Key Idea Single bond =1σ, Double bond =1σ,1π; Triple bond =1σ and 2π. Alkynes form aromatic compounds when their vapours are passed over red hot copper or iron tubes. 
The number of sigma (σ) bonds present in the product (A) is 21.
NEET UG 2019 — Chemistry Organic Chemistry
2019mcqmedium
In the following reaction, 
the number of sigma( σ ) bonds present in the product A is
Official previous-year question
Held on 30 Apr 2019 · Verified 9 Jul 2026.
Options
- A
21
- B
9
- C
24
- D
18
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