Ratio of number of hybrid orbitals to pure orbitals in ethyne molecule is

Number of ‘sp’ orbitals = 2 x 2 = 4Number of ‘p’ orbitals = 2 x 2 = 4Number of ‘s’ orbitals = 2 x 1 = 2Ratio of hybrid orbitals to pure orbitals = 4 : 6 Ratio of hybrid orbitals to pure orbitals = 2 : 3