As the $s$-character of a hybrid orbital increases,the bond angle

$C-H$ bond length is least in

Define the following terms:
$(i)$ Hybridisation
$(ii)$ $sp$ Hybridisation
$(iii)$ $sp^2$ Hybridisation
$(iv)$ $sp^3$ Hybridisation
$(v)$ Hydrogen bonding

The percentage $s$-character of the hybrid orbitals in methane,ethene,and ethyne are respectively:

Choose the correct code of characteristics for the given order of hybrid orbitals of the same atom,$sp < sp^2 < sp^3$:
$(i)$ Electronegativity
$(ii)$ Bond angle between same hybrid orbitals
$(iii)$ Size
$(iv)$ Energy level

An atom in a molecule has electrons in $1s, 2s, 2p, 3s, 3p, 3d$ and $4s$ orbitals. This atom can undergo hybridisations of type