EASY
JEE Advanced
IMPORTANT
Earn 100

The carbon-carbon double bond energy in C2H4 is 615 kJ/mol and the carbon-carbon single bond energy in C2H6 is 347 kJ/mol. Why is the double bond energy appreciably less than twice the single bond energy?

Important Questions on Chemical Bonding and Molecular Structure

EASY
JEE Advanced
IMPORTANT
The two -CH2 groups in C2H4 do not rotate freely around the bond connecting them, although the two -CH3 groups in C2H6 have almost an unhindered rotation around the C-C bond. Why?
EASY
JEE Advanced
IMPORTANT
The strength of the bonds by the overlapping of the atomic orbitals is in the order:
MEDIUM
JEE Advanced
IMPORTANT
Main axis of a diatomic molecule is z. The molecular orbitals, px and py, overlap to form, which of the following orbitals?