'Come on, it's time to go home' here home is an adverb or noun? [duplicate]

I have 2 options. A) Noun B) adverb then what should be the answer.

Solution 1:

You can test each possibility by substitution with words that you are confident are nouns, adverbs and so on.

Noun: “it’s time to go * car” - this doesn’t work.

Adverb: “it’s time to go quietly” - this is grammatical, but quietly provides the manner of going while home in the original quote doesn’t.

Preposition: “it’s time to go up” - this is grammatical and carries something of the sense of the original.

So “home” acts as a preposition in your example (as noted by several commenters to your question).