(i) “Who is the Chancellor of your University”?

Concept Used: A statement is an assertive (declarative) sentence if it is either true or false but not both.

The given sentence is an interrogative sentence.

Hence, It is not a statement.

(ii) There are 31 days in a month

Concept Used: A statement is an assertive (declarative) sentence if it is either true or false but not both.

The given sentence is true for some particular months, and it is not true for others, so it may be true of false.

Hence, It is a not statement.

(iii) Hurray! We won the match.

Concept Used: A statement is an assertive (declarative) sentence if it is either true or false but not both.

The given sentence is in an exclamatory sentence.

Hence, It is a not statement.