7
6
5
4
Iso−pentane and neo−pentane
Glucose and fructose
Ethanol and dimethyl ether
α−Naphthol and β−Naphthol
9 sigma bonds, 1 pi bond and 2 lone pairs
8 sigma bonds, 2 pi bonds and 2 lone pairs
10 sigma bonds, 1 pi bond and 1 lone pair
9 sigma bonds, 2 pi bonds and 1 lone pair
n−butane
2,4−dimethyl pentane
Benzene
None of the above