In this class, we will review organic oxidation reactions. We will see how to easily identify the oxidation and reduction process of carbon compounds by the number of carbon-oxygen bonds, going through incomplete and complete combustion reactions, oxidation of primary and secondary alcohols by means of potassium permanganate or potassium dichromate in an acidic medium, identification of geminal alcohol and its decomposition process. We will also talk about oxidations in double bonds: Ozonolysis Mild Oxidation Energetic Oxidation All of this illustrated by solving the following exercises: (UNICAMP 2016) We can obtain energy in the body by oxidizing different sources. Among these sources, fat and sugar stand out. Fat can be represented by a minimum formula (CH2)n while a sugar can be represented by (CH2O)n. Considering these two energy sources, we can correctly state that, in the total oxidation of 1 gram of both sources in our body, the products formed are (A) the same, but the amounts of energy are different. (B) different, but the amounts of energy are equal. (C) the same, as well as the amounts of energy. (D) different, as well as the amounts of energy. (UFPR 2015) The retina of the human eye contains two types of specialized cells: cones and rods. In the rods, a chemical transformation that is fundamental to the chemistry of vision occurs. This is the conversion of retinol (Vitamin A) into retinal, which will subsequently undergo other transformations. Regarding the topic, consider the following statements: I. The alcohol functional group in retinol is converted to aldehyde in retinal. II. The double bond between carbons 11 and 12 undergoes an isomerization reaction. III. The retinal molecule has a higher degree of oxidation than retinol. IV. The retinol molecule has a chiral center at carbon 15. Select the correct alternative. (A) Only statement I is true. (B) Only statement III is true. (C) Only statements I, II, and III are true. (D) Only statements I and IV are true. (E) Only statements II, III, and IV are true. (ENEM 2017) Ozonolysis, a reaction used in the timber industry for paper production, is used on a laboratory scale in the synthesis of aldehydes and ketones. The double bonds of alkenes are cleaved by oxidation with ozone (O3), in the presence of water and metallic zinc, and the reaction produces aldehydes and/or ketones, depending on the degree of substitution of the double bond. Disubstituted double bonds generate ketones, while terminal or monosubstituted double bonds give rise to aldehydes, as shown in the diagram. Consider the ozonolysis of the compound 1-phenyl-2-methylprop-1-ene: What are the products formed in this reaction? (A) Benzaldehyde and propanone. (B) Propanal and benzaldehyde. (C) 2-phenyl-ethanal and methanal. (D) Benzene and propanone. (E) Benzaldehyde and ethanal. (ENEM 2015) Potassium permanganate (KMnO4) is a strong oxidizing agent widely used in both laboratory and industrial levels. In the oxidation of straight-chain alkenes, such as 1-phenyl-1-propene, illustrated in the figure, KMnO4 is used to produce carboxylic acids. The products obtained in the oxidation of the represented alkene, in aqueous KMnO4 solution, are: (A) Benzoic acid and ethanoic acid. (B) Benzoic acid and propanoic acid. (C) Ethanoic acid and 2-phenylethanoic acid. (D) 2-phenylethanoic acid and methanoic acid. (E) 2-phenylethanoic acid and propanoic acid. ???? SUBSCRIBE TO THE CHANNEL ???? Did you like the video? Leave your LIKE! Follow me on social media: ✏️Instagram: / prof_igor_quimica ✏️Twitter: / igorsuga ✏️Blog: https://igorsuga.wordpress.com/ #chemistry #oxidation #review #enem2022 #entranceexamstudent #oxidation #questionsolving #redox #organicchemistry #igorchemistry #reviewclass #enemreview #fuvestreview #unicampreview #medbulando