In benzene,the $1, 3$ position is called:

Arrange the following compounds in decreasing order of their reactivity towards electrophilic substitution $(E^{+})$:
$C_6H_5NH_2$,$C_6H_5NHCOCH_3$,$C_6H_6$,$C_6H_5SO_3H$

The reaction of benzene with isobutylene in the presence of $H_2SO_4$ gives:

Which of the following groups,when attached to a benzene ring,acts as a deactivating meta-directing group?

Which of the following oil is obtained from benzene after fractional distillation of coal tar?

Identify the major product $A$ formed in the following Kolbe's electrolysis reaction: