How many types of polymerisation are possible in alkynes?

State Huckel's rule of aromaticity and explain it interms of cyclopentadiene, cycloxtateraene and cyclopropenylcation.

Among anthracene and cyclopentadiene which is aromatic? Give reason for your answer.

What are vicinal dihalides? How will you prepane alkene from vicinal dihaldes?

Why alkenes are more reactive than alkanes?

Explain the mechanism of addition of HBr to propene.

Explain the sulphonation of benzene.

What is BHC? How will you prepare BHC? Mention its uses.

In aryl halides, halogen group is a ortho-para director and a deactivator towards electrophilic substitution reactions, why?

Arrange benzene, n-hexane and ethyne in decreasing order of acidic behavior. Also give reason for this behavior?