【单选题】【消耗次数:1】
下列各组溶剂,按极性大小排列,正确的是
水>丙酮>甲醇
乙醇>醋酸乙脂>乙醚
乙醇>甲醇>醋酸乙脂
丙酮>乙醇>甲醇
苯>乙醚>甲醇
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相关题目
【单选题】 下列各组溶剂,按极性大小排列,正确的是
①  水>丙酮>甲醇
②  乙醇>醋酸乙脂>乙醚
③  乙醇>甲醇>醋酸乙脂
④  丙酮>乙醇>甲醇
⑤  苯>乙醚>甲醇
【多选题】 精制皂苷时,先将粗皂苷溶于甲醇或乙醇,然后加何溶剂可使皂苷析出
①  乙醚
② 
③  正丁醇
④  丙酮
⑤  乙醚-丙酮(1∶1)
【判断题】 植物油、动物油、废餐饮油等原料油与甲醇(或乙醇) 经酯交换反应而得的长链脂肪酸甲(乙)酯。
①  正确
②  错误
【多选题】 下列试剂中能用来作为苯甲醛和苯甲醇鉴别的有( )
①  金属钠
②  托伦试剂
③  希夫试剂
④  卢卡斯试剂
⑤  碘的氢氧化钠溶液
【判断题】 甾体激素中残留溶剂甲醇的检测采用GC法。
①  正确
②  错误
【单选题】 醋酸的合成方法主要有( )和甲醇与一氧化碳低压羰化合成。
①  乙醛催化自氧化
②  乙烯氧化
③  乙烷氧化
④  乙炔氧化
【单选题】 以非极性的物质为固定相、甲醇-水的混合物为流动相,进行吸附柱色谱分离
①  分子量大的组分先流出
②  极性强的组分先流出
③  极性强的组分后流出
④  极性弱的组分先流出
【判断题】 甲醇制烯烃的工艺称作MTO工艺。
①  正确
②  错误
【判断题】 生产甲醇的过程中,空速过高会增加分离设备和换热负荷,但会使甲醇分离效果提高。
①  正确
②  错误
【简答题】 压力对甲醇合成反应是如何影响的?
随机题目
【单选题】 The blizzard continued for a week [] subsequently, they began to run out of food.
①  comma
②  semicolon
【单选题】 I almost spent two hours on this exercise. Find any misplaced modifier in the sentence.
①  two
②  almost
③  on this exercise
【单选题】 Although born and educated in the countryside, Joed like to work [] the big companies are.
①  which
②  when
③  where
④  because
【单选题】 The jury [] discussing the murder case at court.
①  is
②  are
【单选题】 The police []looking for the escaped prisoner.
①  is
②  are
【单选题】 Small sailboats can eaily turn over in the water [] they are not managed carefully.
①  though
②  before
③  until
④  if
【单选题】 [] so many people want to live in cities is because they want to have fun in there.
①  Why
②  That
③  Whether
④  How
【单选题】 Which sentence is correct?
①  Afer finishing her composition, she took up the translation exercise.
②  Afer finishing her composition, the translation exercise was taken up.
【单选题】 Which sentence is correct?
①  Hurrying to the classroom, no one was there.
②  Hurrying to the classroom, she saw nobody there.
【单选题】 Ill visit you whenever I will get the chance. Identify the mistake in the sentence.
①  visit
②  whenever
③  will
④  chance