The resonance energy of benzene is_____________
36 kcal mole-1
30 kcal mole-1
25 kcal mole-1
20 kcal mole-1
How many nuclei are shared in localized chemical bonding?
Two
One
More than two
Zero
Monosubstituted benzene do not show _____________
position isomerism
chain isomerism
geometrical isomerism
all the above
How many s and p -bonds are present in benzene ?
12σ & 3π- bonds
6σ & 6π - bonds
3σ & 6π - bonds
6σ and 3π - bonds
Which is the main source of aromatic hydrocarbon?
Coal
Petroleum
Both a and b
None of these
Which type of compounds is known as aromatic compounds?
Benezoid compounds
Non- benezoid compounds
Aliphatic compounds
Alicyclic compounds
Which group will increase the rate of substitution of the substituents compared to benzene?
Meta directing
Deactivating
Ortho Para directing
Activating