问题 填空题

在下列各变化中,反应①为常温下的反应,A、C、D均含氯元素,且A中氯元素的化合价介于C与D之间,E常温下为无色无味的液体,F为淡黄色粉末,G为常见的无色气体。

回答下列问题:

(1)A、G的化学式分别为___     、___  

(2)A和E反应的化学方程式为__            

(3)写出反应①的化学方程式_____________。

(4)在反应②中,每生成2.24 L气体G(标准状况)时,消耗F _      ___g。

答案

(1)  Cl2  O2(2)Cl2+H2OHCl+HClO (3.)Cl2+2NaOH=NaCl+NaClO+H2O (4)15.6

题目分析:由图中关系可推知:A:Cl2;B:NaOH;C:NaCl;D:NaClO;E:H2O;F:Na2O2;G:O2。(1)A、G的化学式分别为Cl2 、 O2。(2)A和E反应的化学方程式为Cl2+H2OHCl+HCO。(3)A和B反应的方程式为:Cl2+2NaOH=NaCl+NaClO+H2O。(4)在反应2Na2O2+2 H2O= 4NaOH+ O2↑中,每产生标准状况下的氧气22.4L,消耗的Na2O22mol.即156g.现在产生了2.24 L气体G(标准状况),则消耗Na2O2质量为15.6g.

填空题

语言基础知识(共25小题,每题1分,计25分)

A)根据括号中所给的汉语写出单词,使句子的意思完整正确

小题1: All the children should receive basic ____________ (教育).

小题2: We often see the public sign “No ____________ (吸烟).”

小题3: Don’t ____________ (触摸) the animals. They are very dangerous.

小题4:You will be ______________ (惩罚) if you are found copying others’ homework.

小题5: At last the charity show was very _____________ (成功).

B) 请根据句意用所给单词的适当形式填空。

小题6:He can speak many foreign languages, ___________ (include) Russian.

小题7:Too much drinking is ____________ (harm) to the health.

小题8: Children should be taught to spend their free time ____________ (wise).

小题9: Last year the river near my home _____________ (pollute) by rubbish.

小题10: The old woman has got used to ____________ (live) a simple life.

小题11:Dr. Black felt tired because he had two ____________ (operate) yesterday.

小题12: They should go to school instead of ____________ (work) to support their family.

小题13:The parents want their children to be         (health).

小题14: They raise money by ____________ (sell) Christmas cards.

小题15:It’s impossible for us ____________ (finish) the work in an hour.

C)根据对话内容,从下面方框中选择适当的词或词组填空,使对话内容完整正确。

A: Our school is going to 小题16:   a charity show next weekend.

B: Really? Who will you raise money for?

A: For girls in the west of China.

B: Are you going to invite some local 小题17:   ?

A: Yes. We will  小题18:   invite some leaders from the government.

B: That’s great. They will give you   小题19:    support.

A: Yes. And I think everyone in our school should   小题20:    the show.

B: You’re right. It’s meaningful to help the girls return to school.

小题21: ________小题22: ________ 小题23:__________小题24: ________小题25:____________

D) 句型转换

小题26: The desk is very heavy. The little boy can’t carry it. (合并成一句)

The desk is _______ heavy for the little boy ________ carry.

小题27:It’s meaningful. We help the blind people see again. (合并成一句)

It’s meaningful for us _______  _______ the blind people see again.

小题28: My aunt gave me a teddy bear for my birthday.  (改为被动语态)

A teddy bear                   to me for my birthday by my aunt.

小题29: They will build a new school in the town center next year. (改为被动语态)

A new school will __________  __________ in the town center next year.

小题30: He has been a League member for 2 years. (对画线部分提问)

________   _________ has he been a League member?

单项选择题