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The molecular structure of CH2 = CH – C ≡ CH involves four carbon atoms. What is the hybridization of these carbons in sequence from left to right?

1. sp2, sp2, sp2, sp3
2. sp2, sp3, sp2, sp2
3. sp3, sp2, sp2, sp2
4. sp2, sp2, sp, sp

Correct answer: sp2, sp2, sp, sp

Solution

The first carbon (CH2=) is sp2 hybridized due to the double bond. The second carbon (=CH-) is also sp2 hybridized. The third carbon (-C≡) is sp hybridized due to the triple bond, and the fourth carbon (-CH) is sp hybridized as well. Thus, the correct sequence is sp2, sp2, sp, sp.

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