Heterocyclic 5 membered

Aromaticity order is as follows (related to electyronegativity)

• Thiophene > furan> pyrrole

• Thiophene > pyrrole > furan

• furan> pyrrole > Thiophene

• pyrrole > Thiophene >furan

Pyrrole is more acidic than pyrrolidine

• True

• False

Reactivity is as follows (related to the electronic effects of the heteroatoms)

• Thiophene > pyrrole > furan

• pyrrole > furan > Thiophene

• furan> pyrrole > Thiophene

Pyrrole can be nitrated using HNO₃ and H₂SO₄ whereas thiohene is sensitive to mineral acids

• True

• False

Furan can be sulphonated with

• pyridinium sulphonate

• Sulphuric acid

• acetyl nitrate

Dichlorocarbene CCl₂ is an...................

• Electrophile

• Nucleophile

• free radical