Aren't some of the answers to question 1 ambiguous with regard to their correctness?

Question

I understand that "Vous pouvez prendre tout ce qu'est sur la table" is the answer to question 1 because it should be using "ce qui" instead of "ce que." But aren't the other questions which use "tout" also possibly incorrect. For example, in "Tout ce qu'il fait m'agace," wouldn't this be incorrect if "tout" was being used as a noun instead of a pronoun? In such case, the "ce" should be dropped to be correct.

Answer

Bonjour Don !

I had a look at the lesson, and actually the question you're referring to was "Which is *not* correct?", the answer being indeed "Vous pouvez prendre tout *ce qu'*est sur la table." as "ce qui" would be the correct option here.

As for the case of "tout ce que/tout ce qui", this is actually the object of a different lesson in the system, so thanks to you, I've now moved this question accordingly.
Note that "tout" used on its own (not like "le tout") is always a pronoun followed by "ce".

Have a look at our lesson on "tout ce que/tout ce qui":
https://french.kwiziq.com/revision/grammar/tout-ce-qui-tout-ce-que-all-everything-that

I hope that's helpful!
À bientôt !

Answer

So then I guess my real problem was knowing when "tout" was a noun, which was crucial to knowing whether to use "ce" or not. You're saying the only time "tout" is a noun is when it is preceded by an article? If so, would these two sentences then be correct? "C'est le tout que nous devons. C'est tout ce que nous devons." Thanks for your help.