Number of π bonds in HCN:
A1
B2 (in C≡N triple bond)
C3
D0
Answer & Solution
Correct answer: B. 2 (in C≡N triple bond)
HCN: H-C≡N. The C≡N triple bond is 1 σ + 2 π. The H-C is single (σ only). So total π bonds = 2.
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