Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Hybridization model model helps explain molecules with double or triple bonds.
Which model helps explain molecules with double or triple bonds?

Ionic compounds contain cations and anions rather than discrete neutral molecules.
Ionic compounds contain cations and anions rather than what?

Coastline would you find most pollution of ocean water.
Where would you find most pollution of ocean water?