In the following reaction H3C−C≡CH →873K red hot iron tube A ,the number of sigma (σ) bonds present in the product A is

H3C − C≡CH →873 K, red hot iron tube AAnalysis:Under the given conditions (873 K and a red hot iron tube), the terminal alkyne (H3C − C≡CH) undergoes trimerization to form benzene (C6H6) as the product A.Structure of Benzene (C6H6):Benzene has a cyclic structure with 6 carbon atoms and alternating double bonds (a delocalized π-electron system).Each carbon atom in benzene forms:Two single bonds (σ bonds) with adjacent carbon atoms.One single bond (σ bond) with a hydrogen atom.Total Sigma (σ) Bonds in Benzene:Carbon-Carbon single bonds (C-C): 6 bonds (one σ bond per bond in the benzene ring).Carbon-Hydrogen single bonds (C-H): 6 bonds (one σ bond per C-H bond).Thus, the total number of σ bonds in benzene is:6 (C-C bonds) + 6 (C-H bonds) = 12 σ bonds.Answer: Since A (benzene) has 12 σ bonds, none of the options provided (21, 9, 24, 18) are correct. Could you confirm the options? It seems there's a mismatch in the options or interpretation of the question.

In the following reaction H3C−C≡CH →873K red hot iron tube A ,the number of sigma (σ) bonds present in the product A is

H3C − C≡CH →873 K, red hot iron tube AAnalysis:Under the given conditions (873 K and a red hot iron tube), the terminal alkyne (H3C − C≡CH) undergoes trimerization to form benzene (C6H6) as the product A.Structure of Benzene (C6H6):Benzene has a cyclic structure with 6 carbon atoms and alternating double bonds (a delocalized π-electron system).Each carbon atom in benzene forms:Two single bonds (σ bonds) with adjacent carbon atoms.One single bond (σ bond) with a hydrogen atom.Total Sigma (σ) Bonds in Benzene:Carbon-Carbon single bonds (C-C): 6 bonds (one σ bond per bond in the benzene ring).Carbon-Hydrogen single bonds (C-H): 6 bonds (one σ bond per C-H bond).Thus, the total number of σ bonds in benzene is:6 (C-C bonds) + 6 (C-H bonds) = 12 σ bonds.Answer: Since A (benzene) has 12 σ bonds, none of the options provided (21, 9, 24, 18) are correct. Could you confirm the options? It seems there's a mismatch in the options or interpretation of the question.

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In the following reaction $H_{3} C - C \equiv CH \to_{873 K}^{red hot iron tube} A$ ,
the number of sigma $(σ)$ bonds present in the product A is

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Detailed Solution

H₃C − C≡CH →_{873 K, red hot iron tube} A

Analysis:

Under the given conditions (873 K and a red hot iron tube), the terminal alkyne (H₃C − C≡CH) undergoes trimerization to form benzene (C₆H₆) as the product A.

Structure of Benzene (C₆H₆):

Benzene has a cyclic structure with 6 carbon atoms and alternating double bonds (a delocalized π-electron system).
Each carbon atom in benzene forms:
- Two single bonds (σ bonds) with adjacent carbon atoms.
- One single bond (σ bond) with a hydrogen atom.

Total Sigma (σ) Bonds in Benzene:

Carbon-Carbon single bonds (C-C): 6 bonds (one σ bond per bond in the benzene ring).
Carbon-Hydrogen single bonds (C-H): 6 bonds (one σ bond per C-H bond).

Thus, the total number of σ bonds in benzene is:

6 (C-C bonds) + 6 (C-H bonds) = 12 σ bonds.

Answer: Since A (benzene) has 12 σ bonds, none of the options provided (21, 9, 24, 18) are correct. Could you confirm the options? It seems there's a mismatch in the options or interpretation of the question.