题目

以下是四种毒品的结构简式，下列有关说法不正确的是（    ）A.这四种毒品都属于芳香族化合物B.K粉的分子式为C13H12ClNOC.摇头丸在一定条件下可发生消去反应D.1 mol大麻最多可与含3 mol Br2的溴水发生反应 答案：B 解析：K粉的分子式应为C13H16ClNO，B错误。摇头丸在浓H2SO4加热发生分子内脱水反应，是消去反应，C正确。1 mol大麻与溴反应，1 mol Br2在C=C上加成，2 mol在酚羟基邻位上发生取代反应，最多能与3 mol Br2反应。根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余。A: Hi, friends! Welcome to my town. I’m your guide, Miss Lin. You can ask me anything.B: OK. 【1】A: It’s over 45,000. B: 【2】A: It’s over 1,000 years old. It’s an old town.B: Wow, it’s so old. 【3】A: Qin River. It’s more than 800 meters.B: 【4】A: It’s in the southwest (西南) of our town. B: 【5】A: It’s about 3 kilometers. I’ll take you there later. B: I see. Thank you. A. How old is it?B. What’s the matter?C. Which is the longest river here?D. Where is it?E. Why don’t we take a bus there?F. What’s the population of your town?G. How far is it from here?