1. This homologous series is called, The general formula of this homologous series is C, 3) The successive members of a homologous series differ by a -CH. 4. She has started this educational website with the mindset of spreading Free Education to everyone. The first member of homologous series generally shows certain different chemical behavior than other members of the series. Get Tyrocity mobile app for your Android device, Address: ChadaniChowk, Tyanglaphat, Kritipur, Nepal, © TyroCity.com 2012-2020 All rights reserved. Your email address will not be published. The members of a homologous series can be prepared by same or common general method of preparation. (adsbygoogle = window.adsbygoogle || []).push({}); Homologous series is defined as a systematic order of organic compounds having same functional group that can be represented by same general formula and prepared by same method. This homologous series is called alcohols. 3. -CHO group. Required fields are marked *, These hydrocarbons can be represented by the same general formula, Any two adjacent members of this class differ by a CH, If a hydrogen atom is replaced by a hydroxyl group i.e. Characteristics of homologous series: 1. 2) All the members of a given homologous series possess the same functional group. 3) The successive members of a homologous series differ by a -CH2 group. The difference between two consecutive members in their composition is –CH2unit. 4) The individual members of a homologous series can be prepared by the general methods of preparation developed for that series. Homologous series helps in determination of structure of the successive member of the series and the property of that members can also be predicted by their series. 2. Let us consider members of alkanes given in Table 11.1. Organic Chemistry - Some Basic Principles and Techniques, Economics Chapter 1 Development – Notes & Study Material, Geography Chapter 6 Manufacturing Industries – Notes & Study Material. (iii) Their physical properties such as melting point, boiling point, density, generally show a gradual change with increase of molecular formula in the series. The individual members of such a series are called homologues and the phenomena is called homology. The functional group of aldehyde is aldehydic group i.e. Carbon chains of varying length have been observed in organic compounds having the same general formula. Characteristics of a Homologous series 1) Each homologous series can be represented by a general formula. The members of a series have same functional group. (ii) They have the same functional group. 5) The physical properties such as density, melting point, boiling point of the members of homologous series show a regular gradation with rise in molecular mass. Your email address will not be published. For Ex:The functional group of alcohols is the hydroxyl group i.e. The physical properties(like solubility, melting point, boiling point, state) of members of a homologous series either gradually increase or decrease with increase in molecular mass. Tyrocity.com envisions the education system of the country to be redefined through active engagement, discussions, required assistance and by bringing the right information to your fingertips. These hydrocarbons can be represented by the same general formula CnH2n+2 Where n is the number of carbon atoms. Two consecutive members of a homologous series differs each other in their composition by –CH. 2. 7. You can follow and Like us on following social media.Website - http://ekeeda.comParent Channel - https://www.youtube.com/c/ekeedaFacebook - https://www.facebook.com/ekeedaTwitter - https://twitter.com/Ekeeda_VideoLinkedIn- https://www.linkedin.com/company-beta/13222723/Instgram - https://www.instagram.com/ekeeda_/Pinterest - https://in.pinterest.com/ekeedavideoYou can reach us at care@ekeeda.comHappy Learning : ) 6. The members of a particular homologous series have almost same chemical properties due to presence of same functional group. Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 2 Comments. If a hydrogen atom is replaced by a hydroxyl group i.e. The functional group of ketones is the ketonic group i.e -CO group. The general formula of this homologous series is CnH2n+1OH. The general characteristics of a homologous series are: (i) All compounds in the series are composed of the same elements and contain the same functional group. Homologous series is the characteristic feature of carbon compounds in which carbon and hydrogen atoms in hydrocarbons varying by single parameter. Any two adjacent members of this class differ by a CH2 group. The members of a series have same functional group. Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. Each member of a homologous series is known as homologue and this phenomenon is called homology. Homologous Series and its Characteristics with Examples - … 5. (ii) All compounds in the series can be represented by one general formula, e.g., the homologous series of monohydric alcohols can be represented by the general formula C n H 2n+1 OH. Four characteristics of a homologous series are: (i) The general formula of all compounds in the series is the same. | Privacy Policy | Terms of Service. Homologous Series and its Characteristics with Examples Video Lecture from Basic Principles and Techniques in Organic Chemistry Chapter of Chemistry Class 11 for HSC, IIT JEE, CBSE \u0026 NEET.Android Application - https://play.google.com/store/apps/details?id=student.ekeeda.com.ekeeda_student\u0026hl=enAccess the Complete Playlist of Chapter Basic Principles and Techniques in Organic Chemistry - https://www.youtube.com/playlist?list=PLufui6SrOPupcq5Mp6s9fPPqqlALp7qAaAccess the Complete Playlist of Subject Chemistry Class 11 - https://www.youtube.com/playlist?list=PLm_MSClsnwm8IZSj7AVFqQqBtCgGe3Ak6#HomologousSeriesanditsCharacteristicswithExamples#BasicPrinciplesandTechniquesinOrganicChemistry #ChemistryClass11#ChemistryClass11JEE#ChemistryClass11lectures#OnlineFYJCVideoLectures#OnlineVideoLectures#EkeedaOnlineLectures#EkeedaVideoLectures#EkeedaVideoTutorialBasic Principles and Techniques in Organic Chemistry Chemistry Class 11Chemistry Class 11 LecturesThanks For Watching.