【判断题】【消耗次数:1】
异烟肼加水溶解后,加氨制硝酸银试液,即有黑色浑浊出现。此反应称银镜反应。
正确
错误
参考答案:
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相关题目
【单选题】 下列药物中,哪一个药物加氨制硝酸银能产生银镜反应
①  地西泮
②  阿司匹林
③  莘巴比妥
④  苯佐卡因????
⑤  以上均不对
【单选题】 乙醛的银镜反应中,制备银氨溶液:( )。
①  将氯化钠溶液滴入硝酸银溶液
②  将氨水滴入硝酸银溶液
③  将硝酸铵溶液滴入硝酸银溶液
④  将氯化铵溶液滴入硝酸银溶液
【判断题】 药物中氯化物杂质检查的原理是:利用酸性溶液中杂质与硝酸银试液生成氯化银浑浊。所用的酸是硝酸
①  正确
②  错误
【单选题】 硝酸银受热或者光照时容易分解,因此硝酸银应该保存在()。
①  锥形瓶
②  棕色瓶
③  容量瓶
④  广口瓶
【判断题】 鉴别:乙酰氯,氯乙烷,乙酸酐;具体方法: 用硝酸银进行试验,乙酰氯立即生成氯化银沉淀,氯乙烷后加热才有氯化银沉淀生成,乙酸酐不反应。
①  正确
②  错误
【单选题】 乙醛的银镜反应后,用( )清洗带有银镜的试管。
①  碳酸
②  硝酸
③  硫酸
④  盐酸
【单选题】 向硝酸银溶液中滴入铬酸钾,会得到()。
①  砖红色沉淀
②  淡黄色溶液
③  红棕色沉淀
④  棕黄色溶液
【判断题】 硝酸银标准溶液需保存在棕色瓶中
①  正确
②  错误
【单选题】 关于乙醛的银镜反应中,反应条件是(  )。
①  水浴加热
②  催化剂
③  蒸馏
④  酒精灯加热
【单选题】 丙烯氨氧化制丙烯腈是强放热反应,反应温度较高,工业上大多采用( )反应器。
①  固定床
②  流化床
③  移动床
④  列管式
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【单选题】 But the Swiss discovered long years ago that constant warfare brought them ____suffering and poverty.
①  anything but
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④  no more than
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②  worthily
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④  worthy
【单选题】 Jane tried to ____ the doorman with money, but she failed.
①  bribe
②  corrupt
③  award
④  endow
【单选题】 He packed an ____ shirt in case he had to stay another day.
①  spare
②  unnecessary
③  excessive
④  extra
【单选题】 I was awfully tired when I got home from work, but a half hour nap ____ me.
①  revived
②  released
③  relieved
④  recovered
【单选题】 An institution that properly carries the name university is a more comprehensive and complex institution than any other kind of higher education ____.
①  settlement
②  establishment
③  construction
④  structure
【单选题】 Jane is in a hurry because the train to the airport leaves ______ half an hour.
①  by
②  in
③  for
④  until
【单选题】 She was____ at your saying that.
①  interested
②  troubled
③  annoyed
④  anxious
【单选题】 Lily is upset these days. Do you know how to ______ her ______?
①  cheer; up
②  cheer; on
③  pick; up
④  put; away
【单选题】 I received his mother’ s telephone call at eleven. _____ that he was badly hurt in an accident yesterday.
①  Then did I know
②  Only then I knew
③  Only then did I know
④  Only then knew I