有机物A和B的分子中都有2个碳原子，室温时A为气体，B为液体，A在一定条件下可以直接转化为C，将B的蒸气通过灼热的氧化铜，产生红色固体，同时生成C。则3种物质可以是
A．A是CH2=CH2，B是CH3CHO，C是CH3CH2OH
B．A是CH≡CH，B是CH3CH2OH，C是CH3CHO
C．A是CH3CHO，B是CH2=CH2，C是CH3CH2OH
D．A是CH3CH2OH，B是CH3CH3，C是CH≡CH
答案：B
题目分析：将B的蒸气通过灼热的氧化铜，产生红色固体，同时生成C，这说明B是醇类，C是醛类。又因为A是气体，含有2个碳原子，且A在一定条件下可以直接转化为C，所以A是乙炔，乙炔和水发生加成反应，即生成乙醛，即C水乙醛，则B水乙醇，答案选B。
点评：该题是中等难度的试题，试题基础性强，注重答题的灵活性，侧重考查学生对常见官能团的转化，有利于培养学生逻辑推理能力。该题的关键是熟练记住常见官能团的结构和性质，然后具体问题、具体分析即可。
词语填空 10%
Dear Ronny, Years ago you came to me for help. You said, "Grandpa, how could you do so 小题1: in your life? You're still active to your life, but I'm already tired of 小题2: for my life. How can I get the same thing that you've got?" I didn't know what to say to you. But when I know there are few days left for me, I tell 小题3: that I should give you an answer. So here is what I believe. First, you should know that life is filled(充满) with 小题4: , and many of them are good ones. If you don't keep your eyes 小题5: , you'll miss a number of good surprises in your life. When you meet challenges, don’t run away, just welcome them. They'll make you stronger, 小题6: and cleverer than you were before. When you do something wrong, you should be thankful for the things it gave you. And then, you should use this lesson to help you 小题7: your dream come true. It's also important to decide what you want. Then keep your dream , work hard for it, and be ready to receive it. It will come true more quickly. And always follow the rules, even the little ones. When you follow the rules, life will work well. 小题8: you think you can live without the rules, you're only fooling(愚弄) yourself. There will be more chances 小题9: you are growing up. So you have to be brave enough to move from a known place to an unknown place. Life isn't just like climbing one mountain. It is also a part of your life to move 小题10: one top to the next. If you rest for a too long time, you may fail at last. Leave the past in the past. Climb the next mountain and enjoy the fight in your life. The person that can win is the one who wants to win. Love always, Grandpa |
