31) Which of the following carbon molecules has sp hybridization? A) CH4 B) C2H2 C) Cl2CS D) CH3- E) CO2 32) Choose the INCORRECT statement about SnCl2. A) The hybridization of Sn is sp2. B) The molecule is linear. C) There is one lone pair of electrons on Sn. D) There are no Ï€ bonds. E) There are two σ bonds. 33) For the molecule A) the geometry about O is linear B) the hybridization on O is sp C) O is not hybridized D) both carbons are sp2 hybridized E) there are two Ï€ bonds between the two carbons 34) Which statement regarding VB theory is INCORRECT? A) A single bond is a sigma bond. B) A triple bond is two sigma bonds and a pi bond. C) A double bond requires each atom to have an unhybridized p orbital. D) Both atoms in a triple bond have linear geometry. E) sp3 hybridization produces tetrahedral geometry. 35) According to VB theory, sigma bonds are: A) always present in double bonds B) formed only by p orbitals C) formed only by hybrid orbitals D) formed only by s orbitals E) formed only by unhybridized orbitals 36) Ï€ bonds: A) are the only kind of bonds present in double bonds B) have very little electron density along the internuclear axis C) are formed by endwise overlap of p orbits D) are formed from hybrid orbitals E) are formed from s orbitals 37) A σ bond: A) can only be formed by s orbitals B) is weaker than a pi bond C) has high electron probability along the axis between atoms D) cannot be formed by two p orbitals E) is formed through side-on overlap of two atomic orbitals 38) The double covalent bond between two carbon atoms in ethylene (C2H4): A) is free to rotate because of delocalized electrons B) is a sigma bond C) consists of one sigma and one pi bond D) has a low electron density E) includes a “lone pair” of electrons on one of the carbons 39) Choose the INCORRECT statement about H3O+. A) There is one Ï€ bond. B) There are 3 σ bonds. C) There is one lone pair on O. D) The hybridization on O is sp3. E) The OH bonds are O(sp3) – H(1s). 40) A pi bond is: A) formed from two s orbitals B) formed from two p orbitals C) formed from hybridized orbitals D) formed from one s and one p orbital E) stronger than a sigma bond