【单选题】【消耗次数:1】
实验测出,分子的偶极矩u0,则该分子是( )。
金属分子
非极性分子
离子
极性分子
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相关题目
【单选题】 实验测出,分子的偶极矩u= 0,则该分子是( )。
①  极性分子
②  非极性分子
③  金属分子
④  离子
【单选题】 下列分子属于非极性分子的是
①  NH3
②  H2S
③  CH4
④  CO
【判断题】 分子中键的极性越强,分子的极性也越强。
①  正确
②  错误
【判断题】 含有极性键的分子一定是极性分子!
①  正确
②  错误
【判断题】 甲烷和四氯化碳是对称分子,各键矩向量和为零,故为非极性分子。氯甲烷分子中C-Cl键矩未被抵消,μ=1.94D,为极性分子。 所以,键的极性和分子的极性是不相同的。
①  正确
②  错误
【单选题】 下列分子中,键和分子均具有极性的是
①  Cl2
②  BF3
③  CO2
④  NH3
【多选题】 下列物质中,含有极性键的非极性分子是()
①  A.CCl4
②  B.BCl3
③  C.H2O
④  D.NCl3
⑤  E.OF2
【判断题】 色散力仅存在于非极性分子之间
①  正确
②  错误
【判断题】 极性分子一定含有极性键!
①  正确
②  错误
【单选题】 如果分子中正负电荷的重心是重合的,则这种分子称为( )。
①  离子
②  极性分子
③  金属分子
④  非极性分子
随机题目
【单选题】 By the end of last month, she ____ over five hundred letters of congratulation from different parts of the world.
①  would received
②  has received
③  had received
④  receive
【单选题】 Mr. Downham asked the public their views on the two subjects currently ____ discussion.
①  with
②  at
③  to
④  under
【单选题】 People just say it out of politeness and they don’t really ____ it. ?
①  realize ?
②  mean ?
③  think ?
④  regard?
【单选题】 —Don’t forget to come to my birthday party tomorrow.—I ____ .
①  don’t
②  won’t
③  can’t
④  haven’t
【单选题】 Fortunately, Jack was only slightly injured in the traffic ____ .
①  incident
②  event
③  case
④  accident
【单选题】 I want to paint the wall, but I can’t ____ on the color. ?
①  design ?
②  decide ?
③  desire ?
④  detect?
【单选题】 The book I ____ the other day can be found nowhere.
①  borrow
②  borrowed
③  are borrowing
④  was borrowing
【单选题】 Her parents objected to ____ that farmer, though he has a lot of money.?
①  her marrying ?
②  marrying ?
③  marry ?
④  her marrying with?
【单选题】 Tom, what did you do with my documents? I have never seen such a____ and disorder!
①  mass
②  mess
③  guess
④  bus
【单选题】 —Could I borrow your dictionary? —I’d get it for you ____I could remember who last borrowed it.
①  except that
②  unless
③  only if
④  if only