COMEDK · Chemistry · 4. Chemical Bonding and Molecular Structure

In acetylene molecule, between the carbon atoms there are

A three \(\sigma\)-bonds
B two \(\sigma\) and one \(\pi\)-bonds
C one \(\sigma\) and two \(\pi\)-bonds
D three \(\pi\)-bonds

Verified Solution

Answer & Solution

Correct Answer

(C) one \(\sigma\) and two \(\pi\)-bonds

Step-by-step Solution

Detailed explanation

In acetylene, between carbon atoms, there are one \(\sigma\) and two f-bonds i.e.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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