1.计算题- (共1题)

(1)在第②步实验操作中,观察到的一项实验现象是____。
(2)计算原混合物样品中CaCl2的质量____(写出计算过程,结果精确至0.1g)。
(相对原子质量:Ca-40,C-12,O-16,H-1,Cl-35.5)
2.综合题- (共1题)
(1)近年来大气中二氧化碳不断上升的主要原因是____。
(2)自然界中的绿色植物可能通过____作用消耗二氧化碳。
(3)CO2可以灭火,但燃着的镁条却可以在CO2中继续燃烧,生成氧化镁并析出碳的小颗粒,这个变化的化学方程式为____。
(4)科学研究表明,还可通过下列反应将工业尾气中的CO2转化为一种重要的化学原料X。
CO2+4H2→X+2H2O,则X的化学式为____。
(5)下列做法不符合“低碳经济”理念的是(填序号)____;
①改造或淘汰高能耗、高污染产业、②大力发展火力发电、③研制和开发新能源替代传统能源、④优化建筑设计,增强室内采光,减少照明用电。
3.单选题- (共8题)
物质 | A | B | C | C |
反应前质量 | 4 | 6 | 111 | 4 |
反应后质量 | 待测 | 15 | 0 | 84 |
A. A 物质是该反应的催化剂
B. 密闭容器中发生的化学变化属于化合反应
C. 反应后密闭容器中A的质量为 22
A.该反应中,A.B.C.D四种物质的质量比为 22:9:111:80。 |
A.用NaOH溶液治疗胃酸过多症:NaOH+HCl=NaCl+H2O |
B.实验室用稀硫酸与大理石反应制取CO2:H2SO4+CaCO3=CaSO4+CO2↑+H2O |
C.用适量的稀盐酸除去铁表面的锈迹:Fe2O3+6HCl=2FeCl3+3H2O |
D.用点燃的方法除去二氧化碳气体中混有的少量一氧化碳:![]() |
A.铁锈放入稀盐酸中溶液变黄色 |
B.酚酞试液滴入硫酸溶液中变红色 |
C.木炭在氧气中燃烧发出微弱的淡蓝色火焰 |
D.硝酸银溶液中滴加盐酸溶液出现红褐色絮状沉淀 |
A.硫酸洒在实验台上,立即用烧碱溶液冲洗 |
B.实验药液溅入眼睛,立即用水冲洗,切不可用手揉搓 |
C.酒精灯洒出的酒精在桌上燃烧,立即用湿布或沙子扑灭 |
D.浓硫酸沾到皮肤上,立即用大量的水冲洗,再涂上3%-5%的碳酸氢钠溶液 |
A.![]() | B.![]() |
C.![]() | D.![]() |
A.滴入紫色石蕊溶液,颜色变红,则该溶液显酸性 |
B.滴入酚酞溶液,溶液保持无色,则该溶液显酸性 |
C.加入Mg粉,有气泡产生,则该溶液显酸性 |
D.加入CaCO3固体,有气泡产生,则该溶液显酸性 |
4.选择题- (共1题)
The four famous rock stars were due to arrive at any moment and a large crowd of young people had gathered at the airport to welcome them.The police found it difficult to keep the crowd under1after the plane landed and the performers appeared.They smiled and waved2at everybody.Dressed in pink shirts and light blue trousers,and with their long hair and their musical instruments3their shoulders,the four young men looked very much4.
In spite of the large number of policemen5,it was clear that the group would not be able to get to their waiting car6.Word had got out that they had written a new song which would be7when they performed at the grand hall that evening.They were now8with crying of “Play something! Play your new song!”
Even the police looked9when the young men unfolded their instruments and prepared to do one of their numbers as the10for getting out of the airport.The crowd settled down and listened to the first11of the new song. As soon as it was over,there was a great burst of applause and then everyone started12and shouting like crazy. Several young women fainted and had to be carried away by the13unit which was standing by.Greedy for more, the crowd14a repeat performance.Once again the performers gave in,but when the crowd requested still another song,the group cheerfully but firmly15.
Now closely surrounded by the police,they put away their16and stared towards their car which was some distance away.The crowd pushed forward,but the policemen,17arm in arm,prevented anyone from getting through. It took the singers a long time to reach their18.Finally,however,they got in and were just about to drive away when a young woman,who had19to get past the police,jumped onto the roof of the car.She shouted loudly as two policemen20her away and the car began moving slowly through the cheering crowd.
5.填空题- (共7题)
(1)最常用的溶剂____
(2)能够供给呼吸的气体单质____。
(3)常用做干燥剂的一种酸____。
(4)由三种元素组成的化合物可使酚酞试液变红____。
(5)上述酸与碱发生反应的化学方程式:_____。
(1)小丽同学从某一欠收农田里取回一份土壤样品,请你用两种不同的方法帮小丽测出该土壤样品浸出液的酸碱性(只写出所用物品的名称即可):①_____;②_____。
(2)如果检测的结果呈酸性,那么要改良此土壤,应该向农田里施加_____。
(3)请你设计一个实验,能通过清晰可见的现象,除去氯化钙溶液中的少量稀盐酸。你的实验方案是:往溶液中加过量的____(填化学式),将溶液过滤,滤液中就不含有稀盐酸了。
(1)牙膏是____(填纯净物、混合物)。
(2)小远测定自制牙膏及其他清洁用品的 pH,记录如下

自制牙膏显____( 填酸性、碱性、中性), 洁厕灵可使紫色石蕊试液变成____
①石灰石、②氢氧化铝、③氢气、④稀硫酸、⑤氢氧化钠
(1)可用于金属表面除锈的是_____;
(2)用来治疗胃酸过多的是____;
(3)理想的高能燃料是____;
(4)常用作建筑材料的是____。
(1)天然气是城市家庭的主要生活燃料。为防止因天然气泄漏造成危险,可在家中安装报警器, 在甲、乙两图中,安装位置正确的是____。写出天然气燃烧的化学方程式:____

(2)我国自主研发的一种电动汽车使用的能源是新型锂电池,从化学角度看,与使用汽油的汽车相比其优点是(举出一点即可)____。
6.实验题- (共2题)
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【1】题量占比
计算题:(1道)
综合题:(1道)
单选题:(8道)
选择题:(1道)
填空题:(7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:0
5星难题:0
6星难题:3
7星难题:0
8星难题:13
9星难题:3