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The major product [B] in the following reactions is: CH3–CH2–CH(CH3)–CH2–OCH2–CH3 HI, Heat → [A] alcohol H2SO4, Δ → [B]

1. CH3–CH2–C(CH3)=CH2
2. CH3–CH2–CH=CH–CH3
3. CH3–CH=C(CH3)–CH3
4. CH2=CH2

Correct answer: CH3–CH=C(CH3)–CH3

Solution

The correct option is CH3–CH=C(CH3)–CH3 because the dehydration of the alcohol under acidic conditions leads to the formation of an alkene, and the structure indicates that a double bond is formed between the second and third carbon atoms, with a methyl group attached to the third carbon, which is consistent with the elimination reaction.

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