Question

Words that end in -ción are generally what kind of nouns?

Answer 1

The nouns suffixed by -on, -ion, -d, -tad, -tud are feminine: (with accent over o in -on-ion)
razon reason, nacion nation, pared wall, libertad freedom, magnitud magnitude etc.

Answer 2

I don't think nouns suffixed by -on, -ion, -d, -tad, tud are feminine, unless they are adjectives. Like, trabajadora and activa. Hard-working and active.