Question

Why does dehydration of 1-butanol, a primary alcohol, yield 3 products? ]

Answer 1

Do you mean `"1-butanol"` or `"2-butanol"`?

Explanation:

`"1-butanol"` should only give `"1-butylene"` on dehydration.

`"2-butanol"` could give some `"1-butylene"` on dehydration, but the major product should be `"2-butylene"` as an isomeric mix of cis and trans isomers. That is the dehydration of `"2-butanol"` should give three products.