After the second participation of the re-examination test of organic chemistry, I have a deep understanding. The teacher will not give me a special question for me. That is to say, there is only one test paper. It is now published as follows:
1) The principle of distillation, how to prevent boiling, how should it be dealt with after the boiling?
2) Precautions for the use of grinding instruments
3) How does the refractive index measure (what instruments used)? What issues should be paid attention to in the process of using this instrument?
4) What issues should be paid attention to when making a thin layer board used in measuring chromatography?
5) What is the purpose of adding sucrose during elemental qualitative analysis? Why?
6) There is red impurities in benzoic acid, please design the purified scheme, and draw the purification flow chart
7) A, B, and C are white solids having a melting point of 128-130 degrees Celsius. How to use physical methods to distinguish between the same substance
8) Your harvest and experience in organic chemistry tests.
Just these, if I still have .... If someone has Xin to step, I can step, I will do the only one who re-repairs undergraduate. This article will have a lot of role in you :)
