Major product of the dehydration of alcohols Well I was doing some questions and I have a bit of confusion on dehydration reaction. For instance, consider following reaction:

How do I decide which adjacent hydrogen gets attracted by $\ce{HSO4-}$?

now we have 3 possibilities:

either hydrogen 1,2, or 3 can leave resulting in 3 different products. So my question is how do I identify the major product in this case?
The mechanism of dehydration of 2° alcohol at high temperature (around 170°C-180°C) happens via $E_1$ mechanism. This means that the major product will be decided by the $\mathbf {Zaitsev}$ $\mathbf{rule}$, which says that major product will be the stables one. If you compare the three alkenes, you'll see that the middle compound you've drawn has the most hyperconjugative structures, and hence is the stablest. Therefore, that will be the major product.