SOLVED

41) According to VB theory, a double bond that results from the sharing of four electrons consists of: A) 2 sigma bonds B) one sigma and one pi bond C) one sigma bond D) two pi bonds E) one sigma bond and one coordinate bond 42) Choose the INCORRECT statement about NH4+. A) The hybridization of N is sp3. B) The molecule is tetrahedral. C) There is one lone pair of electrons on N. D) There are no Ï€ bonds. E) There are four σ bonds. 43) Choose the INCORRECT statement about AsF6-. A) The hybridization is sp3d2. B) The molecule is octahedral. C) There are no Ï€ bonds. D) There is one lone pair of electrons. E) There are six σ bonds. 44) Choose the INCORRECT statement about CO2. A) There are two Ï€ bonds. B) There are two σ bonds. C) C has one lone pair. D) The hybridization on C is sp. E) The molecule is linear. 45) Choose the INCORRECT statement about NO2+. A) There is one Ï€ bond. B) There are two σ bonds. C) The hybridization is sp. D) There are no lone pairs on N. E) There are two lone pairs on each O. 46) The structure of aspirin is given below. A) sp3-sp2 B) sp3-sp3 C) sp2-sp2 D) sp-sp2 47) Which of the following statements is INCORRECT? A) A double bond is stronger than a single bond for the same atoms. B) A double bond is less than twice as strong as a single bond for the same atoms. C) Bonded atoms cannot rotate freely around a double bond. D) Molecular geometry depends on the σ bond framework. E) There are no hybridized orbitals in multiple bonds. 48) According to the molecular orbital (MO) theory, when two oxygen atoms bond together, their 2p orbitals combine to form: A) two sigma molecular orbitals (MOs) and four pi MOs B) two sigma MOs and two pi MOs C) four pi MOs only D) one sigma and one pi MO E) a delocalized set of MO 49) Which statement is INCORRECT about molecular orbital theory? A) The number of molecular orbitals produced is equal to the number of atomic orbitals combined. B) Each pair of sigma molecular orbitals is a bonding orbital and an antibonding orbital. C) The antibonding orbital is at a lower energy than the bonding orbital. D) The bond order (BO) is . E) Hund’s rule says that each orbital of identical energy has one electron before pairs are formed. 50) According to Molecular Orbital (MO) theory, which statement below is true? A) A molecule with an even number of electrons must be diamagnetic. B) There are as many sigma bonds as pi bonds in a molecule. C) There are as many molecular orbitals as there are atomic orbitals. D) There are as many bonding as antibonding electrons in a molecule. E) All molecules contain pi bonds.