Question

Which of the following is not a true statement?
(1) Pyridine and pyrrole both are aromatic
(2) In pyridine lone pair of electron is involved in
delocalisation
(3) In pyrrole lone pair of electron is involved in
delocalisation
(4) Pyridine is more basic than pyrrole​

Answer 1

Answer:

4th and 3rd options are correct.

hope it helps

Answer 2

Statement 2 is not correct. Hence, the answer is Option B.

• Pyridine is more basic than pyrrole because the lone pair of electrons on N in pyridine and pyrrole are different.
• The pKa of pyrrole is 3.8, while that of pyridine is 5.14. The degree of basicity is determined by the availability of electron pairs. In this case, pyridine is the more powerful base.
• In pyrrole, the nitrogen atom's lone pair electrons combine with the two carbon-carbon double bonds in the 5-member ring to produce a conjugated system of pi electrons, increasing the molecule's stability.
• In contrast to benzene, pyridine already contains a stable conjugated structure of three double bonds in the aromatic hexagonal ring.
• As a result, the lone pair electrons on pyridine's N atom can readily be transferred to an H+ ion or a Lewis acid.  Thus, pyridine is a more powerful base than pyrrole.