2016届湖南省湘西州凤凰县九年级上期末化学试卷

适用年级:初三
试卷号:305913

试卷类型:期末
试卷考试时间:2016/8/11

1.简答题(共2题)

1.
火善用之为福,不善用之为祸.常用的灭火方法有:①熄灭液化气灶火焰时,关闭阀门;②油锅着火时,用锅盖盖灭.
(1)从灭火原理角度进行分类,①与②的灭火原理各是什么?
(2)请举一例把“温度降低到着火点以下”的灭火方法?
2.
据报道,近年来,我国很多城市的雾霾越来越严重.请你给出两点建议,减少雾霾污染.

2.单选题(共6题)

3.
下列现象属于化学变化的是( )
A.自行车车胎受热爆炸
B.铁生锈
C.蜡烛融化
D.海水蒸发
4.
能保持二氧化碳化学性质的微粒是()
A.碳原子和氧原子
B.碳原子和氧分子
C.二氧化碳分子
D.不能确定
5.
下列物质中氯元素的元素化合价最高的是( )
A.HClO2B.Cl2C.HClD.HClO3
6.
下列叙述不正确的是(  )
A.催化剂在化学反应中不能增加生成物的质量
B.电解水实验中正极和负极产生的两种气体质量比1:2
C.用肥皂水可以区别硬水和软水
D.点燃或加热可燃性气体前,检验其纯度
7.
下列实验操作正确的是
A.闻气体气味B.检查气密性C.点燃酒精灯D.取用块状固体
8.
在三个集气瓶中分别盛有空气、二氧化碳和氧气.将燃着的木条依次插入各瓶中,观到的现象分别是继续燃烧、火焰熄灭、燃烧更旺.则三瓶气体依次是( )
A.空气、二氧化碳、氧气
B.氧气、空气、二氧化碳
C.二氧化碳、空气、氧气
D.空气、氧气、二氧化碳

3.选择题(共1题)

9.

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。

The benefits of keeping a journal(日志)

    If you want to grow, one important thing you should do is keep a journal. It may seem simple, but it can make a big difference in your life. I have been keeping journals for years. Writing all the lessons I learn and all the ideas I get has become a habit for me. {#blank#}1{#/blank#} Here are some benefits you will get by keeping a journal.

♦ It prevents you from losing an idea. Have you ever gotten an idea and lost it later because you didn't write it down? {#blank#}2{#/blank#} But then I developed the habit of writing down every idea that came into my mind as soon as possible. If I am away from my computer, I usually write it down on a piece of paper that I bring wherever I go. I will then transfer the idea to the journal in my computer.

♦ It helps you review all the lessons you've learned. By reviewing your journal, you can quickly see the lessons you've learned and the ideas you've gotten. {#blank#}3{#/blank#} You can use the ideas to propel yourself forward.

♦ {#blank#}4{#/blank#} After keeping a journal for years, you can look back at it and see how far you've gone. Things that were big problems in the past might seem small today. The raw ideas you had in the past have been realized today.

♦ It helps you expand your ideas. When you try to come up with a sentence to express an idea, you are thinking actively about it. {#blank#}5{#/blank#} In the end, you will expand your ideas.

A.I often experienced that myself.

B.It trains you to express your thoughts.

C.It allows you to see your progress over time.

D.Just use whatever tool you feel comfortable with.

E.Thinking actively helps you connect your idea to another idea.

F.And to be honest, I can't imagine what my life would be like without it.

G.Then you can do whatever necessary to avoid repeating the same mistakes.

4.填空题(共6题)

10.
如图中A、B、C、D是四种粒子的结构示意图,E是银元素在元素周期表中的信息.

请回答下列问题:
(1)图中A、B、C、D粒子共表示_____种元素.
(2)A、B、C中表示阳离子的是_____.
(3)若D为原子结构示意图,则D中x=_____.
(4)E中银元素原子的质子数为_____.
11.
用化学符号表示:
(1)2个氧原子    
(2)负2价的硫元素   
(3)天然气(或沼气)的主要成分    
12.
尿素是含氮量最高的氮肥,化学式为:CO(NH22,请问尿素中氮元素的质量分数为
可能需要的相对原子质量:C﹣12  H﹣1  O﹣16  N﹣14.
13.
我们身边常见的一些气体,在生活中有着不同的用途.请结合我们学过的化学知识选择填空.(填字母)
A.二氧化碳B.氢气 
C.一氧化碳D.氧气
E、氮气   F、稀有气体
(1)理想的清洁﹑高能燃料是
(2)用来抢救病人的气体是
(3)冬天在密闭的房间用木炭烤火会引起中毒的是
14.
如图标志中

(1)提醒人们注意节约用水的是(填字母)
(2)①净水时加活性炭是利用其具有 ;生活中,可通过 的方法来将硬水软化,
②做细铁丝在氧气中燃烧的实验时,需先在集气瓶底放少量水(或一层细砂)的作用是
15.
实验室常用到如图仪器.请回答:

(1)写出仪器名称:a
(2)用过氧化氢溶液和二氧化锰制取氧气时,所选用的发生装置是 (填序号),其反应的化学方程式是  
(3)小明要制取少量CO2,其反应原理是 (用化学方程式表示),他制取该气体的收集装置是(填装置序号)

5.实验题(共1题)

16.
如图是一种可用于集气、洗气等的多功能装置

(1)收集气体;将装置内装满水,再连接量筒,就可以用于测定不溶于水且不与水反应的气体体积,则气体应从 (填“m”或“n”)进入瓶中.
(2)若用于检验气体:如检验气体是否为二氧化碳:
假设一:该气体为二氧化碳
假设二:该气体不是二氧化碳请你仿照(1)设计实验方案进行探究(简要写出实验步骤和现象,得出结论)
试卷分析
  • 【1】题量占比

    简答题:(2道)

    单选题:(6道)

    选择题:(1道)

    填空题:(6道)

    实验题:(1道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:1

    5星难题:0

    6星难题:11

    7星难题:0

    8星难题:2

    9星难题:1