1.流程题- (共1题)

(1)铁屑生锈的原因是 .
(2)写出过程①中铁锈溶解反应的化学方程式: .
(3)过程②发生化合反应使溶液由黄色变为浅绿色,则该反应的化学方程式是 .
(4)溶液E的溶质一定含有 (填化学式).
(5)除氧化铜粉末外,实验过程所涉及的物质中,一定含有铜元素的有 (填字母序号).
2.计算题- (共1题)
某温度下,向溶质的质量分数为20%的氯化钠溶液47.25g中通入一定量氨气(NH3)和二氧化碳.充分反应后,将溶液中析出的碳酸氢钠晶体过滤,低温烘干,称量,质量为4.4g.计算需要通入氨气的质量.(已知:该温度下碳酸氢钠饱和溶液中,碳酸氢钠与水的质量比为1:9;且溶液中若存在其它溶质,不会对上述比值产生影响).
3.单选题- (共20题)
A.可能有铁粉 | B.一定有炭粉 | C.一定有氧化铜 | D.一定有二氧化锰 |
A.质量守恒定律的微观解释是反应前后原子的种类、数目、质量均不改变 |
B.氧气与臭氧(O3)的化学性质不同,是因为它们是由不同的分子构成的 |
C.气体可压缩储存于钢瓶中,是因为分子之间有间隔 |
D.湿衣服变干是因为水分子分解了 |
A.废弃的生石灰会带来“白色污染” |
B.羊毛、棉花、蚕丝均属于天然纤维 |
C.二氧化硫和二氧化碳是造成酸雨的主要物质 |
D.缺碘会导致甲状腺肿大,因此应大量摄入碘元素 |
A.分离铜粉和碳粉:滴加稀硫酸 |
B.除去氯化钠中的氢氧化钠:滴加适量盐酸 |
C.除去氧气中的一氧化碳:通过灼热的氧化铜粉末 |
D.除去二氧化碳中的水蒸气:通过碱石灰(主要成分为NaOH和CaO) |

A.50℃时A、B、C三种物质的溶解度由大到小的顺序是A>B>C |
B.50℃时,把50 g A放入50 g水中能得到A的饱和溶液,其中溶质与溶液质量比为1:3 |
C.将50℃时A、B、C三种物质的饱和溶液降温度20℃时,这三种溶液的溶质质量分数的大小关系是B>C=A |
D.将C的饱和溶液变为不饱和溶液,可采用降温的方法 |
A.氢氧化铝的化学性质稳定 |
B.复方胃舒平可用于治疗胃酸过多症 |
C.氢氧化铝可灭火的原因之一是降低了可燃物的温度 |
D.实验室不用NaOH溶液制备Al(OH)3,因为NaOH会与Al(OH)3反应 |
| A | B | C | D |
操作 | 分别向相同质量的镁粉、铁粉、锌粉中加入等浓度稀硫酸 | 一定温度下,向氢氧化钙溶液中加入氧 化钙固体 | 向变质的氢氧化钠溶液中滴加稀盐酸 | 将一定量硝酸银溶液中加入铜粉 |
图象 | ![]() | ![]() | ![]() | ![]() |
结论 | 三种金属与硫酸反应的剧烈程度:Mg>Zn>Fe | 该氢氧化钙溶液已经饱和 | 氢氧化钠溶液已经全部变质 | 铜与硝酸银发生了化学反应 |
A.A | B.B | C.C | D.D |
4.选择题- (共15题)
读书的意义 | 1). 获取知识,开阔视野;2). 使人愉悦,有益学习;3). …… |
书的种类 | 历史书, …… |
现 状 | 花时少,原因:1). 作业多 2). 无良好的读书习惯 3). 电视和网络占时多 |
倡 议 | ……(至少两点) |
要求:1)、要点完整,可适当发挥,使句子通顺、连贯。
2)、正确使用时态,语法正确,不要逐字翻译,书写整洁。
3)、80词左右,开头结尾已给出,不计入总词数。
4)、文中不得出现真实的校名、人名。
Dear friends,
Reading is very important in our daily life.
Let's start reading now!
C
Kevin and his family had a holiday to his hometown—a very beautiful island. It was a great trip.
They all wanted this trip. Kevin's parents wanted to go out into nature after a long time of work. Kevin needed to take a good rest before the exam. Kevin's brother Jim is in the first grade, so he doesn't have a voice in family things. He was just happy that they were going outside.
The sea was blue. They went boating in the sea. It was so cool. There was no Internet, so they spent the whole time together. They stayed in a small wooden house by the sea. Mom and Kevin cooked delicious sea food. Jim ran after chickens and ducks, and gave them food. When he became tired, he sat next to his dad and helped him fish. He even helped to hook two fish!
It is always good to spend time with families. They liked this trip!
C
Kevin and his family had a holiday to his hometown—a very beautiful island. It was a great trip.
They all wanted this trip. Kevin's parents wanted to go out into nature after a long time of work. Kevin needed to take a good rest before the exam. Kevin's brother Jim is in the first grade, so he doesn't have a voice in family things. He was just happy that they were going outside.
The sea was blue. They went boating in the sea. It was so cool. There was no Internet, so they spent the whole time together. They stayed in a small wooden house by the sea. Mom and Kevin cooked delicious sea food. Jim ran after chickens and ducks, and gave them food. When he became tired, he sat next to his dad and helped him fish. He even helped to hook two fish!
It is always good to spend time with families. They liked this trip!
英军统帅盖奇1774年给伦敦的报告中惊呼:“遍及整个美洲大陆的激情把所有的人联合在一种共同的事业中……全体人民达到这样的狂热程度,以致准备进行疯狂的尝试。”报告中“共同的事业”是指( )
5.填空题- (共1题)
温度/℃ | 0 | 10 | 20 | 30 | 40 | 50 | 60 |
溶解度/g | 13.3 | 20.9 | 31.6 | 45.8 | 63.9 | 85.5 | 110 |
某兴趣小组做了以下实验:

(1)上述溶液中的溶剂是_____,上述实验过程中得到的溶液一定属于不饱和溶液的是____(填数字序号),⑤所对应的实验现象是____________________.
(2)实验过程中,溶质的质量分数一定相等的是_______(填数字序号).
(3)为了防止水体污染,小组同学提出了如下方案处理实验后的废液:
步骤I:将⑤继续冷却至0℃,过滤,共可回收得到KNO3固体_______g.
步骤II:向滤液中加入_______g水稀释,得到溶质的质量分数为1%的KNO3稀溶液,将此溶液做为花肥使用.
6.实验题- (共2题)

(1)实验仪器a的名称是 .
(2)实验室用装置A制取氧气时,所需药品是 ;收集完氧气时,应进行的操作是 .
(3)实验室用装置B和 (填字母序号)制取二氧化碳时,反应的化学方程式为 .
(4)用排空气法收集一瓶氧气,验满时将带火星的木条放在瓶口,若观察到 ,说明瓶中已充满氧气.
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【1】题量占比
流程题:(1道)
计算题:(1道)
单选题:(20道)
选择题:(15道)
填空题:(1道)
实验题:(2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:3
5星难题:0
6星难题:12
7星难题:0
8星难题:7
9星难题:3