大学MOOC Analytical Chemistry Experiment(Dalian University of Technology)1458266169 最新慕课完整章节测试答案

Laboratory Safety Test

1、单选题：
‏Which of the following operations exists insecurity? ‍
选项：
A: Experiments using volatile reagents and toxic gases should be conducted in a fume hood.
B: When opening a volatile reagent bottle, do not face the face or other people, it should be carried out in a fume hood.
C: When diluting concentrated sulfuric acid, the water should be slowly poured into concentrated sulfuric acid and continuously stirred.
D: When diluting concentrated sulfuric acid, the concentrated sulfuric acid should be poured slowly into the water and continuously stirred.
答案: 【 When diluting concentrated sulfuric acid, the water should be slowly poured into concentrated sulfuric acid and continuously stirred.】

2、单选题：
‍Which of the following operation is correct?  ‌
选项：
A: Eat in the laboratory
B: Drink deionized water in the laboratory
C: Wash hands carefully after the experiment
D: Wear high heels in the laboratory
答案: 【 Wash hands carefully after the experiment】

3、单选题：
‏For personal safety protection, which of the following practices is wrong?​
选项：
A:  Wear goggles when entering the laboratory.
B:  Wear a laboratory coat entering the laboratory.
C:  Wear full mouth shoes with flat soles, antiskid, synthetic leather or leather when entering the laboratory.
D:  Take disposable gloves to access corrosive reagents.
答案: 【  Take disposable gloves to access corrosive reagents.】

4、单选题：
​Which of the following treatment methods is correct for the waste liquid produced by the experiments?‎
选项：
A:  All waste liquid can be poured into the same waste liquid collection bottle.
B: Dilute with water and pour into the sewer.
C: The waste liquid in the experiment must be recovered and disposed according to uniform requirements.
D: Drain directly into the sewer.
答案: 【 The waste liquid in the experiment must be recovered and disposed according to uniform requirements.】

5、单选题：
‍Which of the following operation is wrong?​
选项：
A: Waste contaminated with chemicals and fragile glass instruments should be classified and recycled with household garbage.‍
B: Harmless treatment should be done for the special, high-risk and highly toxic chemical waste.
C: Rags contaminated with chemicals can still be put in household trash bin.
D: Do not mix two liquids arbitrarily to avoid danger.
答案: 【 Rags contaminated with chemicals can still be put in household trash bin.】

6、单选题：
‍What kind of gloves should be used when assembling and disassembling glass instruments?‏
选项：
A:  Cut-resistant gloves
B: Heat-resistant gloves
C:  Disposable gloves
D:  Low temperature resistant gloves
答案: 【  Cut-resistant gloves】

7、单选题：
‎When the clothes are on fire during the experiment, which of the following operations is wrong?‌
选项：
A: Nearby people use fire blankets to wrap the body to extinguish the fire.
B: If necessary, take medical treatment.
C: When the back is on fire, you can roll on the ground to extinguish the fire, or use an emergency sprinkler nearby.
D: Run outside for help.
答案: 【 Run outside for help.】

8、单选题：
​Which of the following operation is wrong?  ​
选项：
A:  Sniff the smell of chemical reagents directly with your nose for the chemical reagents or unknown objects.
B:  After splashing acid on the eyes in the experiment, wash them with eye washer for several minutes immediately, and then go to the hospital immediately.
C: Water, electricity and gas should be shut off before leaving the laboratory.
D: For chemical reagents or unknown substances, a small amount of gas should be blown out by hand to smell. It is not allowed to smell directly by nose.
答案: 【  Sniff the smell of chemical reagents directly with your nose for the chemical reagents or unknown objects.】

9、判断题：
‏Chemicals in laboratory must be labeled with their names to avoid misuse. ‏
选项：
A: 正确
B: 错误
答案: 【 正确】

10、判断题：
‌When using the fire extinguisher to extinguish the fire, the nozzle of the fire extinguisher shall be aligned with the middle of the flame. ​
选项：
A: 正确
B: 错误
答案: 【 错误】

11、判断题：
‎During the chemical experiment, contact lenses can be worn to protect the eyes.‎
选项：
A: 正确
B: 错误
答案: 【 错误】

12、判断题：
‏During the experiment, you can extend your head into the fume hood so that you can see clearly and operate flexibly.​
选项：
A: 正确
B: 错误
答案: 【 错误】

13、判断题：
‎Chemicals and laboratory instruments should not be placed at the exit of the fume hood to avoid danger.​
选项：
A: 正确
B: 错误
答案: 【 正确】

14、判断题：
‌Myopia mirror can play a reliable protective role, so it is not necessary to wear goggles outside during the experiment.‍
选项：
A: 正确
B: 错误
答案: 【 错误】

15、判断题：
​Eyewashes should be checked regularly to ensure that the water pressure is sufficient and water is ejected during use.‍
选项：
A: 正确
B: 错误
答案: 【 正确】

16、判断题：
‍When chemicals are splashed into the eyes, you should thoroughly rinse them with an eyewash immediately. When rinsing, open the eyelids, carefully rinse with tap water for several minutes and then with distilled water, finally go to the medical office for treatment.‏
选项：
A: 正确
B: 错误
答案: 【 正确】

17、判断题：
‏ You can wear sneakers with mesh to enter the laboratory.‏
选项：
A: 正确
B: 错误
答案: 【 错误】

18、判断题：
‍During the experiment, students with long hair must tie their hair.‌
选项：
A: 正确
B: 错误
答案: 【 正确】

19、判断题：
​During the experiment, when you have a minor cut, you should forcefully wash the wound with soap and water for a few minutes, and squeeze the blood out.‎
选项：
A: 正确
B: 错误
答案: 【 正确】

20、判断题：
‏When the fire on the body is extinguished, the clothes sticking to the skin should be taken off immediately. ​
选项：
A: 正确
B: 错误
答案: 【 错误】

21、判断题：
‍After being corroded by strong acid, it should be rinsed with a large amount of water immediately to avoid deep injury, and then dipped and washed with dilute NaHCO3 solution, and finally washed with water. ‏
选项：
A: 正确
B: 错误
答案: 【 正确】

22、判断题：
‏After being corroded by strong alkali, immediately rinse with a large amount of water, then rinse with 2% acetic acid solution or 1% boric acid solution, and finally wash with water.​
选项：
A: 正确
B: 错误
答案: 【 正确】

23、判断题：
‍In the event of a fire, cover your nose with a dry towel to avoid being smoked.‎
选项：
A: 正确
B: 错误
答案: 【 错误】

Test of Basic Operation

1、单选题：
‏Which kind of injector must be used in liquid chromatography? ‍
选项：
A: Microliter pipet
B: Pointed microinjector
C: Flat head or pointed microinjector
D: Flat head microinjector
答案: 【 Flat head microinjector】

2、单选题：
‌How many times should the buret be rinsed with titrant at least after it is rinsed with deionized water?‎
选项：
A: One times
B: Two times
C: Five times
D: Three times
答案: 【 Three times】

3、单选题：
‌In a pH meter, the function of the slope knob is​
选项：
A: to compensate the liquid junction potential of the glass electrode.
B: to compensate the asymmetry potential of the glass electrode.
C: to compensate the deviation of the slope of the glass electrode from the theory
D: to compensate the change of the slope of the glass electrode with temperature
答案: 【 to compensate the deviation of the slope of the glass electrode from the theory】

4、单选题：
​When using a two-point calibration method to correct pH on a pH meter, if the test solution is acidic, the appropriate standard buffer solution should be‌
选项：
A: Standard buffer solutions (25℃) at pH 6.864 and 9.182.
B: Standard buffer solution at pH 4.003 (25℃).
C: Standard buffer solutions (25℃) at pH 6.864 and 4.003.
D: Standard buffer solution at pH 6.864 (25℃).
答案: 【 Standard buffer solutions (25℃) at pH 6.864 and 4.003.】

5、单选题：
‏Ultraviolet-visible spectrophotometer generally consists of light source, (       ), sample chamber and detector.‎
选项：
A: Spectroscopic system
B: Cuvet
C: Deuterium lamp
D: Chromatographic column
答案: 【 Spectroscopic system】

6、单选题：
‍The light source of the ultraviolet-visible spectrophotometer can be (       ) or deuterium lamp.‌
选项：
A: Hollow cathode lamp
B: Tungsten halogen lamp
C: Silicon carbide rods
D: Pulsed xenon lamp
答案: 【 Tungsten halogen lamp】

7、单选题：
​When turning on the gas chromatograph, you should first ‎
选项：
A: Set temperature
B: Power on the host
C: Power on the detector
D: Turn on the carrier gas
答案: 【 Turn on the carrier gas】

8、单选题：
‍Which can be used as the detector of high performance liquid chromatography?&