`CH_(3) -overset(CH_(3))overset(|)underset(Cl) underset(|)(C)-CH_(2) - CH_(3) overset(C_(2)H_(5)ONa//C_(2)H_(5)OH)(to) underset("(major)")underset("2-methyl 2-Butene")(CH_(3)- overset(CH_(3))overset(|)(C)=CH- CH_(3)) + CH_(2) underset("(minor)")underset(2-"methyl 1-Butene")(=overset(CH_(3))overset(|)(C)-CH_(2) - CH_(3))`