Which orbitals of carbon are involved in what type of overlapping in forming the C-C bond of ethane ?

Does hydrogen bonding involved the overlapping in atomic orbital ?

According to VBT the extent of overlapping depends upon types of orbitals involved in overlapping and nature of overlapping. More will be the overlapping and the bond energy will also be high. Which of the following compound does not form p pi- p pi bond ?

According to VBT the extent of overlapping depends upon types of orbitals involved in overlapping and nature of overlapping. More will be the overlapping and the bond energy will also be high. Which of the following compound does not form p pi- p pi bond ?

According to VBT the extent of overlapping depends upon types of orbitals involved in overlapping and nature of overlapping. More will be the overlapping and the bond energy will also be high. Which of the following combination of orbitals does not form covalent bond (x-axis is inter nuclear axis) :

According to VBT the extent of overlapping depends upon types of orbitals involved in overlapping and nature of overlapping. More will be the overlapping and the bond energy will also be high. Which of the following combination of orbitals does not form covalent bond (x-axis is inter nuclear axis) :

According to VBT the extent of overlapping depends upon types of orbitals involved in overlapping and nature of overlapping. More will be the overlapping and the bond energy will also be high. Which of the following combination of orbitals does not form covalent bond (x-axis is inter nuclear axis) :