5. Which of the species below, when dissolved in H2O, will not produce a basic solution? (A) SO2 (B) NH3 (C) BaO (D) Ba(OH)2 (E) none of these

11. Which of these statements about benzene is true? (A) All carbon atoms in benzene are sp3 hybridized. (B) Benzene contains only π bonds between C atoms. (C) The bond order of each C—C bond in benzene is 1.5. (D) Benzene is an example of a molecule that displays ionic bonding. (E) All of these statements are false.