1.综合题- (共1题)
（1）由粮食或各种植物纤维可得到葡萄糖，写出葡萄糖制得乙醇的化学方程式: 。
（2）在常温常压下，1gC2H5OH完全燃烧生成CO2和液态H2O时放出29.71 kJ热量，表示该反应的热化学方程式为 。
（3）下图是一个乙醇燃料电池工作时的示意图，乙池中的两个电极一个是石墨电极，一个是铁电极，工作时M、N两个电极的质量都不减少，请回答下列问题：
①加入乙醇的Pt电极的电极反应式为_________________________。
②在工作过程中，乙池中两电极均收集到标准状况下224mL气体时，甲池中理论上消耗氧气的体积为 mL(标准状况下)；若此时乙池溶液体积为200mL，则乙池中溶液的pH为 。
③若要使②中乙池的溶液完全恢复到起始状态，可向乙池中加入 (填代号)
| A．0.01molCu |
| B．0.01molCuO |
| C．0.01molCu(OH)2 |
| D．0.01molCuCO3 |
E．0.01molCuSO4
F．0.005molCu2(OH)2CO3
2.选择题- (共4题)
A
In class, Peter put up his hand and said to his teacher, "I lost my baby tooth."
"Congratulations," Mrs. Gilbert said. Then she asked the class if anyone had any advice for Peter.
Keiko, a Japanese girl, put up her hand first. "If it is a lower tooth, you should throw it over the roof of your house; if it is an upper tooth, you should put it under the floor. Then your new adult tooth will grow properly."
"You shouldn't throw your baby tooth away, Peter. You should keep it and give it to your mother," said Jack, a French boy.
"Why should I do that?" asked Peter.
"She will make it into a necklace(项链) for you to wear," said Jack.
Jorge, who was from Mexico, had some different advice. "You should take your tooth home and put it under your pillow(枕头) when you go to sleep," Jorge said.
"Why should I do that?" asked Peter.
"Because the tooth fairy(牙仙) will come to keep your tooth and give you good luck. Sometimes she even brings a small toy."
Peter liked Jorge's advice the best. Mrs. Gilbert said to him, "Whatever you decide, you should show your mother your tooth when you et home."
When Peter got home, he showed his mother his tooth and told her his plan. The next morning, Peter woke up and looked under his pillow. The tooth was gone. In its place, he found a dollar and a letter. This is what the letter said:
Dear Peter,
Congratulations! You lost your first tooth. I will keep it forever. You should buy something nice for yourself with this money.
Love,
The Tooth Fairy
用恰当的单词填空完成表格。
College students volunteer in the US | |
In {#blank#}1{#/blank#} | They {#blank#}2{#/blank#}books to the sick people or listen to their problems. |
In old people's homes | They help to clean up or go {#blank#}3{#/blank#}. |
In the {#blank#}4{#/blank#}clubs | They remember the problems of boys and girls |
3.单选题- (共5题)
表示的有机物中，能发生消去反应的共有| A．糖类、蛋白质、油脂都属于天然高分子化合物 |
| B．煤经气化、液化和干馏三个物理变化过程，可变为清洁能源 |
| C．乙醇、过氧化氢、次氯酸钠等消毒液均可以将病毒氧化而达到消毒的目的 |
| D．使用含有氯化钠的融雪剂会加快桥梁的腐蚀 |
| A．离O点越远的元素原子半径越大 |
| B．虚线相连的元素处于同一族 |
| C．最简单氢化物的热稳定性：A>C>D |
| D．A、B两种元素组成的化合物中不可能含有共价键 |
| A．若X为金属单质，Y为非金属固体单质，则Z为O2 |
| B．若X、Y均为金属单质，则甲不可能为黑色固体 |
| C．若X为金属单质，Y为非金属气体单质，则乙可能为黑色固体 |
| D．若X、Y均为非金属固体单质，则Z可能为O2 |
| A．酸性氧化物：CO2，SO2，SiO2，Mn2O7 |
| B．非电解质：乙醇，四氯化碳，氯气，葡萄糖 |
| C．同素异形体：活性炭，C60，石墨，金刚石 |
| D．混合物：铝热剂，纯净矿泉水，水玻璃，漂白粉 |
4.实验题- (共1题)
已知：1.0 mol/L的Fe(NO3)3溶液的pH＝1。
请回答：
（1）装置A中用于添加浓硫酸的仪器名称为__________________。
（2）实验前鼓入N2的目的是________________________________。
（3）装置B中产生了白色沉淀，其成分是________，说明SO2具有________性。
（4）分析B中产生白色沉淀的原因。
观点1：SO2与Fe3＋反应；
观点2：在酸性条件下SO2与NO3-反应；
①若观点1正确，除产生沉淀外，还应观察到的现象是_________________。
②按观点2，装置B中反应的离子方程式是______________________________，
③有人认为，如将装置B中的Fe(NO3)3溶液替换为等体积的下列溶液，在相同条件下进行实验，也可验证观点2是否正确。此时应选择的最佳试剂是(填序号)_____。
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【1】题量占比
综合题:(1道)
选择题:(4道)
单选题:(5道)
实验题:(1道)
-
【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：5
7星难题：0
8星难题：0
9星难题：2