How many sigma and how many pi bonds are present in the ethene molecule (C2H4)?
A4 sigma and 1 pi
B4 sigma and 2 pi
C5 sigma and 2 pi
D5 sigma and 1 pi
A4 sigma and 1 pi
B4 sigma and 2 pi
C5 sigma and 2 pi
D5 sigma and 1 pi