An alkene on ozonolysis gives methanal as one of the products. Its structure is

Reaction of but$-2-$ene with acidic $KMnO_4$ gives:

Given the enthalpy of hydrogenation of these compounds will be in the order:

Rank the following alkenes in order of decreasing heats of hydrogenation (largest first):
$1$. $1-$butene
$2$. $2-$methyl$-2-$butene
$3$. trans$-2-$butene
$4$. cis$-2-$butene

What is the major product obtained when $1$-butanol is heated with concentrated $H_2SO_4$?

Find out the major product formed from the following reaction. $[Me = -CH_3]$