19. Which one of the following has the smallest dipole moment? (A) acetonitrile (B) benzene (C) dichloromethane (D) ethanol (E) tetrahydrofuran

6. Which one of the following functions is the wave function of a sp hybridized orbital of an atom? (A) (1/2)1/2(ψ(s) + ψ(p)) (B) (1/3)1/2ψ(s) - (1/6)1/2ψ(px) + (1/2)1/2ψ(py) (C) (1/3)1/2ψ(s) - (1/6)1/2ψ(px) - (1/2)1/2ψ(py) (D) (1/2)(ψ(s) + ψ(px) + ψ(py) + ψ(pz)) (E) (1/2)(ψ(s) + ψ(px) - ψ(py) - ψ(pz))