what about noun cases topic mentioned in the chapter

Your query is not very clear to us. If you are asking about the cases of nouns, then they have been given below:

Nominative Case: When the noun is used as Subject of a verb.

For example, John threw a stone.

Objective or Accusative Case: When the noun is used as an Object of as verb.

For example, John threw a stone.

Possessive Case: When the noun denotes possession.

For example, The king's men have arrived.