Bihar Board Class 12 Chemistry | Basic Organic Chemistry Lecture 5 | Hindi Medium | Deepak Sir | Int

[00:00:26]Mithilesh good evening good evening everyone come on come on how are you Mithilesh tell me how are you fine are you alone today has no one come yet are you alone come on come on Mithilesh tell me how are you?

[00:01:02]Tell me once quickly.

[00:01:05]Everything is fine, right? Are you understanding the class?

[00:01:14]Mithilesh, come on, see how many classes we have attended so far.

[00:01:50]Look, before this, four lectures had already been conducted and today's class, today's lecture is the fifth lecture. Ok? And see what we have read so far.

[00:02:05]Look what all you have learnt. Ok? Just look at that. First of all we learned that carbon forms GO bonds. So we told that carbon forms four go bonds.

[00:02:18]First thing, second thing, what bond does hydrogen form? Creates a bond. Ok? Then he asked, what is the representation of an organic compound?

[00:02:45]How many ways is it represented in organic compounds?

[00:02:48]So in this we had said that it is represented in three ways. Ok? In how many ways is it represented? three ways.

[00:02:58]One is the structural formula. There is a way to represent it. Which formula? Structural formula. The second method was condensed formula and the third was closed linear formula.

[00:03:38]Ok? These were three ways we can do organic compounds.

[00:03:44]can be represented.

[00:03:47]Ok? What are three ways we can do organic compounds?

[00:03:53]can be represented. Ok? Come on, who all are present?

[00:04:23]Okay, let's see, these were three ways by which we can do it, everyone come quickly, okay, everyone has come, why do you make me wait so long, Dilakh, good evening, good evening, Dilakh, tell me, okay. Hello hello hello hello everyone, come on good evening good evening good evening Kumar, come on everyone, please like the class once, okay, share it also. Ok.

[00:05:47]Do you want to taste Dilakh tea? Let's go, Dilakh.

[00:05:58]Yes equality pride. Come on Gaurav, we are here. Okay, good evening, good evening Gaurav, do you remember the last class, tell me, do you remember everything?

[00:06:46]Say it quickly, write it in the chat box once, do you remember everything from the past?

[00:06:54]What did you teach in the last class?

[00:06:57]A K M Army Boy Hello Hello A K M Army Write your full name So A K M Army Boy Write your name once Original Sushant Good evening Good evening Good evening Sushant Do you remember the previous class Tell me once quickly Do you remember everything of the previous class Yes okay Gaurav Do you remember Let the others also speak Akash Kumar It's okay Akash ok Sushant You have eaten and drank, right Sushant Let's start today's class Pradeep Good night sir Good night Pradeep Good night let's start Let's see what we had studied in the previous class If you remember, let me remind you a little bit ok In the previous class we had studied hybridization and what did he say See once everyone pay attention He had said it very well First find out what is the hybridized orbital First find out the number of hybridized orbitals Number of hybridized orbitals and how was it worked out? Sigma bond addition Sigma bond addition Lone pair. Look, lone pair is called lone pair in Hindi.

[00:08:52]Lone pair. Leave Hindi.

[00:08:55]Remember this in English. It was said that if the number of hybridized orbitals is two then the hybridization will be sp. If there are three hybridized orbitals then the hybridization will be sp2.

[00:09:09]If the number of hybridized orbitals is four then it will be sp3.

[00:09:15]Tell me, okay, from what time to what time do I teach, look Akash, we teach you from 8:00 to 9:00 and from when to when, from Monday to Friday, Friday, Saturday and Sunday are off.

[00:09:36]Ok? Did you understand?

[00:09:44]Now let's get back to this.

[00:09:47]Timing 8 to 9:00 pm. Correct? Look, we had already read this. In the last class. Some examples were also given. What something? A lot of examples were given. Well, the topic of hybridization is very important.

[00:10:03]Everyone should remember this. Ok? It comes in many exams. Ok? Whatever we read today, whatever we read today, what else will we read beyond this? This is a very important matter. It is also a very important topic. Ok? So, look what you read. Today's class. We will study this in today's class.

[00:10:28]What will the alkyl group read?

[00:10:32]Alkyl group and very carefully when we teach IUPAC name, whether it is IUPAC name or organic, it is going to be very useful.

[00:10:43]Good evening Vikas. Good evening. Good evening everyone. Sky.

[00:10:48]Ok?

[00:10:51]Good evening to all those who have just arrived. Now we have to study alkyl groups. Look carefully. is very easy.

[00:10:56]Organic is very easy. It is not difficult.

[00:10:59]People just make it difficult.

[00:11:03]Whatever you are, this is something basic about you, which remains weak, due to that it becomes weak. And this is not difficult.

[00:11:10]Ok? It's very easy to go organic. It's very easy.

[00:11:12]If you read it carefully then it will be very difficult, Babu.

[00:11:19]So organic is easy. But when? When you know the basics. Ok? We will try to do the very basics. It cannot get more basic than this. Ok? So we will start with the basics. So basic that it is impossible to be more basic than this.

[00:11:32]We will try to teach as much basic as possible.

[00:11:35]Alkyl group and what do we refer to this alkyl group?

[00:11:41]From R. Everything will be understood later. What does R mean? What do you mean? Everything. Ok?

[00:11:46]What is the way to inform this? R. Ok? We write some things here.

[00:11:52]Ok? Now everyone has to remember this once. Look, if carbon carbon if one, carbon if one, we write it like this.

[00:12:06]Look, if carbon is one, here we will write the number of carbon. The number of carbons and here we write word root word root, now you have to remember this thing. Ok? Number of carbons and word root and if the number of carbons is one, it means if there is one carbon, for this the word root used is meth. What word is used? Meth.

[00:12:39]Ok? If there is two carbons then it is used for this. ETH. You must pay attention to spelling. And if there are three then it is prop.

[00:12:52]If there is four but.

[00:12:57]If there is five then there is paint. And if it is six then it is hex. And if there is seven then it is hept.

[00:13:13]HEPT is Hept and if it is eight then it is Oct and if it is nine then it is Non and if it is 10 then what is Dec, all of you should definitely remember this in your mind properly Gautam Kumar Hello Gautam, come on everyone, please remember this properly that what is meant for the number of word root carbon.

[00:13:42]Ok? Yes Gautam, it is done, right?

[00:13:45]How many times will you write it? Please pay a little attention to the topic.

[00:13:47]Concentrate on your studies, Babu. Reading is more important than the rest of this chat. Ok?

[00:13:52]Chat Babu is not important.

[00:13:55]What is important? Reading. Therefore, everyone should look very carefully. Don't pay too much attention to chat.

[00:14:00]Ok? Because look, do n't waste so much time chatting. Isn't it? I have to study. Ok? Reading is very important. Isn't it? The time you are having right now is a very important time Babu, if you waste it then it will be very difficult in the future, that is why everyone should concentrate on their studies carefully, what should I tell you, do you understand the matter, come on you have understood, come on, you are such a good child, the number of carbon and here we have written the word root, when the number of carbon is one then what is the word root for it, if the number of 1st carbon is two then it is the word root, if the number of 1st carbon is three then what is the word root? Prop. If the number of carbons is four then it is but. If the number of carbon is five then it is pent, six is ​​hex, seven is hept, eight is oct, nine is nona and 10 is dec. Everyone please remember this thing once quickly. Ok? It's done Gautam.

[00:14:57]No problem. Learn from your mistakes.

[00:14:59]Ok? And we are on your chat, please take out a banner and show it on the chat, sir, please go out and look at the terrace, are you guys watching from the terrace, but we are watching you from the terrace, you go ahead, no problem, no problem, let's read it, you will remember it a little, tell us this once, everyone will remember it. Okay Gautam, no problem. Come on, now everyone, listen to how to do it.

[00:15:37]One thing you will remember is this. Will you remember this? The second thing we are telling you to remember here. The second thing we are asking you to remember is this. Let's write a little bit of that here.

[00:15:48]We will write that later on the next slide. The second thing we are saying is that if there is a single bond, what should you do? ANE has to be applied. What to apply?

[00:16:06]What should be put after the word root if the entire compound contains only a single bond? NE and if there is a double bond then put E NE after the word root and if there is a triple bond then you have to put V NE, keep these two-three things in mind. If the single sir word root is remembered. Ok. That's a good thing. Ok. very nice. Isn't it? If there is a single bond then A N E. When to apply?

[00:16:34]Just after the N word root. If there is a double bond then E N E. Triple bond is and N E. When is this applied? Always after the word root we are also.

[00:16:45]Sir chat on the roof. Okay, why are you writing chat on the terrace? Come let us read now.

[00:16:51]Everyone must have remembered it very well and they should remember it very well. It is very important. Look carefully. Now the alkyl group.

[00:17:01]Now we write the alkyl group.

[00:17:06]Now everyone please look carefully.

[00:17:10]Leave all the chatting and concentrate on the entire board.

[00:17:13]See what we do now? How is alkyl group formed? So look what happens is if you listen to Alken.

[00:17:28]If you remove one H from the alkane, what do you remove? Tell me, if you remove one H from the alkane, then it becomes what for you, it becomes an alkyl, keep it in your mind immediately, if one H from the alkane, sir, online, you mean, your app is online, yes, absolutely Gautam, it is online also, the name of the inter class, the same is the online app, okay, you can download it from there, you will get all the notes, notes, okay, come on, come on, yes, pay attention, pay attention, understand this by the name of the inter class, Gautam, come on, which group, alkyl group, what did you say, first keep it in your mind, if we remove one H from the alkane, what will be formed? Alkyl. What will be formed if one H is removed from an alkane? Alkyl. Did you remember? If one H is removed from the alkane, how much will be the payment? Ok? If you see, you only have to take chemistry. If you want it then it will cost you Rs 499.

[00:18:46]Ok? If you want to buy the whole thing, it costs Rs 999.

[00:18:51]Download the app once. Go there and see, everything is written clearly. You will immediately understand what the matter is. Ok?

[00:19:00]You will see what facilities will be available there. What will remove H from an alkane?

[00:19:03]What will happen if we remove H? Alkyl.

[00:19:05]And now let us tell you how will you inform the alkyl? From R. How will you inform? From R.

[00:19:12]Tell me, did you understand? This makes sense, right? Now let's take an alkane.

[00:19:17]What do you take CH4? CH4 Everyone pay attention what do we do with CH4? Let's remove one H. One H is removed from CH4.

[00:19:28]So what will this become?

[00:19:31]This will become CH3 and one bond which has gone empty, leave this empty in its place.

[00:19:37]Ok? Char Go H was. If one of the four cows is gone, what is left? CH3. Now let's write its name. Let's look, let's write the name.

[00:19:45]What will its name be? So its name will be what carbon, see this is Eko carbon, just pay attention here what do you write in Ego carbon, word root, tell me what do you write, word root, what do you write, tell me what do you write, word root, look, it is written as myth, right, come tell me what will you write here, we will write myth. What will you write? I will write a myth.

[00:20:21]Correct? And if we show you how to make it like this in CH4, then are all the bonds in CH4 single-single? There's a bond is n't there? And when a Bond is All Subject 999 right? If there is a bond, then look at what you taught me for a bond. What happens to a bond? an N is a bond, so what do we write here? I will write N E.

[00:20:49]Tell me, did you understand this? If there is a bond then we will write NE. And you have removed one H from here, so see what will be added to its name? Like this was if you look at this, if you look here then it is N E. Isn't it?

[00:21:04]What has been replaced by NE? YL has been installed. What will happen here too?

[00:21:09]What will you replace NE with? I will apply YL. I mean what will happen? It will become methyl.

[00:21:13]Everyone has to write in English only. It will become methyl. What will happen if N is removed from methane? L will be applied there. So what happened? It got methylated. What is your name? The name became methyl. Ok? Akshay is Akshay, right? Okay, fine. And see the example.

[00:21:33]And see examples. If suppose we write this here CH3 CH3, if we write this, is that carbon one carbon here, is there an octane carbon here and we have to see between carbon and carbon, is there a single bond or a double bond, we have to see between carbon and carbon, is there a single bond or a double bond, so tell me, is there two carbons, so what will we write for two, eth, and if there is a single bond, then what do we use, say ethane, and if we remove H from here, now you can remove H from here also. You can remove it from here also.

[00:22:08]Both carbons are the same. Sir, I have bought a new shirt. Did not throw a party.

[00:22:16]Which new shirt? Do you like this new shirt? It's a very old shirt from somewhere.

[00:22:23]What is? Ethane. Suppose we remove H from here.

[00:22:26]So if we remove H from here, what will we see? Look, CH3 CH2 and from where H went, it became free, now what has happened to it, it has become free, so look at its name, we will remove AN and what will we put, we will write its name like this, ethyl, what will we write, ethyl, let me tell you one more thing, how can we write this thing, should we write this thing like this, if there are two carbons then what should we write, can we write C2, see and what has happened to H, three and two is 5, can we write it like this? C2H5 and it's free. You can also write it like this. Many times you will find it written like this. It is written ET. The first two letters are taken. Took E and T.

[00:23:12]And what happened? ET is done.

[00:23:15]Ok? And sometimes if you look at methyl, you will find it written like this. M.E. will write it. I will write it down. Say me me of methyl. Done.

[00:23:26]Everyone understood. That's ok.

[00:23:30]Everyone please like the class. Ok?

[00:23:33]Everyone please like it. Ethyl Yes, that's right.

[00:23:35]Keep writing ethyl methyl. Ok? Let's move on. Let's move ahead. Let's move ahead. Let us go.

[00:23:48]Look at the next thing. Look at the next thing, everyone. Let's take three carbons. Now look how much carbon is there now? Three carbons. Look at CH3 CH2 and CH3 CH3 CH2 CH2 take the word root as per the number of carbons present. Yes, of course, should we write its name first? See what carbon? One go, two go, three go. So what is a three carbon word root? There is a prop.

[00:24:23]What is the word root of three carbons? Prop.

[00:24:25]And since there is a single bond between carbon and carbon, what will we write? What will you write? N. Now let's now let's remove H.

[00:24:35]H if removed. If we remove H then we can remove H from here and remove it from here also.

[00:24:42]Both are the same. If you remove it from here, something different will be created. We will learn that later. Ok? So tell me what did you make? This made CH3 and what happened? CH2 And what happened? CH2 has removed one H so we will leave it free.

[00:24:58]So what will be its name? Its name will be Propyl.

[00:25:04]What will be the name? Propyl. What will be the name? Say. Sir, I did not understand. What did you not understand? Tell me once. Tell me once Pradeep, what did you not understand, you will tell me again, no problem, there is no hurry, study comfortably while understanding yourself, what is the use of studying if you have not understood at all, then it is important to understand, we will explain also, you do not have to worry about it, Krishna Kumar Sir, my message is not seen, hey Krishna, how can we leave your message, we will see your message also, Ankit Raj, hello Ankit, come on, what were you messaging, just do it once, one KM, yes, okay, what you are telling is okay, propane propyl, yes, okay, Krishna, you are okay, you have written it absolutely correctly, then why will we not see your message, absolutely, yes, look once again, Pradeep, as much as the carbon will be there, Pradeep, we have said this for you, take the word root as much as the carbon will be there, see once, as much carbon will be there, if we assume that one carbon will be there, then myth, this word root has to be used. Ok? eth for two carbons, prop for three carbons, but for four, pent for five, hex, hept, oct, nonce and dec for six. Jaggo Carbon has to take the word route accordingly.

[00:26:29]Word root according to whom?

[00:26:33]Wake up according to carbon, carbon wago, look for that carbon, what is the word root.

[00:26:39]Ok? What is the word root for that carbon? So that has to be seen. Ok? Did you understand the matter? Sir, please repeat it once.

[00:26:49]What thing? Did you say it again? Look, we said it again. Like look, this is an alkane. We said we'd like to hear from Alken again. If you remove H from alkane. Do you remove the H? You remove one H. So what becomes of it? becomes alkyl. What do you denote alkyl? You do it with R. Like here if we take the example of CH4 then what is carbon, look here is it carbon? Ego So what is the word root for Ego? Meth and single bond is so ne So if we remove one H from it, remove one H from it, what will happen? The myth word root will remain the same. What will you just replace NE with? I will apply YL. The word root remained the same. What did you remove NE and put it in? I applied YL. We can inform this like this also. You can inform me through M. You can inform me through M. Ok? Ok? Second from me, look how much carbon is there here? There are two carbons. Look how much carbon is there? There are two carbons. So what is the word root for two carbons? This happens. So what does the word root for two word two carbon become?

[00:27:54]Eth. So what should I write? Look, Ethan. What to write?

[00:27:56]Ethane. Wrote it down. H Remove either remove from here or from here. So when H was removed, it was left again. So what is its name?

[00:28:04]Look, it will remain here. The word root does not change.

[00:28:06]What should I write after removing the last 'N'? Sir sometimes your video gets blurred.

[00:28:13]Well, is that the case?

[00:28:17]Ok, good. Let's see what improvements can be made. Let me finish the class today and then we will see further. Ok. So let's say there are two carbons, so what is the word root for two? This happens. If there is a single bond between carbon and carbon, what will you put? N. What will happen if we remove H? Ethyl. We said you can write ethyl like this C2H5 and this can also be a way to represent ethyl.

[00:28:43]Tell me, did you understand this?

[00:28:48]Tell me, is this clear to everyone? Is it crystal clear or not? Tell.

[00:28:54]So crystal clear to everyone? Say it once. It's all clear till here, right? Let us go. Till here, probably everyone is completely clear.

[00:29:06]Let's move on to the next thing. Look at it and tell me if there is carbon in it. There are three carbons. So what did the word root say for three carbons to remember?

[00:29:18]Now I understand. Ok, good. If you do n't understand, please explain a little. Okay, right? When you don't understand, everyone should write in the chat that sir, I did not understand.

[00:29:30]Repeat it once. So we will repeat it. Isn't it? We don't have any problem.

[00:29:34]Ok? Because look, my job is to teach and not only to teach but also to explain. Ok? Because who owns the whole game? Of the one who explains. Isn't it? So, if there are three carbons, what word root will we use? Propane. What will you use? What do you write if there is a prop and a single bond? NE. If you remove H, then see what should go on in your mind after removing H? Well, remove the N and replace it with NE.

[00:29:59]Put the vial. Say. Ok.

[00:30:02]Let's move on. N has to be removed and vial has to be applied. Let's see another example.

[00:30:09]So we write this. CH3 CH2 CH2 and CH3 Let's name it once, what should I write? So let's see what carbon is. If Kyago is carbon, what is carbon? Four go so remember the word root what is four carbon?

[00:30:34]Put there is a single bond, look from here to there there is a single bond, so what will you put?

[00:30:41]What do you use for a single bond? N what to do now? Remove the H. What to do now? Remove the H. H Suppose we remove him from here.

[00:30:52]So we are removing it from the side only. We will remove them from the middle later. CH3 What happened next?

[00:31:01]CH2 What happened next? CH2 And then what will be left?

[00:31:07]In the end, what remains is CH2 and its valency is absolutely free, that is one bond free. So what will its name be? Will remove AN. What will they add after removing AN? Will add vial. What will you add after removing N? Will add vial. So tell me what will happen?

[00:31:22]Butyl. What will be the name? Butyl.

[00:31:26]Come on, tell me what is clear, tell me once, everyone is clear till here, say it quickly, everyone is clear till here, it is completely clear, right, let's move ahead, let's move ahead, yes, let's move ahead, okay, okay, okay, it will be butyl, it is absolutely correct, let's move ahead, pay attention to this, now what do we do? They write this. CH3 CH2 CH2 CH2 Is carbon done? Four one became five. Let us write CH3 here. Let's all write in the chat box.

[00:32:18]How much carbon is its name?

[00:32:21]Five. So what is the word root for five? If there is paint and a single bud, what will you apply? Pentane. H Remove from the side. H has to be removed from the side.

[00:32:30]H removed from the side. What will happen when H is removed from the side? See.

[00:32:37]CH3 CH2 CH2 CH2 3 1 4 and CH2 What will be its name?

[00:32:51]What will its name be?

[00:32:54]Its name will be Pentile.

[00:32:57]What will be the name? Pentile. Say. Tell me, is everything clear till here? All these people had written it down.

[00:33:04]Yes, that's right. Press video is not happening. Krishna Press video is not happening? Tell the rest of the people also once. Is it getting blurry?

[00:33:19]Wait a minute. Aarti you also come we have to study tensile, okay is it blurry like this in the middle, okay sir pay a little attention to the video, it becomes completely blurry, oh it is completely fine right now, where is it becoming blurry, now see, now maybe it will be fine, it is happening, everything is happening, now check it once and tell me once, now tell me once, okay sir ji we are a little late, okay no problem Rupesh, no problem, it is not getting blurry now, check it once, okay okay, okay, it will not happen sometimes, that will not happen either, okay now see, now you have understood this, tell everyone till here, it is correct, yes yes okay. Shall we proceed further now? Say it once. Let's write something else.

[00:34:28]Now pay a little attention. Ok? Now look, let's bring in the double bond once.

[00:34:33]Ok? Well, let us tell one thing to everyone.

[00:34:35]Ok? One is alkane.

[00:34:39]What is one? Alkene.

[00:34:44]Ok? One is alkane.

[00:34:48]One is alkene.

[00:34:52]hydrocarbons are telling. What is one? Alkene.

[00:34:56]And one becomes your alkyne.

[00:34:58]Because this will be useful again and again, we will tell you about it. Alkynes.

[00:35:07]Everyone pay attention for once. Sometimes you are asked small questions on this.

[00:35:12]Ok?

[00:35:14]Small questions are asked of you.

[00:35:16]So pay attention to this. Ok? Look what does alkane mean? Whenever you hear this alkane, whenever you hear this alkane ethane, methane, propane, butane, iken, lichen, flocan, what all have you written?

[00:35:43]Okay Pawan Okay Pawan Okay so what does alkane mean?

[00:36:02]single bond between carbon carbon which bond between carbon carbon which bond between single bond carbon carbon? Single bond. Ok? Now you have to remember its general formula, its general formula. From now on, if someone asks you to tell me what is the general formula of alkane?

[00:36:30]In English it is called general formula. What do you say in English?

[00:36:34]General formula. And do you know what it is called in short? EF speaks. Ok? GF means don't understand anything. Ok? Do n't make up your own mind. GF means General Formula.

[00:36:49]Ok? We didn't say anything. We just said general formula means general formula.

[00:36:56]We will not have to write that much short vega. So everyone has to remember its general formula.

[00:37:00]Its value is CN H2N + 2 CN H2N + 2 Yes, let's see now what is N here? Here N is the number of carbons.

[00:37:20]What is n? Number of carbons.

[00:37:25]Correct? And what will be the value of n? The value of n will be 1 2 3 4 dot dot this can go up to infinity.

[00:37:36]Ok?

[00:37:39]We will make your general formula, you are a prince, see what meanings are coming out.

[00:37:47]Cumin fry okay let's go and see okay. The cumin fry is good. Isn't it? Let's see what an alkene is. So alkene means which bond between carbon and carbon? Double bond.

[00:38:03]Which bond is between carbon and carbon? Double bond. Ok? Which bond is between carbon and carbon? Double bond. Ok? Of carbon. Let's see. No, him. This does not happen.

[00:38:21]Now tell me what will be his girlfriend? Hey general formula same formula. So see what to do with this, subtract two from this, subtract two from this, okay, subtract two from this, we will subtract two, so remove these two, so what happens, cn h2n, okay, did we also say it today by mistake, okay, it was said, so what can we do, pay attention to the value of n here, the value of n will be 2 3 4 dot dot means this 5 6 7 8 any one, okay, let's remember it, let's subtract two from it, what does alkyne mean, alkyne means triple bond between carbon carbon, alkyne means triple bond between carbon carbon and its general formula will be this, CN H2N and -2 CN H2N -2, okay? And what will be the value of N here also?

[00:39:37]What do some people think? Look, let me tell you one thing.

[00:39:38]Some people think that there is a single bond here, so what is there here? N started from one. And then it will think that if there is a double bond here, then it started with two. Here, if there's a triple bond, it starts with three. No. This is not a mistake.

[00:39:54]Here also it will start from two only.

[00:39:56]Here also the value of n is two 3 4 and so on.

[00:40:01]This will be kept in mind.

[00:40:06]When does a double bond occur?

[00:40:09]What did you say? When does a double bond occur? A double bond occurs when two atoms share two electrons.

[00:40:19]Then a double bond is formed. Did you understand?

[00:40:25]When two atoms share two electrons. When two electrons are shared, a double bond occurs.

[00:40:32]Will form a partnership of three. Look at the three of them, three will make a partnership like this. If one partner is involved then one.

[00:40:40]listen again. A bond will be formed by partnership of one.

[00:40:43]Shared one electron each. If one electron shares two electrons, then if three electrons share three bonds are formed. Right Pawan? Yes, okay Pawan. Let's see, this is clear, right? Say it once quickly. Is it clear or not? Tell.

[00:41:02]Now let's talk about it. Okay, let's see one more thing once. Sometimes you know he will ask you another question. Let us come back to that. Starting from where we started. Where did you start here? Yes, come on, everyone pay attention.

[00:41:15]Everyone pay attention once. You know, you will be asked one thing, what will be the general formula of alkane? Tell me, tell me right now, tell me the general formula of alkane.

[00:41:32]cn h2n + 2.

[00:41:38]Someone please tell me this. Someone please tell me, what will be the general formula of alkyl? Let's see who you can get right.

[00:41:46]You have to write this in the chat box.

[00:41:52]What is the general formula of alkyl? What is the general formula of alkyl? Say it once quickly. Let's check again. Let's see who gets the correct answer.

[00:41:59]What is the general formula of an alkyl? Write it quickly once.

[00:42:05]What does everyone say chat means? Everyone must like the class. Isn't it? Please share it in your group also. Ok? Do it wherever you want. Ok? Let us go.

[00:42:17]What is the general formula of an alkyl?

[00:42:19]Tell me quickly.

[00:42:23]Tell me quickly once.

[00:42:25]What would be the general formula of alkyl? Let's see who can answer.

[00:42:27]quickly.

[00:42:30]What would be the general formula of alkyl?

[00:42:32]Sir, please speak in English. Krishna, you study in English, poor guy is from Hindi medium. Isn't it?

[00:42:40]Yes, that's why I should say this in English only, what is the general formula of alkyl? This is what we said, tell me CNH2N is wrong. Wrong answer, tell me someone else, tell me someone else CN H2N no, it is wrong, no, tell me someone else, please tell me the correct answer Gaurav, you tell me, it is correct Samata, you tell me Pradeep, no, it is wrong, no, no, tell me the general formula of alkyl, you have to tell me the general formula of alkyl, tell me someone, then what happens sir, what have you written sir?

[00:43:48]What are you writing when you get more likes?

[00:43:51]Dharmendra Kumar Singh Hello everyone I am Mandira Kumari Mandira Kumar, yes tell me the answer first we will answer Mandira answer answer answer tell me quickly no answer for alkyl group has come yet, right let me tell you, will you look carefully Rajkumar Cn NH2n, yes Rajkumar how do you know this, you have told this correctly, look this is Rajkumar, look everyone, look this is from 11th class, look I have told the answer, you guys are in 12th, you could not tell, it is wrong, right let's look, listen, think, think, look here, listen as much as carbon, once you listen, they will tell you how to arrange the formula, look what carbon is, it is one. Now think about how much more than twice the carbon is this? Tell me how much more than twice the carbon? Is n't two too many? That's why you don't write it CN H2N +2, that's why you don't write this. So look here, how much more than twice the carbon is there? Please tell me. So if carbon is one, how much H is there?

[00:45:18]So multiplied by one, we write it here CN H2N + 1, see this is the formula, so what is the general formula of alkyl CN H2N + 1, let us apply it to the rest and show you, let us see here what is its formula, so if we write it like this, will it work or not, see what carbon it is, three carbon H, what happened? 3 2 5 and 2 7 H is seven or not? So let's look at how much more than twice the carbon? Look, 3 * 2 = 6 is one more than twice a 7 carbon.

[00:46:04]So what is its formula? CNH2N + 1 Now if anyone ever asks you Sir, this will be it Sir. But its source Krishna Sir, how are you?

[00:46:26]How are you? Did you feel good this morning or not? Did you enjoy class this morning? Tell me Krishna, how did you like your class today? You must have enjoyed today's class and what about me Krishna, tell me how are you? Tell. What should we say? you tell. Come on, will you remember? Did everyone remember? I remembered it. From now on, if asked, tell me what is the general formula of alkyl? So what to say?

[00:47:01]Remember HCNH2N + 1?

[00:47:05]Say. Did you remember? Did everyone remember? Let us go.

[00:47:12]This is an important matter, Babu.

[00:47:16]This is important. This is where it makes you make a mistake.

[00:47:19]Ok? The class was good. Okay, fine. very nice. very nice. Well, you guys are answering very well. Isn't it? Let's move on.

[00:47:33]Tell me the next thing. Now let's do this now. Let's do this.

[00:47:37]Now let's bring in the double bond.

[00:47:40]Like these CH2 and CH2 let's CH2 and CH2 CH2 and CH2 is carbon? Will you tell me a little? There are two carbons. So can you tell me what word is used for two carbons? Eth.

[00:47:58]What word is used? Eth. And if it is a double bed then what will you apply?

[00:48:03]N had told me what to put for double? NE has to be applied. What to plant for double? NE has to be applied. So what happened? Ethene, remove one H from it. H removed. If you assume Eko how much? Eko so what will this look like?

[00:48:21]CH2 double bond CH and aco bond got freed.

[00:48:27]Where we remove H, we remove H from here.

[00:48:30]Look at its name. So what to do now? Now you have to keep this in mind that when the double bond or triple bond comes in it, then just remove this last one, which one is the last one, which one is the last one, remove this last one and put YL in its place, so what happens, write eth and also write en and what do you put after removing the last i, YL, what happens, what happens, ethynyl, why should you write it? That's ok. If we forget this formula, we will be guilty of sin. Yes, it will definitely work.

[00:49:09]Why won't it work? It will take.

[00:49:13]Yes, let's go. Okay, so far so good. This made sense. Ethyn and what happened? If H is removed then it is ethane.

[00:49:22]Let's move on.

[00:49:25]If we write like this. watching the. If we write like this, what do we write CH? CH and three go bud and then what do you write? CH draws out an H.

[00:49:39]What will happen if we remove one H? Look, if we remove one H, what will this become?

[00:49:46]CH Triple Bund C and one got free. Will it be named?

[00:49:55]What do you apply for eighth and triple bond?

[00:49:58]V N E and then what should I say, in double or triple, just remove E, in single one, remove N only, then E will be removed in this, it will become Eth V N and after removing the last E, what will be added, so see what has happened, Ethynyl Ethynyl Ethynyl, say it is clear till here, say it is clear, it is clear, let's move ahead. Now let's talk a little more.

[00:50:34]Ok? A little talk. Now let's do this next.

[00:50:37]Now we have to learn how to find the degree of carbon? Bubbly new student Guruji. Name: Chulbuli, what kind of names do you people keep? Is n't it bubbly? Come on new student. Okay, I have seen the new student. Okay, write the original name.

[00:51:00]Chulbuli.

[00:51:01]Write the original name. Chulbuli. I have to write the original name. I am the new student in your class. Adhira.

[00:51:12]Okay, welcome to this class.

[00:51:18]Chulbuli. Write your name.

[00:51:21]Chulbuli.

[00:51:23]Okay, now whatever we are going to read, watch it very carefully. Ok?

[00:51:29]Chulbul Pandey Chulbuli Pandey is fine. Ok.

[00:51:35]Ok. Okay, fine. Chulbul Pandey, well there used to be one Chulbul Pandey, he was the one in the cinema. Let's make this much hole. It was something like this about Chulbul Pandey. Do you remember that thing? They will make so many holes that you will get confused as to where to breathe and you know the rest of what will happen next. Isn't it? Okay, remember that Salman Khan thing, he will pierce Pandey so much that you will get confused as to where to breathe and we will not say anything else. Ok? So what happens now? The next thing we will read is this. This is a very important matter.

[00:52:24]degree. The next thing we will read is Degree of Carbon.

[00:52:34]Degree of carbon. Well, some more things are left. He also teaches first. Ok? There is something else, it is important to understand it a little.

[00:52:47]Let's clear that first and then come to this. Now look, there is one thing which is so important that what can we say about how important it is. One is normal.

[00:53:00]One we have to study normal.

[00:53:04]One reading is Iso.

[00:53:07]And one reading is Neo. And here we put the group. So we will understand three things now. Ok? Everyone look very carefully. Whoever is present, watch it till the very end. It is very important to understand this. I am not enjoying it. I am not enjoying it.

[00:53:28]What is going on here? It is not a drama that will be fun. Krishna, it is not a dance that will be fun. There is little to read. Isn't it? Isn't it? Let us go.

[00:53:39]So what? I have to read three things. One is to read normal, the second is to read iso and the third is to read neo. Three things have to be understood.

[00:53:50]Ok? Understand three things. So where do we start from? First let us read what is normal? What do you read first? What is normal? Normal.

[00:54:02]First we will read what is the meaning of normal?

[00:54:07]Normal Normal will be written like this from now on.

[00:54:12]How will you write it? Chhatka will write with N.

[00:54:14]Not the capital, not the capital. It's been a long time today. Please give me leave. Have to go home. I felt hungry.

[00:54:21]How much cheese did it take you? I have to go home too. I am missing home. Have to go home. I am missing home a lot. You come home a little late, some time ago, and immediately you remember home. Isn't it? That's ok. I will leave this topic after completing it for some time.

[00:54:43]Ok? This topic is complete. Class is over. Let us go. So this is what normal means. Normal means straight series. Normal means a straight chain of carbon. Normal means a straight chain of carbon.

[00:55:03]Straight chain of carbon.

[00:55:06]Straight chain.

[00:55:11]If carbon has a straight chain, what do we apply to it? For that we use normal.

[00:55:18]What do we apply for that? Normal. Do it first.

[00:55:26]What are you guys writing? Ok. Look, if carbon had a straight chain, what word would you use for it? Normal. And how do you write it in symbols? N. Ok? Like writing examples.

[00:55:41]Yes, this thing is applied to three carbons or carbons beyond three. So look, CH3, CH2 and CH3, tell me, is there any branch coming out of it? Is there any branch coming out? No, it's straightforward. So if it is simple then we can also say it like this, n means normal. Normal means straight series. What is a straight chain? Look, straight chain means that there is no branching. Let us write down its meaning. Ok? Some people are facing problems here. Straight chain means one in which there is no branching. In which you understand some branching branch, right? Branch There is no branch sticking out. Ok? There should be no branching.

[00:56:52]Ok? So straight chain means one in which there is no branching.

[00:56:57]Ok? Meaning in Hindi is Branching Meaning in Hindi is Branch. What does it mean? branch. Meaning, there is no straight line, no up or down, no branching out. Ok? No branch moved up or down. Just look at the example and assume that this is it.

[00:57:14]This is a straight series. But here you removed another carbon from here. Suppose one more carbon is removed from here. So it was n't a straight series. The branch came out here. The branch came out here. So it is not straightforward. This is not a straight chain.

[00:57:28]Ok? So we do not call this a direct series.

[00:57:31]So straight chain means one in which there is no branching. There should be no branches.

[00:57:36]Ok? So I understood the meaning of normal which is a straight series. Is this a straight chain? There is a branch coming out from any carbon or not. So what is carbon when it has no branches? Straight series. What is? That is a straight chain. That is called straight chain.

[00:57:53]Straight chain.

[00:57:56]We also add N to its name. N means what is here? N means normal. What does N mean? Normal. What does normal mean? Straight.

[00:58:05]Normal means straight. Straight chain. There are no branches protruding from it. So what will you write to this? Normal N will write propane. What will you write? n propane. And what would happen if we removed the H from here? This CH3 CH2 CH2, you can also call it propyl. There is another way. Write it like this. You can also write normal propyl n propyl or just propane and if you want, you can add one more thing to it.

[00:58:40]What does n mean normal, normal means straight, okay let's see the next example, suppose we take CH3 CH2 CH2 with four carbons here and put CH3 here, then what word will we use for this, firstly we can write butane. Another thing we can write is n-butane. Ok? What can I write now? Now you will say that I have read butane at the back. Yes, that is also fine. This is also fine.

[00:59:11]Both can be written as n-butane. n- butane. Ok. Now what is the difference between the two? We will tell you that in the end. What is the difference between the two? Ok. Stop. 1 minute. Is it time? Has it been 1 hour? It's 9:00.

[00:59:28]Gave leave. Hey, it's okay Sushant. I give you leave. Let me complete this.

[00:59:34]Ok. This is the last thing. Let me complete this. We will leave this last. N- butane will remove H. H if you remove it.

[00:59:42]Suppose H is removed from here, what will happen? CH3 CH2 CH2 and CH2 Now tell me what will you write for this?

[00:59:55]Write n butyl. What will you write? N- butyl. Now you will say when do we have to understand this? When should we understand whether to write this n or not? So see what happens?

[01:00:08]Now see what happens if you write n, this normal one is used to write normal names.

[01:00:14]When is this normal used? We will write it down.

[01:00:17]When is it normal to use it?

[01:00:21]Normal words are written like this. Normal word is used to write common names. Who can write the name? When we write common name, later we will teach what is common name?

[01:00:43]Used in common names. This is how I write.

[01:00:48]Used in common names. It is used. Ok? It does n't happen like this. It is not used in IUPAC.

[01:00:55]Not used in IUPAC.

[01:01:01]Not used in IUPAC. Tell me, does everyone understand till here? Say it once. Does everyone understand this much? What are you saying sir? Your head looks great today.

[01:01:17]Okay, thank you for this. Ok. Let us go.

[01:01:22]So did you understand this? When to apply N? N means straight series. N means straight series. Now you will ask what is its use? So let me tell you what the work is. For example, if you assume it will say to me like this, it will say to me like this n propyl n propyl n propyl chloride, write its name. Ok? And he will say this is the first name, we will create its structure there. The second thing he will say is, tell us what this is?

[01:02:04]Write n propyl alcohol and tell what photo and structure it will form? Now let me tell you. Please wait a little. And if I say I wrote it and said n propyl amine.

[01:02:21]Ok? When you read all these reactions later, you will see all these words in them.

[01:02:25]Ok? You will see all these words later on and see what will happen, Gautam, you have to concentrate on your studies, come and see, let us tell you one thing first, see, halogen is halide, see, halogen means X, halogen means X, okay. Now suppose if there is chlorine here then its name is chloro.

[01:03:03]What is the name? Chloro. If chlorine is present then what should I write, sir? Today you are in full ignore mood. Oh no Hrithik, where are you ignoring me? You probably just had a curry.

[01:03:16]So how can I ignore you? Ok.

[01:03:19]You came late, didn't you? Good evening Ganesha.

[01:03:22]Ok. Can't ignore it, right? That too to you. Ok.

[01:03:27]Wherever you go, do you get ignored by someone? Look, if there's bromine, okay, let's do something. This is how we write it.

[01:03:40]If chlorine is present, what name should be used?

[01:03:44]Chloro has to be used. If it is Br then what name should be used? Bromo. What to do? Bromo.

[01:03:54]And if there is iodine then what to use?

[01:03:58]Iodo.

[01:04:00]Now one thing later on when we teach functional groups.

[01:04:02]If the active group teaches, they will tell this. We will tell you now.

[01:04:08]If you see OH somewhere, what will you see? OH means alcohol.

[01:04:15]What happens? alcohol. And if you see NH2 somewhere, what does it mean?

[01:04:22]Amine.

[01:04:24]Ok? Keep some things in mind from now on.

[01:04:26]All this work is going to be very important in the future.

[01:04:29]So what is written? First of all, it is written that n is written.

[01:04:33]What does N mean? Straightforward. What does N mean?

[01:04:38]Straightforward. So we simply make three carbons.

[01:04:41]And at the end there is a vial.

[01:04:43]So let's write the vial first in the last.

[01:04:45]Make a photo of N propyle. N propyl CH3 CH2 CH2 What tell me first what do you understand that this is of N propyl only. Ok? Is this n propyl? Why n-propyl? Because there are three carbons, we will write prop and if one big echo H is gone, then we will put YLE propyl. And further it is written chloride. So what do you apply to chloride? Look, apply Cl. What should I put? Cl So this is the formula of N propyl chloride.

[01:05:22]Formula of N propyl chloride. Ok? Why turn off the light?

[01:05:27]Go ahead. The light dimmed.

[01:05:34]Nice cut is very nice. Okay, thank you. To notice this. Let us go. N Propyl Alcohol. Let's move on. Let's move ahead.

[01:05:45]So look, N Propyl came back. So N propyl means normal straight chain CH3 CH2 CH2 this is N propyl. What else is written? alcohol. So what did you say about alcohol? Have to remember this. OH remember that. When we teach active groups further, you will understand this.

[01:06:04]Ok? Look ahead. It is an amine. So what does en propyl en propyl mean?

[01:06:12]CH3, CH2 and CH2 what is this?

[01:06:19]If it frees n propyl then what does n propyl and amine mean? Look here, what do you add to the amine? NH2 is added. So this is amine. So, this way it is going to be very useful in the future.

[01:06:30]This way it will be very useful in future.

[01:06:34]Ok? Did everyone understand the meaning of normal or not? Tell me once quickly.

[01:06:43]Tell me once quickly sir, you are very happy about the college being allotted, right?

[01:06:50]Why not, I brought sweets, right? Now Anshu, now I will have to feed you sweets, right? Okay, let's see, it's done once, everyone has understood what normal means.

[01:07:09]Tell me once quickly, did you understand the meaning of normal? Tell me once quickly. Did you understand the meaning of normal?

[01:07:20]Write quickly once in the chat box.

[01:07:22]Speak quickly, quickly. This is clear even there is some doubt. Say it once.

[01:07:28]Yes, okay. Make it smaller.

[01:07:31]Why did it become so big?

[01:07:53]Sonu Choudhary I am back, where had you gone, you must not be sleeping, let's go, I understood, tell everyone once quickly, no, you are not ignoring, yes I understood, say it completely, I understood completely, tell everyone once quickly, quickly, you have not written in the chat box, are you guys writing, is it clear or not, write it once quickly, Gautam Raj, sorry sir, why sorry, why sorry, why are you writing, let me tell you, you had gone to have dinner, you are also having dinner, have you come, okay, clear, okay. very nice. Ok.

[01:09:07]Yes. Is n't it clear? Please zoom in. Please zoom in. Zoom out. zoom out. A little too small.

[01:09:33]Yes, now it's okay, Ratika, you tell me what is not clear, let me clear your dot, come, today you ask, right, tell me what is your dot, tell me what is your dot, sir, you don't take my name, oh, we take your name, right, do you remember your name, it's Akash, your name is army boy, Akash, okay, this name is now happy, are you happy, Akash, come on, sir, Kabir Express has not come, Kabir Express has gone, Krishna was there, Krishna Kabir Express has gone, sir, there is no Insta ID of this batch, there is no Insta ID of this batch, okay, I have subscribed to the channel, it's over, what is the need, it's time for an Insta ID, sir, yes, okay, someone whom I can follow, there is no need, there is no need, just subscribe, do you share it, the class is over, the class is over, Guruji, come on, one more thing, yes, after the last thing, you know what we tell everyone what to do, okay, first of all, thank you to everyone for watching today's class, and everyone, as soon as the class is over, when this class is over, then comment in the chat box and leave. Ok?

[01:11:08]Leave a comment. Yes. What are you saying sir? There is one more thing. Tell me, tell me. What is the matter? Speak up.

[01:11:14]Say.

[01:11:16]Come on, speak quickly. Say one dot personal.

[01:11:20]What is the matter?

[01:11:25]Speak quickly, quickly. Kritika, speak quickly.

[01:11:31]Good night, this is what I wanted to say Nitish Kumar Sir, please give me my Insta ID Sir, I will beat you up, tomorrow I will find out your Insta ID, wait Saurabh Yadav, good evening Sir, Saurabh is there, yes Saurabh is personal dot Sir, I ca n't say it here, okay, okay, no problem. Ok.

[01:12:02]Ok. No problem.

[01:12:04]Let's finish today's class. Come on, good night everyone. After the class, please write your feedback in the comment box: How was today's class?