2021 Analytical Chemsitry(Dalian University of Technology) 最新满分章节测试答案

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本课程起止时间为:2021-04-25到2021-07-26

2 The Assessment of Analytical Data (Section 2.1~2.4) Chapter 2 TEST

1、 问题:Which of the following can be used to minimize the indeterminate error
选项：
A:conducting a blank test
B:increasing number of measurement
C:calibrating the instrument
D:performing a comparative test
答案: 【increasing number of measurement】

2、 问题:The number of [H+] when pH=3.02 contains exactly (  ) significant figures.
选项：
A:3
B:4
C:2
D:1
答案: 【2】

3、 问题:In the following statements, which is wrong?
选项：
A:the method errors belong to systematic errors.
B:the systematic error are also called determinate errors.
C:the systematic errors can be eliminated.
D:the systematic error follows a Gaussian distribution.
答案: 【the systematic error follows a Gaussian distribution.】

4、 问题:In order to test if there exists the error introduced by reagent in experiment, which method should be taken.
选项：
A:blank test
B:contrast experiment
C:calibration of instrument
D:increase the replicate number of the determination
答案: 【blank test】

5、 问题:which of the following can be used to eliminate the determinate error
选项：
A:conducting a blank test
B:performing a comparative test
C:calibrating the instrument
D:increasing number of measurement
答案: 【conducting a blank test;
performing a comparative test;
calibrating the instrument】

6、 问题:The concentration of HCl solution is 0.0765, it contains 4 significant figures.
选项：
A:正确
B:错误
答案: 【错误】

7、 问题:Accuracy indicates the closeness of the measurement to its true or accepted value.
选项：
A:正确
B:错误
答案: 【正确】

8、 问题:Precision describes the reproducibility of measurement. 
选项：
A:正确
B:错误
答案: 【正确】

9、 问题:Indeterminate error can be corrected by calibrating the   instruments.
选项：
A:正确
B:错误
答案: 【错误】

10、 问题:When the confidence level is constant, the more the determining times, the wider the confidence interval.
选项：
A:正确
B:错误
答案: 【错误】

1 Introduction chapter 1 Test

1、 问题:Volumetry belongs to（）
选项：
A:gravimetry
B:chemical analysis
C:instrumental analysis
D:structure analysis
答案: 【chemical analysis】

2、 问题:Which one is the right analytical procedures?
选项：
A:Sampling-Measurement-Calculations of results- Evaluation of data
B:Sampling- Pretreatment-Measurement- Calculations and Evaluation of Data
C:Sampling- Pretreatment-Titration- Calculations and Evaluation of data
D:Sampling- Pretreatment-Measurement- Calculations of results
答案: 【Sampling- Pretreatment-Measurement- Calculations and Evaluation of Data】

3、 问题: When the size of the sample is between 0.1-10mg, the analysis is called:
选项：
A:major analysis
B:minor analysis
C:trace analysis
D:self-minor analysis
答案: 【minor analysis】

4、 问题:Comparing with chemical analysis, the sensitivity of instrumental analysis is:
选项：
A:difficult to judge
B:lower
C:higher
D:similar
答案: 【higher】

5、 问题:Which one in the following methods can be used to perform a minor analysis? 
选项：
A:Electrochemical analysis
B:Ultraviolet-visible spectrophotometry
C:Titrimetry
D:Gravimetry
答案: 【Electrochemical analysis;
Ultraviolet-visible spectrophotometry】

6、 问题:According to the different analytical tasks, analytical methods can be classified to:
选项：
A:qualitative analysis
B:quantitative analysis
C:structure analysis
D:inorganic analysis
答案: 【qualitative analysis;
quantitative analysis;
structure analysis】

7、 问题:Analytical chemistry is call the Information Science in chemistry because of its obtaining informations on chemical compositions and properties of matter.
选项：
A:正确
B:错误
答案: 【正确】

8、 问题:The accuracy of the instrumental analysis is always better than that of the chemical analysis.
选项：
A:正确
B:错误
答案: 【错误】

9、 问题:Analytical methods are classified into chemical analysis and instrumental analysis according to the principle of measurement.
选项：
A:正确
B:错误
答案: 【正确】

10、 问题:The significances of analytical chemistry and chemical analysis are the same.
选项：
A:正确
B:错误
答案: 【错误】

3 Titrimetric analysis chapter 3 Test

1、 问题: For the following statements, (   ) is wrong.
选项：
A: the larger the Ka, the larger the titration break.
B:the higher the concentration of the titrant, the larger the titration break.
C:the larger the Ks, the larger the titration break.
D:the larger the Ksp, the larger the titration break.
答案: 【the larger the Ksp, the larger the titration break.】

2、 问题:For the following statements concerning αY(H) ,  which is correct?
选项：
A:αY(H) decreases as pH decreases.
B:αY(H) is always less than 1.
C:lgαY(H)  approaches zero at high pH.
D:None of the above.
答案: 【lgαY(H)  approaches zero at high pH.】

3、 问题:For precipitation, the indicators used in Mohr method and Volhard method are （  ）
选项：
A:NH4SCN and AgNO3
B:AgNO3 and NH4Fe(SO4)2
C:K2CrO4 and NH4Fe(SO4)2
D:K2CrO4 and NH4SCN
答案: 【K2CrO4 and NH4Fe(SO4)2】

4、 问题:A NaOH standard solution absorbed a small amount of CO2, if this solution is used to titrate HCl solution and the methyl orange is employed as an indicator, (  ) will be obtained.
选项：
A:a higher result 
B:a lower result
C:a correct result
D:uncertain result
答案: 【a higher result 】

5、 问题:Which of the following acids can not be titrated directly by bases.