单选题:下列一组反应的反应类型相同的是A由溴乙烷制乙醇;由乙烯与水反应制乙醇 B乙烯使溴的四氯化碳褪色,甲苯使KMnO4酸性溶液褪色 C苯与浓硝酸、浓硫酸混合共热制

题目内容:

下列一组反应的反应类型相同的是

A由溴乙烷制乙醇;由乙烯与水反应制乙醇        

B乙烯使溴的四氯化碳褪色,甲苯使KMnO4酸性溶液褪色    

C苯与浓硝酸、浓硫酸混合共热制取硝基苯;苯与液溴在催化剂存在下制取溴苯        

D1-氯丙烷与NaOH的乙醇溶液加热反应;1-氯丙烷与NaOH的水溶液加热反应            

答案解析:

下列有关乙炔的说法不正确的是( )A燃烧时有浓厚的黑烟B实验室制乙炔时可用CuSO4除杂质气体C为了减缓电石和水的反应速率,可用饱和食盐水来代替D乙炔的收集方法

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Conventionally a __________ is put in slashes (/ /).AallophoneBphoneCphonemeDmorpheme

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