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NEET levelSingle correct optionDifficulty 1 of 3g1236

How many pi electrons are present in the ring of the compound shown (counting the oxygen lone pair that is part of the cyclic conjugation)?

A4
B6
C8
D10

Answer: B

The compound shown is furan. Two C=C bonds give 4 pi electrons and one lone pair on oxygen in a p orbital gives 2 more. The total is 6.

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