1.选择题- (共2题)
1.高锰酸钾[KMnO4]是常用的氧化剂．工业上以软锰矿（主要成分是MnO2）为原料制备高锰酸钾晶体．中间产物为锰酸钾[K2MnO4]．图1是实验室模拟制备的操作流程：
相关资料：
①物质溶解度
物质 | KMnO4 | K2CO3 | KHCO3 | K2SO4 | CH3COOK |
20℃溶解度 | 6.4 | 111 | 33.7 | 11.1 | 217 |
②锰酸钾[K2MnO4]
外观性状：墨绿色结晶．其水溶液呈深绿色，这是锰酸根（MnO42﹣）的特征颜色．
化学性质：在强碱性溶液中稳定，在酸性、中性和弱碱性环境下，MnO42﹣会发生歧化反应．
试回答下列问题：
2.某化学研究性学习小组对溶液作如下的归纳总结（均在常温下）．其中正确的是（ ）
①pH=3的强酸溶液1mL，加水稀释至100mL后，溶液pH降低2个单位
②1L 0.50mol•L﹣1NH4Cl 溶液与2L 0.25mol•L﹣1 NH4Cl 溶液含NH4+ 物质的量前者大
③在某钠盐溶液中含有等物质的量的Cl﹣、I﹣、AlO2﹣、CO32﹣、NO3﹣、SiO32﹣中若干种，当加入过量的盐酸产生气泡，溶液颜色变深，阴离子种数减少3种，则原溶液中一定有CO32﹣
④pH=4、浓度均为0.1mol•L﹣1 的CH3COOH、CH3COONa混合溶液中：c（CH3COO﹣）﹣c（CH3COOH）=2×（10﹣4﹣10﹣10） mol/L．
2.单项选择- (共8题)
3.
Our school sports meeting we had looked forward to______ in _______ fine weather, which was beyond our expectation.
| A．falling; so | B．falling; such | C．fell; such | D．fall; so |
4.
We’ll never forget this terrible accident and the damage_______has caused to the area.
| A．that | B．what | C．it | D．one |
5.
---You’ve read the Frog by Moyan,haven’t you?
---Yes,I_______second time and I got a better understanding.
---Yes,I_______second time and I got a better understanding.
| A．have read a | B．had read the | C．will read the | D．read a |
6.
It was foolish of you to take a taxi ______you could walk there in five minutes.
| A．if | B．as | C．how | D．when |
7.
We should get prepared for dealing with ________problems_________.
| A．any, arise | B．which, are arisen | C．whatever, arise | D．what, are arisen |
8.
_______, I believe, and you will find the student is very outgoing.
| A．One talk with him | B．Given a talk with him |
| C．Having a talk with him | D．If you have a talk with him |
9.
--- You ought to have given them some advice.
--- , but who cared what I asked?
--- , but who cared what I asked?
| A．I ought to | B．So I ought | C．So it was | D．So I did |
试卷分析
-
【1】题量占比
选择题:(2道)
单项选择:(8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：8
7星难题：0
8星难题：0
9星难题：0