JEE Main Solved Paper 2017 Question 22
Question: Which of the following species is not paramagnetic :- [JEE Main Solved Paper-2017]
Options:
A) NO
B) CO
C) $ O _2 $
D) $ B _2 $
Show Answer
Answer:
Correct Answer: B
Solution:
$ NO\Rightarrow $ One unpaired electron is present in $ {{\pi }^{*}} $ molecular orbital.
$ CO\Rightarrow $ No unpaired electron is present $ {O_2}\Rightarrow $ Two unpaired electrons are present in $ {{\pi }^{*}} $ molecular orbitals.
$ {B_2}\Rightarrow $ Two unpaired electrons are present in $ \pi $ bonding molecular orbitals.
