Qui
Who
Que
What
Quoi
What*
A form of ‘que’ - after a preposition or at the end of a sentence, whereas ‘que’ is at the beginning [usually]
Où
Where
Quand
When
Pourquoi
Why
Comment
How
Combien
How much/many
Quel/Quels/Quelle/Quelles
Which/ Who
When we want to ask which of something, broadly, we use quel. This breaks down as quel form masculine singular nouns, quels for masculine plural (or plural mixed gender) nouns, quelle for feminine singular nouns, and quelles for feminine plural nouns.
Laquel/le
Which one?
À qui + à quoi
Whose/Of What?