2012届北京市朝阳区九年级上学期期末考试化学试卷

1.

媒体近日报道：某些方便面遭到增塑剂（化学式为C₁₀H₁₀O₄）污染，长期摄入增塑剂可引起血液系统、生殖系统损害。计算：
（1）增塑剂的相对分子质量；
（2）增塑剂中碳、氢元素的质量比；
（3）增塑剂中氧元素的质量分数（写出计算过程）。

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2.

金属钛（Ti）可由TiO₂与Si高温制得，化学方程式为 TiO₂+Si

SiO₂+Ti，该反应属于
A. 化合反应 B. 分解反应
C. 置换反应 D. 有金属单质参加的反应

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3.

下列物质中，属于氧化物的是（　　）

A．NaCl

B．MnO₂

C．NaOH

D．H₂SO₄

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4.

下列关于乙酰水杨酸（C₉H₈O₄）的说法正确的是
A. 属于氧化物 B. 由21个原子构成
C. 氧元素的质量分数最小 D. 由碳、氢、氧三种元素组成

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5.

核能的合理利用一直是国际关注热点．已知某种核原料的原子核内含有1个质子和2个中子．下列关于该原子的说法正确的是( )
A. 核电荷数为3 B. 电子总数为2
C. 属于氢元素 D. 相对原子质量为1

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6.

根据四位同学的讨论，判断该物质是(　　)

A. CH₄ B. CO C. C₂H₅OH D. H₂

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7.

下列关于物质的性质和用途说法不正确的是

A．氧气用于火箭发射，是利用氧气的可燃性

B．氮气用于食品防腐，是利用氮气常温下化学性质稳定

C．二氧化碳用于灭火，是利用它的物理性质和化学性质

D．稀有气体充入霓虹灯，是利用稀有气体通电能发出不同颜色的光

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8.

2011年世界环境日的主题是““Forests:Nature at Your Service”--森林：大自然为您效劳”。下列认识不合理的是

A．植树造林，严禁乱砍滥伐

B．开发新能源，禁止开采和使用化石燃料

C．提倡乘坐公交车、骑自行车或步行的出行方式

D．在生产和生活中提倡使用节能技术和节能用具

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9.

在实验中，不慎将酒精灯碰倒洒出的酒精着火时，最简便的扑灭方法是（　　）

A．用树枝扑打

B．用灭火器扑灭

C．用高压水喷浇

D．用湿抹布盖灭

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10.根据短文内容，选择正确的答案。

B

In your life, there are a lot of people around you. They are your relatives, neighbors, friends or classmates. Sometimes you get along well with them, but sometimes don't. What can you do when someone hurts you? Most people may be angry or even fight with him. But it's not a good idea. You'd better forget all this and forgive (宽恕) him.

Maybe it's not easy for you to do that, but it's possible. Please remember: Keep a good mood, and you will keep healthy. Staying angry with others, in fact, means letting others' mistakes treat yourself unfairly.

How can you forgive others?

First, think of something pleasant and try to get yourself happy.

Second, don't wait others to say sorry to you. If anyone hurts you, he won't say sorry to you. He may just want to hurt you or just don't see things the same way.

Third, try to see things in others' shoes. You can understand their minds better and make yourself a little happier.

At last, try to know yourself very well. Whose mistakes caused that, yours or others'? If it's your fault (错误), try to say sorry to them. If it isn't, smile at the thing.

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11.根据短文内容，选择正确的答案。

B

In your life, there are a lot of people around you. They are your relatives, neighbors, friends or classmates. Sometimes you get along well with them, but sometimes don't. What can you do when someone hurts you? Most people may be angry or even fight with him. But it's not a good idea. You'd better forget all this and forgive (宽恕) him.

Maybe it's not easy for you to do that, but it's possible. Please remember: Keep a good mood, and you will keep healthy. Staying angry with others, in fact, means letting others' mistakes treat yourself unfairly.

How can you forgive others?

First, think of something pleasant and try to get yourself happy.

Second, don't wait others to say sorry to you. If anyone hurts you, he won't say sorry to you. He may just want to hurt you or just don't see things the same way.

Third, try to see things in others' shoes. You can understand their minds better and make yourself a little happier.

At last, try to know yourself very well. Whose mistakes caused that, yours or others'? If it's your fault (错误), try to say sorry to them. If it isn't, smile at the thing.

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12.

把 1，2，3，…，9填在如图的9个圆圈里，然后将任意两个相邻的数相加，得到一些和，要使这些和都不超过整数n，n至少是多少？

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13.

实验室制取气体所需的装置如图所示．

请回答以下问题．
（1）写出标号仪器的名称：a______．
（2）用过氧化氢溶液和二氧化锰制取氧气的化学方程式为______．用高锰酸钾制取氧气时，所选用的发生装置为______（填字母）．
（3）用大理石和稀盐酸制取二氧化碳的化学方程式为______．用装置______（填字母）收集一瓶二氧化碳，将燃着的木条接近瓶口，若观察到______，说明瓶中已充满二氧化碳．
（4）炼铁的原理是利用一氧化碳与氧化铁反应．在实验室里，可用右图所示装置进行实验，该实验还可得出有关一氧化碳的相关化学性质是（用化学方程式表示）______．

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2012届北京市朝阳区九年级上学期期末考试化学试卷

1.计算题(共1题)

2.单选题(共8题)

3.选择题(共3题)

4.填空题(共1题)

【1】题量占比

【2】：难度分析