第一章 单元测试

1、单选题:
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:confidence interval(置信区间)
C:standard uncertainty
D:nearness to the true value
答案: 【nearness to the true value

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

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

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

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

第二章 单元测试

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

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

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

4、多选题:
Which operations of volumetric flask may cause the concentration different from the actual one?( )
选项:
A:Rinse the volumetric flask with the solution to be prepared
B:Add the deionized water up to the mark
C:Rinse the volumetric flask with the deionized water
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、判断题:
Press the top of pipette with the thumb. ( )
选项:
A:错
B:对
答案: 【

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