1.科学探究题- (共2题)
已知信息:Ⅰ.木炭与氧化铜反应除生成铜外还可能生成氧化亚铜(Cu2O);
Ⅱ.Cu和Cu2O均为不溶于水的固体;
Ⅲ.Cu2O+H2SO4=CuSO4+Cu+H2O
提出问题:红色固体含有什么物质?
(1)猜想假设:猜想一:红色固体只含Cu;猜想二:红色固体只含Cu2O;猜想三:______(请补充完成猜想三)。
(2)实验探究:(填写表中空格)
实验操作 | 实验现象 | 实验结论 |
a.取少量红色固体加入到足量硫酸溶液中 | 无明显现象 | 假设 ______ 成立 |
b.取少量红色固体加入到足量硫酸溶液中 | ______ | 假设二和假设三均有可能成立 |
(3)试管B中看到的现象是:______,反应的化学方程式:______。

(提出问题)锌与硫酸反应的快慢受哪些因素的影响呢?
(猜想与假设)a.可能与硫酸的质量分数有关;b.可能与锌的形状有关。
(设计并实验)小兵用不同质量分数的硫酸和不同形状的锌进行如下实验。
实验编号 | 硫酸的质量分数(均取20mL) | 锌的形状(均取1g) | 氢气的体积(mL) |
① | 20% | 锌粒 | 31.7 |
② | 20% | 锌片 | 50.9 |
③ | 30% | 锌粒 | 61.7 |
④ | 30% | 锌片 | 79.9 |
(1)写出稀硫酸与锌反应的化学方程式______。
(2)小兵用如图装置收集并测量氢气的体积,其中量筒的作用是______,氢气应从______(填e或f或g)管通入。

(收集证据)
(3)要比较不同质量分数的硫酸对反应快慢的影响,应选择的实验编号是______。
(得出结论)
(4)结论是______。
(评价与反思)
(5)下表是小兵第①组实验的详细数据。
时段 | 第1分钟 | 第2分钟 | 第3分钟 | 第4分钟 | 第5分钟 | 第6分钟 |
H2的体积 | 3.1mL | 16.7mL | 11.9mL | 9.6mL | 7.6mL | 6.0mL |
请描述锌与硫酸反应的快慢的变化并解释原因______。
(6)锌与硫酸反应的快慢可能还受哪些因素影响______?设计实验验证______。
2.计算题- (共1题)
3.单选题- (共8题)

A.该反应有2种生成物 |
B.每个生成物分子由3个原子构成 |
C.参加反应的各物质的分子个数比是2:1 |
D.该反应是化合反应 |
A.地球上的水和月球上的水冰的化学性质不同 | B.水冰是一种混合物 |
C.水冰由氢、氧元素组成 | D.水冰中的分子有的运动,有的不运动 |
A.由C、H、N三种元素组成 |
B.燃烧产物只有CO2和H2O |
C.不属于氧化物 |
D.分子中C、H、N原子个数比是9∶13∶1 |
A. -3 B. 0 C. +1 D. +3
A.“碳纳米泡沫”在氧气中完全燃烧的产物是二氧化碳 |
B.“碳纳米泡沫”是一种单质 |
C.“碳纳米泡沫”和金刚石的性质相同 |
D.“碳纳米泡沫”在一定条件下可还原氧化铜 |
4.选择题- (共2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。
How to communicate effectively
Effective communication is a must for everyone who hopes to be successful. It helps express your thoughts and improves your career prospects (前景) as well as strengthens relationships. Therefore, it's necessary to work hard to improve your communication skills.
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Before you are ready to talk to a group of people, you should think about what you are going to talk about. Although a printed copy of a speech may not be always necessary, highlighting a few important issues in your mind is a must. {#blank#}2{#/blank#} And it reduces the possibilities of getting away from the main issues.
Choose your words
Choice of words is the most important part of any communication. Simple, clear words are appropriate for the issue you are discussing. Needless to say, words that could make your audience unpleasant are best kept out of the communication. Most people tend to be careful about their language while at work. {#blank#}3{#/blank#} This may hurt your loved ones beyond your imagination.
Body language
Many people use body language by mistake and end up making a fool of themselves. Body language means keeping eye contact and using hand gestures only wherever required. {#blank#}4{#/blank#} This will make your talk more of a stage performance and defeat its purpose.
Listen and concentrate
Communication is an exchange of ideas. Once you are done with your part, listen carefully to what other people plan to say. {#blank#}5{#/blank#} Get rid of all distractions (分散注意力的事物) such as a phone before you begin communication. A distraction not only disturbs your focus, but it also causes your audience's attention to wander.
A. Gather your thoughts B. Prepare a copy of a speech C. However, when they get home they often use colorful language. D. This will help you remain focused throughout your communication. E. If you are giving a speech, it is important that you focus on that activity only. F. Effective communication is a gradual process and requires efforts on your part. G. Remember, there is no need to speak every word with a gesture or facial expression. |
5.填空题- (共2题)
司机驾车前饮用的饮料中,不能含有的是__;厨房调味品中可以使紫色石蕊试液变红的是____;属于未来新型能源的是____;可以用作制冷剂的是____;写字用的铅笔中含____;可用于刻划玻璃的是____。
(1)请你写出甲烷完全燃烧的化学方程式:__________________________________。
(2)煤矿瓦斯爆炸有两个必要条件:
①瓦斯含量在爆炸极限的范围内;②________________________________________。
(3)下表是常见三种气体的爆炸极限,请你据此判断:
最容易发生爆炸的气体是____。
可燃气体 | 爆炸极限(体积分数) |
H2 | 4.0%~74.2% |
CH4 | 5%~15% |
CO | 12.5%~74.2% |
(4)下列图标中,与燃烧和爆炸无关的是

A B C D
(5)某现代化的矿井采用了“低浓度瓦斯发电技术”,有效解决了矿区及周边地区的照明用电。这种既采煤又发电联合生产的优点是___________________________________。
6.实验题- (共1题)
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【1】题量占比
科学探究题:(2道)
计算题:(1道)
单选题:(8道)
选择题:(2道)
填空题:(2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:1
5星难题:0
6星难题:7
7星难题:0
8星难题:6
9星难题:0