Question

what is the the meaning for?

que ?
qui ?
quelle ?
quel ?
quand?


And what's the difference
between quelle and quel?

Answer 1

bonjour, mademoiselle. Ca Va?
the answer is one is feminine and one is masculine quelle is feminine and quel is mascualin

Answer 2

And what's the difference
between quelle and quel?

Exemple :

Quel beau temps ! (masculin)    Quelle agréable journée! (féminin)


QUI  :  pour parler d'une personneExemple : Qui frappe à la porte ? (quelle personne ?)