Among P, Q, R and S, the aromatic compound(s) is (are)

 

Which of the following undergo electrophilic substitution reactions faster than benzene?

The total number of stable conformers with non-zero dipole moment for the following compound is/are

How many of the given molecules have zero dipole moment?

cis-$1,2$-dichloroethene, trans-$1,2$-dichloroethene, $1,1$-dichloroethene, trans-$2$-pentene, cis-$2$-pentene, $1$-butyne, trans-$2$-butene, cis-$2$-butene.

How many of the following on reductive ozonolysis will give only glyoxal?

$1,3$-butadiene, ethylene, acetylene, o-xylene, m-xylene, p-xylene, benzene, cyclobutadiene, cyclooctatetraene.

How many of the following species are aromatic in nature?

Cyclopentadienyl cation, cyclopentadienyl anion, tropylium cation, azulene, cyclopropenyl cation, tetrahydrofuran, cyclooctatetraene, furan, cycloheptatriene.

Among the following, the number of aromatic compound(s) is/are