Mixture Of Ph CHO And HCHOis Treated With NaOH Then Class 12 ...

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Sign InMixture of $Ph - CHO$ and $HCHO$is treated with $NaOH$ then Cannizzaro reaction involves :(A) Oxidation of $HCHO$(B) Reduction of $HCHO$(C) Oxidation of $Ph - CHO$(D) Reduction of $Ph - CHO$

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• Class 12

• Chemistry

• Mixture of Ph CHO and HCHOis t...

AnswerStudy MaterialsNCERT Solutions For Class 12Important Questions for Class 12Revision Notes for Class 12NCERT BooksMaths Formula for Class 12Sample PapersClass 12 MathsClass 12 PhysicsClass 12 ChemistryClass 12 BiologyClass 12 EnglishClass 12 Computer ScienceClass 12 Business StudiesClass 12 EconomicsClass 12 AccountancyClass 12 HindiPrevious Year Question PapersClass 12 Maths Question PapersClass 12 Physics Question PapersClass 12 Chemistry Question PapersClass 12 Biology Question PapersClass 12 English Core Question PapersClass 12 English Elective Question PapersClass 12 Hindi Core Question PapersClass 12 Hindi Elective Question PapersClass 12 Computer Science Question PapersClass 12 Business Studies Question PapersClass 12 Accountancy Question PapersClass 12 Physical Education Question PapersCBSE Class 12 Economics Question PapersClass 12 Entrepreneurship Question PapersExam InfoDate SheetMarking SchemeResultSyllabusMaths SyllabusPhysics SyllabusChemistry SyllabusBiology SyllabusEnglish SyllabusHindi SyllabusAccountancy SyllabusBusiness Studies SyllabusEconomics SyllabusPolitical Science SyllabusPhysical Education SyllabusTextbook SolutionsClass 12 NCERT Exemplar SolutionsClass 12 HC Verma SolutionsClass 12 RD Sharma SolutionsClass 12 RS Aggarwal SolutionsClass 12 DK Goel SolutionsClass 12 TS Grewal SolutionsClass 12 Sandeep Garg SolutionsAnswerVerified434.7k+ viewsHint: Some examples of Cannizzaro reaction are formaldehyde, benzaldehyde, etc. There are two types of Cannizzaro reactions, self Cannizzaro and cross Cannizzaro. Self Cannizzaro reaction is the reaction involving condensation of the same aldehyde molecule. And the cross Cannizzaro reaction is the one involving two different aldehydes.Complete step by step answer:When two molecules of aldehydes not containing $\alpha $hydrogen are reacted with 50 $\% $ alkalies undergo oxidation-reduction disproportionate to give corresponding alcohols and salts of carboxylic acid. This reaction is called Cannizzaro's reaction.The reaction between benzaldehyde and formaldehyde is an example of cross Cannizzaro reaction and is given as Here, benzaldehyde gets reduced to benzyl alcohol by gaining two hydrogen atoms and formaldehyde is oxidized to sodium formate by gaining two oxygen atoms. So, this is an example of a redox reaction.In a redox reaction, one of the reactants is oxidized and the other is reduced simultaneously. Oxidation is defined as the gain of oxygen atoms or loss of hydrogen atoms with an increase in oxidation number.The reduction is defined as the loss of oxygen atoms or gain of hydrogen atoms with a decrease in oxidation number.So, $Ph - CHO$is undergoing reduction, and $HCHO$ is undergoing oxidation.So, the correct answer is option A,D.Note: In cross Cannizzaro, the smaller aldehyde undergoes oxidation and the bigger aldehyde, reduction.And also, for carrying out the Cannizzaro reaction, the condition of 50 $\% $ NaOH and absence of $\alpha $ hydrogen is necessary. $\alpha $ Hydrogen is defined as the hydrogen atom attached to a carbon atom i.e. the carbon atom next to the functional group.Recently Updated PagesIdentify the feminine gender noun from the given sentence class 10 english CBSEYour club organized a blood donation camp in your city class 10 english CBSEChoose the correct meaning of the idiomphrase from class 10 english CBSEIdentify the neuter gender noun from the given sentence class 10 english CBSEChoose the word which best expresses the meaning of class 10 english CBSEChoose the word which is closest to the opposite in class 10 english CBSEIdentify the feminine gender noun from the given sentence class 10 english CBSEYour club organized a blood donation camp in your city class 10 english CBSEChoose the correct meaning of the idiomphrase from class 10 english CBSEIdentify the neuter gender noun from the given sentence class 10 english CBSEChoose the word which best expresses the meaning of class 10 english CBSEChoose the word which is closest to the opposite in class 10 english CBSE

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