Select the five membered Heterocyclic compounds

Furan, pyrrole & thiophene undergoes electrophilic substitution at ........ position

Thiophene can not be prepared from

Reaction of furan with acetyl chloride in presence of AlCl3 gives

Reaction of pyrrole with conc.H2So4 undergoes Sulphonation gives

Reaction of Acetylene with ammonia in Red hot tube gives

Furan on hydrogenation gives

What is the product of the reaction?

What is the reagent of the reaction?

What is the hybridization of oxygen in furan?

In which orbitals the lone pair electrons on oxygenare situated in furan?

Why pyrrole is only weakly basic?

Which of the following five membered rings is most resonance stabilized?

What is the correct order of reactivity (most reactive first) of pyrrole, furan and thiophene towards electrophiles?