Question

How many sigma and pie bonds in nepthelene???

Answer 1

There are 19 sigma bonds. and 5 pie bonds in nepthelene.

Answer 2

As each double bond in a molecule consists of a sigma bond and a pie bond, therefore in naphthalene there are total 19 sigma bonds (6 C-C single bonds, 8 C-H single bonds and 5 from C=C bonds) and 5 pie bonds.