问题 问答题

如图是探究氯气某性质的实验装置图:

请填写下列空白

(1)该实验的目的是探究氯气还是氯水具有漂白性.

(2)该实验的现象是:A装置中红纸条______,B装置中红纸条______(填“褪色”或“不褪色”)实验结论是:______.

(3)在实验过程中制得氯气通到______中干燥;实验后氯气尾气通入______ 中处理,反应方程式为______.

答案

(2)氯气不具有漂白性,可与水反应:Cl2+H2O⇌H++Cl-+HClO,生成的HClO具有漂白性,可使湿润的有色布条褪色,

故答案为:不褪色;褪色;干燥的氯气不具有漂白性,湿润的氯气具有漂白性;

(3)氯气可用浓硫酸干燥,氯气有毒,不能直接排放到空气中,可用NaOH溶液吸收,发生Cl2+2NaOH=NaCl+NaClO+H2O,

故答案为:浓硫酸;NaOH;Cl2+2NaOH=NaCl+NaClO+H2O.

完形填空
阅读下面的短文,并根据所读内容在文章后表格中的空格里填入最恰当的单词。
注意:每空一词,注意所填的词开头的大小写。
It is interesting to know what people of different nations like to do best.
In France, when a woman enters a cafe or restaurant, she is freely discussed, not only about her appearance but about her past and future as well. She invites looks in the street whether she is beautiful or plain. There is no better way for a woman to get back her self-confidence than a walk in the streets of  Paris or Marseilles, and women really like that.
In Italy, people love talking. They sit about in cafes, exchanging news and discussing politics. They do not hesitate to ask questions about the family, income and private life of anybody who happens to be there.
The Swiss eat as a pastime. Ladies walk into a teashop, eat a couple of ice creams and a large piece of chocolate cake, and then leave, complaining about their weight.
For the Americans, the greatest fondness is said to be the push of buttons. You push a button in the lift, you push a button for cigarette, chewing gums, stamps, even for a life insurance. You can even push a button to get married and another button to get divorced.
In England, waiting in a line is national passion. The English will form a line whether they have the opportunities when the train is practically empty and everybody can have a seat
In different (1)__▲___
What people like to do best
In France
People love to discuss how a woman (2)___▲____, what she did in the past and what she will be in the future.
Women like to (3)___▲___ in the street to get back confidence.
In Italy
People sit in café, (4)___▲___ with each other, and sometimes they even ask about some (5)___▲___ information.
In Swiss
Ladies eat a lot of fatty (6)___▲____ but they often (7)___▲___ having done so.
In the (8)__▲__
It seems that you can do almost everything (9)__▲___ pushing buttons.
In England
The whole nation love to (10)___▲___in a line almost anywhere and anytime.
解答题