Neet Solved Paper 2015 Question 1
Question: Which of the following species contains equal number of $ \sigma $ and $ \pi $ -bonds?
Options:
A) $ HCO_3^{-} $
B) $ XeO _4 $
C) $ {{(CN)}_2} $
D) $ CH _2{{(CN)}_2} $
Show Answer
Answer:
Correct Answer: B
Solution:
- Structure $ \sigma $ and $ \pi $ bonds (a) $ \sigma $ bond - 4 $ \pi $ bond-1 (b) $ \sigma $ bond-4 $ \pi $ bond-4 (c) $ N\equiv C-C\equiv N $ $ \sigma $ bond-3 $ \pi $ bond-4 (d) $ N\equiv 2C-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}},-C\equiv N $ $ \sigma $ bond-6 $ \pi $ bond-4
