[sci4life]

is the bond

C-C-C and O and H attached to the middle C is sp3 bond?

How many carbon are sp3 in this compound?...I'm kinda confused about sp3 thing....when we look for sp3 orbital..do we count lone pair in it or not?

[Mitch]

Only count Carbons as sp3.

[AWK]

All carbon atoms have sp3 hybridization, all bonds in maltose are sigma bonds

[Donaldson Tan]

according to VSEPR, an atom is said to be sp3 hybridised if its valence shell contains 4 electron pairs. an electron pair is either a lone pair or bonding pair. consequently, sp3 hybridised atoms exihibits tetrahedral electron pair geometry

[dexangeles]

normally..

when a carbon has 4 bonds, it's sp3 hybridized  (1s orbital, 3 p orbitals = 4)
when a carbon has 3 bonds (1 is a double bond) it's sp2 hybridized (1s orbital, 2 p orbitals = 3), the unhybridized Pz orbital forms the Pi double bond
when a carbon has 2 bonds (both being double bonds), it's sp hybridized (1s orbital, 1p orbital = 2), the Py and Pz unhybridized orbital for the 2 double bonds

remember lone pairs count as hybridized