melo. Aset with no elements is called null set or empty set. Falsel7 The intersection of two sets is the set of elements that belong to only one set. tru8. The union of two sets is the set of elements that belong to either set or both sets. 19. The complement of a set is the set of elements in the universal set that do not belong to th 20. The clue word for union of sets is "and" while the clue word for intersection of sets is "or" 21. Set operations include the union, intersection, difference and complementation 22. A set is any well defined collection of objects called elements. 23. A null set is a subset of any set. 24. The complement of set A is the whose elements of set A that do not belong to A. 25. AUU = U 28. Universal set is represented by a plane area 26. AUU 29. AU 27. Sometimes A- BB-A 30. ANO=​