試題詳解

10. The following statements describe the chemical and physical properties of some representative elements and their compounds. Which statement is   incorrect  ?
(A) Diborane (B₂H₆) has two three-center two-electron B-H-B bonds.
(B) Lithium metal is converted to lithium superoxide in the presence of excess molecular oxygen.
(C) Al₂O₃ is amphoteric and can dissolve in both acidic and basic solutions.
(D) The hydration of F¯ decreases the entropy when HF dissociates in water, which contributes to make HF a weaker acid than HCl and HBr.
(E) SiC is an extremely hard substance because it has a covalent network structure similar to diamond.