A~H均为短周期元素,A~F在元素周期表中的相对位置如图1所示,G与其它七种元素

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问题:

A~H均为短周期元素,A~F在元素周期表中的相对位置如图1所示,G与其它七种元素

图1
ABC 
D EF
图2
 

不在同一周期,H是短周期中原子半径最大的主族元素。由B、G构成的最简单化合物常为氮肥工业和纯碱工业的原料。由上述某些元素组成的物质甲~戊的转化关系如图2所示。请回答下列问题:

(1)已知图2中反应①是复分解反应,生成物中水已略去。

a.若戊是含有18电子的双原子分子,则甲的电子式为:_________。实验室制取气体丙的化学方程式为:___________________________。

b.若甲的水溶液呈碱性,丙的凝胶经干燥脱水后,常用做干燥剂,写出甲的一种用途                  

c.若将a和b中甲的饱和溶液混合,会出现白色胶状沉淀,同时伴有刺激性气味的气体产生,则该反应的离子方程式:                            

(2)已知图2中反应①是置换反应,戊是单质,则戊可能是     ,分别写出一个对应的反应①的化学方程式                                                        

考点:无机推断
题型:填空题

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Beginning college is exciting: new ideas to explore, new challenges to be met and many decisions to be made; your future begins here.

      小题1:     Many of us can be easily overwhelmed by the details of running a well-balanced life. While some of us may have the know-how, I guess there are more of us who can benefit from learning about the experiences of others who have walked the college halls before you.

The following you may find of use about life on campus:

● Plan well. There are so many new things to do at a new college or university. Give yourself time to make new friends and became familiar with the campus, but don't forget why you are there.      小题2:    

●Don’t miss the guidelines. The restrictions, rules and regulations of all kinds can usually be found in your student’s handbook.       小题3:       What dates are important? What pieces of paper need to be handed in? What can / can’t you do in your student residence(住处)? Who has the right for what? What do you need to complete to graduate?

     小题4:      And maybe it will better help to write it on a piece of paper and stick it on the telephone, TV and the kitchen table. Consider this — you are paying thousands of dollars for your course. You pay every time you have to repeat or replace a course.

●Build your identity. This is the time for you to decide what to do and what not to do. Take as much time as you need to explore new ideas. Do not be afraid of the beyond.    小题5:   . 

A.If you don't have a "system" for planning your time now (like a daytimer, acomputer data book), get one.

B.Give some time for social activities and manage your time wisely.

C.Write the word "STUDY" on the walls of our bedroom and bathroom.

D.You must keep the word "STUDY" in your mind because you are a student.E. However, you will find college life is different from your previous school environment.

F. This is learning to make good choices.

G. Consider them well-balanced food for thought.

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下图说明

[ ]

A.实行计划生育是我国的一项基本国策

B.实行计划生育的目的是控制人口数量,提高人口素质

C.实行计划生育对于控制人口的过快增长有重要作用

D.实行计划生育有利于经济的发展

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题型:填空题

重10N的木块A静止在斜面上,请在图中画出A受到重力的示意图.

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新中国成立前夕,国民经济全面崩溃。但仅过三年时间,工农业生产就超过历史最高水平。这一历史现象出现的根本前提是( )                                       

A.新中国的成立

B.过渡时期总路线的提出

C.“一五”计划的执行

D.“社会主义三大改造的完成

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改革、深化改革、推动改革、深入推进改革、加快改革、启动改革……《政府工作报告》中提到了77次“改革”,开启了2014年全面深化改革元年的大幕。全面深化改革表明()

①事物是绝对运动和相对静止的统一,改革是社会主义基本矛盾运动的内在要求

②实践是客观性和主观性的统一,改革是人类社会存在和发展的基础

③事物是肯定与否定的统一,改革是社会主义的自我完善和发展

④事物是前进性与曲折性的统一,改革是发展中国特色社会主义的根本动力

A.①②

B.①③

C.②④

D.③④

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