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Considering the state of hybridization of carbon atoms, find out the molecule among the following which is linear?

1. CH3−CH=CH−CH3
2. CH3−C≡C−CH3
3. CH2=CH−CH2−C≡CH
4. CH3−CH2−CH2−CH3

Correct answer: CH3−C≡C−CH3

Solution

In option B, the carbon atom involved in the triple bond (C≡C) is sp-hybridized, which results in a linear geometry. The other options involve sp2 or sp3 hybridized carbons, which are not linear.

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