Question

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which of the following is most basic??​

Answer 1

Answer:

Basicity is enhanced by the presence of electron donating group & availability of a lone pair of electrons on the nitrogen atom. Hence is most basic.

Explanation:

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Answer 2

Answer:

in option 3,4 the lone pair of electron is in conjugation with the ring and double bond of CO respectively and in option 1 the e- would be dispersed .

therefore option 2 (aniline) is the most basic in nature as it can easily loose electrons.

hope it helps..