**Statement 1:** Dehydration of CH_3CH_2CH(OH)CH_3 gives CH_3CH_2CH = CH_2 as the minor product and CH_3CH = CHCH_3 as the major product. **Statement 2:** CH_2 = CH-CH(OH)-CH_3 can be dehydrated more readily than CH_3CH_2CH(OH)CH_3.

JEE Main Chemistry question

**Statement 1:** Dehydration of CH_3CH_2CH(OH)CH_3 gives CH_3CH_2CH{=}CH_2 as the minor product and as the major product. **Statement 2:** CH_2{=}CH-CH(OH)-CH_3 can be dehydrated more readily than CH_3CH_2CH(OH)CH_3.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for AssertionCorrect
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (B)

Solution

Statement 1 is true: dehydration of butan-2-ol follows Zaitsev's rule, giving the more substituted but-2-ene as the major product over the less-substituted but-1-ene. Statement 2 is also true independently: the allylic alcohol but-3-en-2-ol dehydrates faster than butan-2-ol

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Question ID VK-148664