有機化学

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1594 questions about the range of organic compounds. It is created based on the past questions of major universities and the latest entrance examination questions. It covers all the knowledge necessary for entrance examinations. (* The range does not deviate from the textbook) I made questions based on the entrance exam questions as follows. Tohoku University First half of 2016 (and many others such as the University of Tokyo) This is because polyvinyl alcohol itself is unstable and immediately changes to the structural isomer [A]. [A] can be obtained by adding water to [B] using mercury (II) sulfate as a catalyst. [A] Acetaldehyde [A] Acetylene In-app questions (excerpts of questions and correct answers only) Q. [____] occurs when water is added to acetylene using a catalyst. (Does not include intermediates). A. Acetaldehyde. There is vinyl alcohol in the intermediate, but it immediately changes to acetaldehyde. Q. Acetaldehyde is produced when water is added to [____] using a catalyst. A. Acetylene Tohoku University 2016 first half When the aqueous solution of [c] is added while cooling the dilute hydrochloric acid solution of aniline to 5 ° C or lower, [d] is generated. When this salt is heated in an acidic aqueous solution, it decomposes while generating a gas [o] to produce compound E. [C] Sodium nitrite NaNO2 [D] Benzenediazonium chloride C6H5-N2Cl [O] Nitrogen N2 [Compound E] Phenol C6H5-OH In-app questions (excerpts of questions and correct answers only) Q. Select a substance that produces benzenediazonium chloride when aniline is dissolved in dilute hydrochloric acid and added while cooling to 5 ° C or lower. A. Sodium nitrite aqueous solution Q. Choose the chemical formula of sodium nitrite. A. NaNO2 Q. Select the substance that is produced by dissolving aniline in dilute hydrochloric acid, cooling it to 5 ° C or lower, and adding an aqueous solution of sodium nitrite. A. Benzenediazonium chloride (aqueous solution) Q. What happens to benzenediazonium chloride (aqueous solution) above 5 ° C? A. Nitrogen, phenol and hydrochloric acid (The following related issues are also included) Q. Select the appropriate conditions for producing benzenediazonium chloride from aniline. A. Cool to 5 ℃ or less Q. What is the reaction when producing benzenediazonium chloride from aniline? A. Diazotization Questions are asked based on the problems of major universities, and the range of textbooks is incorporated as much as possible in anticipation of difficult problems. We divide the important points to be held down and create the problem from multiple angles. (We are sending out entrance exam questions and app questions from Twitter. Please follow @kagaku_y_test) ■ Extracted data (examined while solving entrance exam questions) 30 years from the University of Tokyo (University of Tokyo) 25 years of Kyoto University (Kyoto University) More than 20 years at Tokyo Institute of Technology (Tokyo Institute of Technology) 20 years of Osaka University

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