Hi Tiffany,

Quel/quels/quelle/quelles are interrogative adjectives agreeing with the noun in gender and number and making reference to noun(s) or person(s).

I can't think of a situation where the "question" would appear at the end of a sentence.

Bonne continuation,

Jim

Although "quel" doesn’t literally go at the end of a sentence, it’s usually describing a noun - surely the combination can indeed go at the end, informally?  So you could have "Tu as choisi quels bonbons ?"

 (Hope I’m right in thinking the past participle doesn’t now agree because it’s placed before "quels")