Quiz | Covalent Bonding
The double bond of an alkene is composed of:
1 σ + 1 π bond
1 σ + 1 lone pair of electrons
2 σ bonds
2 π bonds
Double bond: 1 σ + 1 π bond
Which of the following statements about σ molecular orbital is incorrect?
It may result from overlap of p atomic orbitals perpendicular to the molecular axis
It may result from overlap of 2 s atomic orbitals
It may be either bonding or antibonding
None of the above
What type of hybrid orbitals are involved in bonding of CO2?
2 electron groups around the central carbon atom (2 neighboring atoms + 0 lone pair) ⇒ sp hybridization
What type of hybrid orbitals are involved in bonding of ClO3-?
4 electron groups around the central chlorine atom (3 neighboring atoms + 1 lone pair) ⇒ sp3 hybridization
Which of the following statements is incorrect?
Bonding MO is lower in energy than the AOs
Number of hybrid orbitals formed = number of atomic orbitals combined
sp3d hybridization is the combination of 1 s-orbital + 3 p-orbitals + 1 d-orbital
2 overlapping atomic orbitals may form 2 bonding molecular orbitals
2 overlapping atomic orbitals form 1 bonding MO and 1 antibonding MO
What is the number of unpaired electrons in the B2 molecule?
electronic configuration of B (Z = 5): 1s2 2s2 2p1
electronic configuration of B2: (σ1s)2 (σ*1s)2 (σ2s)2 (σ*2s)2 (π2py) (π2pz) ⇒ 2 unpaired electrons