head and side - to - side, parallel arrangements, like charges are close which leads to repulsion.

Answer:

head - to - tail: →→, side - to - side, antiparallel: ↑↓