Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Chemical Bond and Molecular Structure
Which of the following is paramagnetic?
1
CN
2
CO
3
\({\rm{O}}_2^ - \)
4
More than one of the above
5
None of the above