Question

Which of the following is large anion?

1.F-

2.O2-

3.N3-

4.O-

Please give explanation along with the answer

Answer 1

2. O2 because oxygen having largest anion compare to other of these elements

Answer 2

N3- is the largest
this is because option 1, 2, 3are isoelectronic species. and in isoelectronic species size of anions are always greater than cations.

among anions the more charge the anion has the larger is it's size.
hence option 3 is the largest........

(aur last option ka toh sawal hi nahi uthta....)