For PDF Notes and best Assignments visit physicswallahalakhpandey.com/ Live Classes, Video Lectures, Test Series, Lecturewise notes, topicwise DPP, dynamic Exercise and much more on Physicswallah App. Download the App from Google Playstore ( bit.ly/2SHIPW6 ) Physicswallah Instagram Handle : instagram.com/physicswallah/ Physicswallah Facebook Page: facebook.com/physicswallah Physicswallah Twitter Account : twitter.com/PhysicswallahAP?s=20 Physicswallah App on Google Play Store : bit.ly/2SHIPW6 Physicswallah Website: physicswallahalakhpandey.com/ LAKSHYA Batch(2020-21) Join the Batch on Physicswallah App bit.ly/2SHIPW6 Registration Open!!!! What will you get in the Lakshya Batch? 1) Complete Class 12th + JEE Mains/ NEET syllabus - Targeting 95% in Board Exams and Selection in JEE MAINS / NEET with a Strong Score under Direct Guidance of Alakh Pandey. 2)Live Classes and recorded Video Lectures (New, different from those on KZfaq) 3)PDF Notes of each class. 4)DPP: Daily Practice Problems with each class having 10 questions based on the class of JEE Mains/NEET level. 5)Syllabus Completion by end of January, 2021 with topicwise discussion of Last 10 Years Problems in Boards, JEE Mains/NEET within Lecture. 6)The Complete Course (Video Lectures, PDF Notes, any other Study Material) will be accessible to all the students untill JEE Mains & NEET 2021 (nearly May 2021) 7)In case you missed a live class, you can see its recording. 8)You can view the videos any number of times. 9)Each chapter will be discussed in detail with all concepts and numericals 10)Chapterwise Approach towards JEE Mains/ NEET & Board Exams. ****Test Series for XI & XII**** We provide you the best test series for Class XI,XII, JEE, NEET chapterwise, which will be scheduled for whole year. The test series follows very logical sequence of Basic to Advance questions.& Evaluation of Test and Solution to all the questions at the end of the test. Class 11 chapter 12 | ISOMERiSM 01 | Introduction : Chain and Position Isomerism IIT JEE MAINS/NEET kzfaq.info/get/bejne/o9dhf5Wh0aq4ook.html Isomerism 02 || Structural Isomers : How to Find Total Structural Isomers D.B.E. IIT JEE MAINS/NEET kzfaq.info/get/bejne/lbijqbR0m5-roXk.html Isomerism 03 || Functional Isomerism , Metamerism , Ring Chain Isomerism IIT JEE MAINS / NEET || kzfaq.info/get/bejne/b82knJilu7Glp40.html Isomerism 04 || Tautomerism 01 : |Condition to Show Tautomerism and Special Cases JEE MAINS / NEET kzfaq.info/get/bejne/g8pyq7WG2p6Vh2g.html Isomerism 05 || Tautomerism 02 || Percentage of Enol Content N Stability of Enol JEE MAINS / NEET || kzfaq.info/get/bejne/nJ9niduavczOnGw.html Isomerism 06 | Stereoisomerism : Geometrical Isomers 01| Cis-Trans / E -Z / Syn-Anti JEE MAINS/NEET kzfaq.info/get/bejne/eZ1zgMd5l92Up3k.html Isomerism 07 || Geometrical Isomers 02 : Cycloalkanes , Allenes , Spiro , Biphenyl JEE MAINS / NEET kzfaq.info/get/bejne/gZ-WmL1ykt6Ummg.html Isomerism 08 || Geometrical Isomers 03 || Number of Geometrical Isomers JEE MAINS/ NEET kzfaq.info/get/bejne/i9GppcWh2p-dnZ8.html Isomerism 09 || Opical Isomers 01 || Introduction : Chiral Centre and Enantiomers JEE MAINS / NEET kzfaq.info/get/bejne/kM-Arcp4u7Copo0.html Isomerism 10 || Optical Isomers 02 || Plane of Symmetry and Centre of Symmetry JEE MAINS /NEET || kzfaq.info/get/bejne/aLKRl8J3tp2vYqs.html Isomerism 11 || Optical Isomers 03 || Enantiomers , Diastereomers, Meso , Total Isomers JEE/NEET kzfaq.info/get/bejne/ocx9h9KAvc7Uip8.html Isomerism 12 || Optical Isomers 04 : Wedge Dash and Fischer Projections with R-S Configurations kzfaq.info/get/bejne/g9CXocViqbuXfHk.html Iomerism 13 | Optical Isomers 05 | Optical Isomerism in ALLENE , SPIRO and BIPHENYL JEE MAINS/ NEET kzfaq.info/get/bejne/lc57ZZCI0Lilf2Q.html

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For those who are confused, at 1:02:31 the sulphur is not a chiral centre as it has two oxygen atoms attached to it. Sir made a mistake here

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Timestamps: 9:32 Polariser 11:45 optically active substance 19:05 Dextro rotatory leavo rotatory 21:55 specific rotation 23:44 😂 25:00 how to know optically active substance 26:44 😅 31:15 😅 34:00 example lactic acid 39:50 enantiomers 44:00 chiral centre 1:04:00 chiral centers no rule

At 1:02:30 HSO4CH3 me do oxygen sulpher se judi hai vo kaise chiral center hoga sir

kush rakhna us maa ko humesa jisne hum garib bacho ke liye alokh sir ko janm diya is dharti me ...👏👏👏👏👏

1:02:46 sir it(sulphur) cannot be chiral centre bcoz it has same atom that is oxygen on both sides (up and down)

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My teacher has started and ended up Optical Isomerism in 30 min and I Cant able to understand Properly at depth.Now Im satisfied.God will bless you sir.Your are great and helpful

Who dislike the video Bas itna kehna hai kisi kabhi achha nhi Kar sakte toh bura bhi mat karo Alakh sir love from jharkhand

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when this was uploaded I was a student in 12th, today I am watching it as a teacher to guide my first student. sweet memories can be derived from anywhere, love you sir, aapne jo kar dia no one can do in this world. We are ready and too much glad to say we may not have Elon Musk or Warren Buffet, but we have Alakh sir, that one percent. love you sir.

You've changed the meaning of chemistry for me . Excellent teaching.

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Old is Gold 🏆✨

At 1:02:40 , how are the four groups different ?? 🤔 Double bond OXYGEN to same hai SULPHUR pe, upar bhi & neeche bhi OXYGEN, to phir different kaise hua🤔 please explain Sirji🙏

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At 1:02:30 listen the lecture carefully........ It will be a superimposable image.. Sir ne bola hai ki 1.pehle compound ki mirror image banao..... 2.Or phir first compound (jiski mirror image banayi hai) usko 180° rotate karo ..... 3.Or phir check karo ki wo imposable image hai ya nahi.... And iss hisaab se sulphur wala compound imposable image banayega or optically active nahi hoga..... And we can clearly see that.... Sulphur is bounded with two same atoms which directly shows that the compound has not any chiral centre and thus optically inactive .....

Aaj jab mai 12th me aa gai hu to mujhe feel ho rha hai ki sir ke ye lecturers kitne important hai, sir bdhiya optical isomerism kisi ne nai samjhaya hai. Ye char lectures ki value bhut jyada hai . Aap best ho sir , thanku so much🙏🙏🙏🙏

1:02:41 how is this chiral, sp3 thik hai par valency 4 diff atom ne satisfy karni chaiye na, isme 2 oxygen hai sulphur pe

This lecture is three years old but now it has more value then before OLD IS GOLD 🙂

*guys plz...appreciate what he uploads...stop saying ...sir ye krwado sir wo karwado..sir kitni mehnat krte hain..so plz first focus on what he teaches...by the way love your teaching methods a lot sir..salute*

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1:02:52 It is surrounded by O on both sides. So it can't be a chiral centre. Please clear it.

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Thanks sir for discussing the chapter so in depth

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1:02:21 isme =0 two times h .....do same atoms hain... Toh fir ye molecule chiral kaise hua????

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Chira Centre ki contion:-----1. The Atom should be sp3 hybridized 2. "4" Valency different grp/atom se satisfied ho. Then in case of that SULPHUR at 1:00 the given valency of sulphur is 6 in compond But out of the 6 valency , 4 VALENCY is satisfied with different grp or Atom. THEREFORE IT IS CHIRAL CENTRE

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Sir in sulphur example there are two same atom so why optically active it should be optically inactive

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At 1:02:30 H2SO4CH3 me sulpher se 2 oxygen jude h, vo kaise chiral center hoga

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OLD IS GOLD AND GOLD IS NEVER OLD

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