1.单选题- (共19题)
A.水结冰前后,质量保持不变 |
B.36g水通电完全分解,可得到2g的氢气 |
C.l00g过氧化氢溶液中,含有30g过氧化氢和70g水 |
D.1.2g碳与3.2g氧气反应可生成4.4g二氧化碳 |

A.反应前后元素种类不变 | B.该反应的生成物都是单质 |
C.该反应前后分子个数相等 | D.该反应发生所需要的条件是通电 |

A.此反应有单质生成 |
B.原子在化学变化中是不可分的 |
C.图中生成物全部是化合物 |
D.参加反应的两种分子的个数比为1∶1 |
A.分子是保持物质性质的一种粒子 |
B.物体有热胀冷缩现象,主要是因为物体中的粒子大小随温度的改变而改变 |
C.分子、原子、离子都可以直接构成物质 |
D.在化学反应中,任何离子都不能再分 |
A.3H--表示三个氢原子 |
B.3H2O--表示三个水分子 |
C.Al3+--表示铝元素的化合价为+3 |
D.SO3--表示一个三氧化硫分子中含有三个氧原子 |
A.一个C24H38O4分子中含有2个O2 |
B.一个C24H38O4分子中含有66个原子 |
C.邻苯二甲酸二辛酯中碳氧元素质量比为6:1 |
D.邻苯二甲酸二辛酯属于氧化物 |
A.因为磷燃烧能产生白烟,所以可用于制作烟幕弹 |
B.因为石墨具有良好的导电性,所以被用来制作干电池的电极 |
C.因为氮气化学性质不活泼,所以可用于食品包装袋内防腐 |
D.因为氧气能支持燃烧,所以可用作燃料 |

A.该实验证明空气中氧气的体积分数约占![]() |
B.实验时红磷一定要过量 |
C.实验前一定要检查装置的气密性 |
D.红磷燃烧产生大量的白雾,火焰熄灭后立刻打开弹簧夹 |
A.①②⑥ | B.①③⑥ | C.②③⑤ | D.①②⑤ |
A.若电脑着火,立即用水浇 |
B.室内起火立即打开所有的门窗 |
C.炒菜时油锅不慎着火,迅速盖上锅盖 |
D.夜晚发现液化气泄漏,立即开灯检查 |
2.选择题- (共6题)
张柏楠,“神舟飞船”系列的总设计师。他在中国的航天史上留下了许多第一:第一枚导弹、第一枚火箭、第一颗卫星、第一艘试验飞船……他让“神舟五号”完成了首次载人飞行,他使中国航天事业取得了历史性的突破。这说明( )
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.
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.
3.填空题- (共5题)
A.反应前后分子种类变化的微观示意图如图所示。 |

(1)一个A分子中共含有______个原子,B代表的是______(填化学式)。
(2)四种物质中,属于单质的是______(填图中的字母)。
(3)在该反应中,以下叙述正确的是______。
a.属于化合反应 b.原子种类没有改变
c,分子的个数没有改变 d.A物质中氢元素的质量分数为25%
(4)在该反应中,生成C和D的质量比为______。
(1)干冰______;
(2)最轻的气体______;
(3)2个氯离子______;
(4)保持水化学性质的最小粒子______;
(5)8个二氧化硫分子______;
(6)3个硫酸根离子______。

(1)如图为元素周期表中的一格,下列说法不正确的是______.
A.碳元素属于非金属元素
B.碳原子核内质子数为6
C.碳元素的原子结构示意图为

D.碳的相对原子质量为12.01
(2)“低碳生活”倡导低能耗、低污染、低排放,主要是为了减少______(填化学式)的排放量.下列做法符合“低碳经济”的是______.
①提倡发送电子贺卡②大力发展火力发电 ③研制和开发新能源④提倡使用一次性木筷 ⑤增强室内自然采光
(3)二氧化碳和氨气(NH3)在高温、高压下反应,生成尿素[CO(NH2)2]和水,反应的化学方程式是______.
①氧气②活性炭③肥皂水④金刚石 ⑤氮气
请选择合适物质的序号填空:
(1)常用于冰箱除异味的物质是______;
(2)当人出现高原反应时应立即吸入的气体是______;
(3)可用作装饰品的是______;
(4)可用于区别硬水和软水的是______;
(5)充入食品包装袋中可以防腐的气体单质是______。

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)______.

4.实验题- (共1题)
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【1】题量占比
单选题:(19道)
选择题:(6道)
填空题:(5道)
实验题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:11
7星难题:0
8星难题:9
9星难题:5