1.单选题- (共5题)

A.A为电源正极 |
B.在Pt电极上发生氧化反应 |
C.阴极电极反应式为2NO3-+6H2O+10e-=N2+12OH‑ |
D.质子从Pt电极移向Ag-Pt电极 |

A.电解过程中每转移12 mol电子,会产生2 molO2 |
B.加入助熔剂冰晶石(Na3AIF6)可降低电解的温度 |
C.电解过程中阳极反应式4A13++12e-→4Al |
D.若用该装置电解氯化铝溶液也能得到金属铝 |
A.在生产生活中比较普遍而且危害较大的是金属的化学腐蚀 |
B.当镀锡铁制品的镀层破损时,镀层仍能对铁制品起保护作用 |
C.在海轮外壳连接锌块保护外壳不受腐蚀是采用了牺牲阳极的阴极保护法 |
D.可将地下输油钢管与外加直流电源的正极相连以保护它不受腐蚀 |
A.充分利用太阳能 |
B.因地制宜开发利用风能、水能、地热能、潮汐能 |
C.合理、安全开发利用氢能、核能 |
D.能源都是通过化学反应获得的 |
2.选择题- (共2题)
增加:在缺词处加一个漏字符号 (∧) ,并在其下面写出该加的词。
删除:把多余的词用斜线 (\) 划掉。
修改:在错的词下画一横线,并在该词下面写出修改后的词。
注意:1). 每处错误及其修改均仅限一词。
2). 只允许修改10处,多者 (从第11处起) 不计分。
My father is engineer. Although he is in Africa most time of the year and there isn't much time for him to reunite with the family, but we are all proud in him. He builds railways there. It is an importance part of the great Belt and Road Project. At first people there found the Chinese and their work strangely. My father often saw people running after trains out of curious. People there even didn't understand that the Chinese people work very hard. Gradually, however, the African people come to see the benefits bringing by the railways and they are now willing to make friends with the Chinese here. My father has already made some African friends and one of them is planning to come to visit us. We are looking forward to show our African guest around our city.
3.多选题- (共2题)

A.a为电源负极 |
B.电极Ⅱ上发生还原反应 |
C.电子流向:a→Ⅰ→Ⅱ→b |
D.该装置将电能转化为化学能 |
4.填空题- (共3题)

(1)若X、Y都是惰性电极,a是AgNO3溶液,实验开始时,同时在两边各滴入几滴石蕊试液,则:
①电解池中Y电极上的电极反应式为______。在Y电极附近观察到的实验现象是________;检验该电极反应产物的方法是_____。
②X电极上的电极反应式为_______。
(2)如要用电解方法精炼粗镍,电解液a选用Ni(NO3)2溶液,则:
①X电极的材料是_______,电极反应式为__________;
②Y电极的材料是______,电极反应式为______。

(1)该电池的能量转化形式为____________。
(2)该电池正极的电极反应为____________。
(3)工作一段时间后,测得溶液的pH______,该电池总反应的化学方程式为_________。
(4)在生产生活中,金属腐蚀所带来的损失非常严重,所以防止金属腐蚀已经成为科学研究和技术领域的重大问题。兴趣小组的同学在实验室对金属腐蚀进行了探究。如图b所示,铁处于A、B、C三种不同的环境中,铁被腐蚀的速率由大到小的顺序是(填序号)_____。
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【1】题量占比
单选题:(5道)
选择题:(2道)
多选题:(2道)
填空题:(3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:6
7星难题:0
8星难题:2
9星难题:1