Which of the following statements are correct ?

Options

A. Azulene has a higher dipole moment than expected for a hydrocarbon
B.
C.
D. Percentage of p-isomer is greater when cholro benzene is brominated than during nitration

Answer

A, B, D

Explanation

Both the rings, each has `6pi` electrons and aromatic. As negative and positive charge are separated farther, dipole moment is large as d component is high
b) is less stable
c) is not correct , the conjugate base of
has `6pi` electron in both the rings. Conjugate base of former has 12 electrons.
d) is correct P-bromochloro benzene is 87% P-nitro chlorobenzene 6%