What is sets in general collection of things

which one of the following set of ions represent a collection of isoelectronic species?

Which of the following collections are sets? (i) The collection of honest persons in india (ii) The collection of all prime number between 14 and 50. (iii) The collection of all factor of 24 which are less than 20. (iv) The collection of all the rivers of india.

What is meant by germplasm collection what are its benefits ?

What is meant by germ plasm collection? Why is it necessary?

What is the difference between a collection and a set? Give reasons to support your answer?

Which of the following are sets? (i) The collection of amazing persons in the world (ii) The collection of all the composite numbers (iii) The collection of all letters of the word INDIAN (iv) The collection of all factors of 32.

Which one of the following sets of ions represents the collection of isoelectronic species?

Which one of the following sets of ions represents the collection of isoelectronic species?