第一章 单元测试

1、 问题: Which of the following is NOT a way to express the precision of a method? （ ）
选项：
A:standard deviation(标准偏差)
B:standard uncertainty
C:confidence interval(置信区间)
D:nearness to the true value
答案: 【
nearness to the true value
】

2、 问题: Which of the following is an inexact quantity? （ ）
选项：
A:The number of people in your chemistry class
B:The mass of a penny
C:The number of grams in a kilogram
D:The reaction ratio of H2 and O2 to produce H2O
答案: 【
The mass of a penny
】

3、 问题: What should you bring to the laboratory each time in this class? （ ）
选项：
A:safety goggles
B:lab coat
C:lab manual
D:some food
答案: 【
safety goggles
lab coat
lab manual
】

4、 问题: Which statements about lab-notebook are correct? （ ）
选项：
A:should be bound
B:use a pencil to write on it
C:should be prepared before coming to laboratory
D:can tear a page out casually
答案: 【
should be bound
should be prepared before coming to laboratory
】

5、 问题:Keep backpacks and other non-essential materials away from the laboratory benches(实验台). （ ）
选项：
A:对
B:错
答案: 【
对
】

第二章 单元测试

1、 问题:Which one is not the main component of suction filtration?（ ）
选项：
A:Buchner funnel
B:Vacuum pump
C:Erlenmeyer flask
D:Filter flask
答案: 【
Erlenmeyer flask
】

2、 问题:Which burette is suitable for strong oxidizing solutions(强氧化性溶液)?（ ）
选项：
A:Burette with rubber
B:Alkali burette
C:Burette with PTFE stopcock(聚四氟乙烯旋塞)
D:None of the above
答案: 【
Burette with PTFE stopcock(聚四氟乙烯旋塞)
】

3、 问题:Which balances are common used in this lab course? （ ）
选项：
A:Spring scale(弹簧秤)
B:Electronic balance(电子天平)
C:Analytical balance(分析天平)
D:Magnetic balance(磁天平)
答案: 【
Electronic balance(电子天平)
Analytical balance(分析天平)
】

4、 问题:Which operations of volumetric flask may cause the concentration different from the actual one?（ ）
选项：
A:Rinse the volumetric flask with the deionized water
B:Rinse the volumetric flask with the solution to be prepared
C:Add the deionized water up to the mark
D:Add the solution to be prepared up to the mark
答案: 【
Rinse the volumetric flask with the solution to be prepared
Add the solution to be prepared up to the mark
】

5、 问题:Press the top of pipette with the thumb. （ ）
选项：
A:对
B:错
答案: 【
错
】

第三章 单元测试

1、 问题:Which one is not the requirement for the reactions suitable for direct titrations? （ ）
选项：
A:take place quickly
B:take place essentially to completion
C:there are side reactions
D:there are no side reactions
答案: 【
there are side reactions
】

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