There are five species P, Q, R, S and T. Spectroscopical analysis shows that P, Q and R are homonuclear diatomic species and have their bond order 2.5, 1.5 and 2.5 respectively and rest two species S

Question

There are five species P, Q, R, S and T. Spectroscopical analysis shows that P, 
Q and R are homonuclear diatomic species and have their bond order 2.5, 1.5 and 
2.5 respectively and rest two species S and T are heteronuclear diatomic species
and have bond order 3 and 2 respectively. All homonuclear diatomic species are 
paramagnetic and all heteronuclear diatomic species are diamagnetic in nature. 
P, R, S and T are monovalent positive ion and Q is monovalent negative ion :

Prashant Kotian · Accepted Answer

Correct answer: C. R (e.g. O2^+) has 15 electrons (paramagnetic). Addition of 1 e^- gives 16 electrons (O2), which is also paramagnetic.

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