2021 无机化学实验（英文）(大连理工大学) 最新满分章节测试答案

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本课程起止时间为:2021-03-08到2021-06-28
本篇答案更新状态:已完结

Chapter 3. Purification of Copper Sulfate Quiz-Chapter 3. Purification of Copper Sulfate

1、 问题:When adding 6 mol/L ammonia to copper sulfate solution, the green precipitate appears first, then the precipitate dissolves and turns into blue solution. What is the green precipitate? 
选项：
A:Copper hydroxide
B:Copper dihydroxosulphate
C:Tetraamminecopper (II) ion
D:Hexaamminecopper (II) ion
答案: 【Copper dihydroxosulphate】

2、 问题:In the experiment of purification of copper sulfate, what pH value should be adjusted before the filtrate is evaporated and concentrated?
选项：
A:7
B:1-2
C:4
D:14
答案: 【1-2】

3、 问题:In the experiment of purification of copper sulfate, in order to remove iron and not reduce the yield of the product, what should be the pH value of the solution?
选项：
A:7
B:1-2
C:4
D:14
答案: 【4】

4、 问题:In the experiment of purification of copper sulfate, what solution should be used to adjust the pH of the solution？
选项：
A:Sodium hydroxide
B:Potassium hydroxide
C:Copper hydroxide
D:Copper dihydroxosulphate
答案: 【Sodium hydroxide】

5、 问题:In the copper sulfate purification experiment, if the solution in the evaporating dish turns green during evaporation, what is the reason? 
选项：
A:Copper ion hydrolyzes
B:The temperature is too high
C:The impurities are not removed completely
D:The evaporation is too dry and the crystal water is lost
答案: 【Copper ion hydrolyzes】

6、 问题:In the experiment of purification of copper sulfate, the filtrate was evaporated, concentrated and evaporated to dryness to get the purified copper sulfate.
选项：
A:正确
B:错误
答案: 【错误】

7、 问题:In the experiment of purification of copper sulfate, the pH should be adjusted above 4 to remove iron ion. 
选项：
A:正确
B:错误
答案: 【错误】

8、 问题:Chemical reagents are usually divided into four grades according to the purity.
选项：
A:正确
B:错误
答案: 【正确】

9、 问题:Crude copper sulfate usually contains soluble impurities such as ferrous sulfate and ferric sulfate, which can be removed by hydrolysis and filtration after adjusting pH.
选项：
A:正确
B:错误
答案: 【错误】

10、 问题:In the experiment of purification of copper sulfate, except for ferrous ion and iron ion, other trace soluble impurities are removed by remaining in the mother liquor.
选项：
A:正确
B:错误
答案: 【正确】

Chapter 8. Preparation of d-Block Elements Quiz-Chapter 8. Properties of d-Block Elements

1、 问题:A few drops of 0.1 mol/L FeSO4 solution is added in the test tube, and the solution is adjusted to the acidity with 2 mol/L HCl solution. Then 10 drops of thioacetamide solution is added. After heating in water bath, black FeS precipitation can be seen.
选项：
A:正确
B:错误
答案: 【错误】

2、 问题:Under the acidic condition, the reduction product of MnO4- is Mn2+.
选项：
A:正确
B:错误
答案: 【正确】

3、 问题:In the silver mirror experiment, it is better that the more ammonia water is added.
选项：
A:正确
B:错误
答案: 【错误】

4、 问题:Zn2+ is identified by adding CCl4 solution containing diphenylthiazone to the solution, and the reaction phenomenon is that the pink chelate is formed in the CCl4 solution.
选项：
A:正确
B:错误
答案: 【错误】

5、 问题:The newly prepared unoxidized [Cu(NH3)2]+ coordination ion is blue.
选项：
A:正确
B:错误
答案: 【错误】

6、 问题:Under the acidic condition, the reduction product of MnO4- is MnO2.
选项：
A:正确
B:错误
答案: 【错误】

7、 问题: Ag2O cannot dissolve in 2 mol/L NH3·H2O.
选项：
A:正确
B:错误
答案: 【错误】

8、 问题:When the preparation of SnCl2 solution, HCl solution is often added to prevent hydrolysis.
选项：
A:正确
B:错误
答案: 【正确】

9、 问题:Mn(OH)2, which is not oxidized, is a white solid.
选项：
A:正确
B:错误
答案: 【正确】

10、 问题:CuI is brown yellow precipitate.
选项：
A:正确
B:错误
答案: 【错误】

11、 问题:CrCl3 solution is gray green.
选项：
A:正确
B:错误
答案: 【错误】

12、 问题:Cr(OH)3 is a gray green precipitate.
选项：
A:正确
B:错误
答案: 【正确】

13、 问题:The unoxidized Fe(OH)2 is a white solid.
选项：
A:正确
B:错误
答案: 【正确】

14、 问题:Both Cr(OH) 3 and Co(OH) 2 are amphoteric.
选项：
A:正确
B:错误
答案: 【错误】

15、 问题:The hydroxides of Cr, Mn, Fe, Co and Ni are easily oxidized by air.
选项：
A:正确
B:错误
答案: 【错误】

16、 问题:The complex K3[Fe (CN) 6] is commonly named as Prussian Blue.
选项：
A:正确
B:错误
答案: 【错误】

17、 问题:When NaOH solution is added to AgNO3 solution, the final precipitate is Ag2O.
选项：
A:正确
B:错误
答案: 【正确】

18、 问题:The characteristics reaction of the identification of Cu2+ should be performed in a dilute acetic acid medium.
选项：
A:正确
B:错误
答案: 【正确】

Chapter 4. Acid-Base Reaction and Buffer Solution Quiz-Chapter 4. Acid-Base Reaction and Buffer Solu