NEET Solved Paper 2019 Question 3
Question: Which of the following diatomic molecular species has only $ \pi $ bonds according to Molecular Orbital Theory? [NEET 5-5-2019]
Options:
A) $ C _2 $
B) $ Be _2 $
C) $ O _2 $
D) $ N _2 $
Show Answer
Answer:
Correct Answer: A
Solution:
- $ C _2=\sigma 1s^{2}\sigma *1s^{2}\sigma 2s^{2}\sigma *2s^{2} $ $ \pi 2p_x^{2},\pi 2p_y^{2} $ 12 $ {e^{-}} $ has only $ \pi $ bonds according to M.O.T. In $ C _2 $ molecule, only $ \pi $ electron occupied the bonding molecular orbital.
