RRB Group-D Model Paper 13 with answers for online practice

Concept

• Huckel proposed that aromaticity is a function of electronic structure.
• A compound may be aromatic if it obeys the following rules
• The molecule must be co-planar
•  Complete delocalization of π electron in the ring
•  Presence of (4n+2) π electrons in the ring where n is an integer (n=0,1,2….)This is known as Huckel’s rule.

Explanation

• Furan has a planar ring structure.
• if has 6 delocalised electrons
• 4n+2 = 6 n=1 it obeys Huckel’s (4n+2) π electron rule with n = 1.hence, it is aromatic