Which of the following species is paramagnetic :

CHEMISTRY · Single correct · CBSE · Chemistry · Chemical Bonding and Molecular Structure · Chemical Bonding and Molecular Structure

Problem

Which of the following species is paramagnetic : (1)

\text{CN}^-

(2)

\text{NO}

(3)

\text{O}_2^{2-}

(4)

\text{O}_2