1. Tell me more about rice cake.

Question

2. Tell me a lot about rice cake.

(What is the part of speech of 'more'? A noun or an adverb? Are both the same?)

Answer 1

Both are correct if you add an "s" to cake.

"More" is a noun in this sentence.

You can see how "more" is used in these definitions.

http://dictionary.reference.com/browse/more