रासायनिक अभिक्रियाएँ एवं समीकरण | Class 10 Science Chapter 1 | Lec-2 Board Exam 2027

[00:00:00]Come on all the children, go live quickly and join, you are welcome on Target Board 24, all the children, join as quickly as possible, come on, everyone is welcome. I am a little late today, child. No problem. There was some technical problem going on. All children join.

[00:00:40]Come on, all the kids, join in.

[00:01:23]Sakshi welcome Sakshi join slowly.

[00:01:47]All children join.

[00:01:50]Yesterday we completed Lecture One. Today we will do lecture two.

[00:01:59]You guys should watch the previous video. The last class that happened.

[00:02:03]Today we are going to do what is beyond this.

[00:02:06]All these things have happened. Exothermic endothermic reactants and products have already explained all this.

[00:02:13]Now we are going to learn from here. All the children who are joining live are welcome. I am a little late today. There were problems but still I am taking classes. Let us go children, we will keep solving the problems that are going on and persisting in Chemistry for you.

[00:02:34]Come on, all the children are most welcome. Sakshi is most welcome in today's live class. So when we write in chemistry, children, you must have thought that Sir writes zinc. Zn is zinc and a plus sign is given in the middle. And anyone can be anything here. Like here is sulfuric acid. H2SO4 is.

[00:03:04]Come sit with pen and paper. So let's say the reactant is This is what the children write on the left side, this is the left hand on the left side and a plus is given between them because both will join and after joining a product will be made, some product will be made, there will be some product.

[00:03:27]Come on Krishna, welcome child.

[00:03:31]Thank you very much. All the new children who are joining are most welcome. And what is happening here, kids, is that SO4 will combine with Zn. will become ZnSO4. Zinc sulfate plus hydrogen gas will be evolved. So the product is very good. Thank you very much.

[00:03:53]Babu, who are you? [nasal sound] Come on, someone, take a pen and paper and sit down.

[00:04:00]Write the reactants on the left side. Keep this in mind that the product is on the right side.

[00:04:03]So look down here, what is the number of reactants here, if the child asks then tell him that there are two. What are the reactants here? Zinc is and H2SO4 is.

[00:04:16]Thank you very much. And its product is ZnSO4 and hydrogen gas. So this has to be kept in mind.

[00:04:26]You should know better and easier.

[00:04:29]Anyone can ask you anything.

[00:04:32]So the product on the right side, the reactant on the left side. And this arrow mark is towards the product. Let 's see what happens next after the reaction.

[00:04:44]What will be built? Okay, my name is Sonali Priya.

[00:04:55]Okay Sonali, you are most welcome child, you supported me in this live stream. It was great to see you join the live stream. Now you are understanding things, child, so you write that Sir, it is okay. Keep moving forward.

[00:05:12]Now that we have understood reactants and products, let us understand the types of reactions.

[00:05:20]How many types of a reaction are there? This is your first chapter of 10th.

[00:05:27]Soumya Soumya you are most welcome child.

[00:05:29]Most welcome. It looks great baby.

[00:05:32]You guys are connecting like this. Come on, come on, great, some kids start talking. Don't talk.

[00:06:11]Here we are seeing everyone's comments.

[00:06:13]So here's the reactants and the products, kids, let's see a first one here. If two or more products seem small, then make it bigger. First of all let us see here, look here, now it must be looking bigger to you. Let's copy it, very good. Very good. Keep the copy open.

[00:06:36]Here one reactant and two or more products are formed. That means more than two products are being formed from one reactant. Let's see what is being made. Now look here, let's zoom in a little more. See, it is AI based. It has been made for you people so that you can understand it easily. I also liked it.

[00:06:55]Children's interest in reading also increased.

[00:06:58]Look, limestone is decomposing. You must have seen limestone. So the formula of limestone is CaCO3. If you have any doubt then it is written here that CaCO3 will ask about the interest on limestone in the exam, come on I love you. Come on, the whole country loves you, child. Everyone, your neighbor, your family, everyone loves you.

[00:07:29]Come on child, it will take us 2 minutes to solve the problem you are facing.

[00:07:35]We will kick you out of the live class. It's done, you will be happy. So let's go, there is no problem. Pay attention here and whatever ID comes here, child, we know everything about it, who it is and where it is from.

[00:07:50]Because when you create an account, you mention a lot of things in it. Okay, do n't give us that much time. So here the limestone which is CaCO3 limestone the kids will heat.

[00:08:05]What will happen if you heat limestone? Bud lime. This will ask in the exam, bud chuna and which gas will come out? CO2 will be released. This question has also been seen in the objective.

[00:08:18]Which gas will be released? So CO2 will be released. When you heat limestone, it will [sound of clearing throat] release CaO, which is called calcium oxide, and CO2.

[00:08:31]So here's looking at are warming up.

[00:08:34]Which gas will be released? CO2 will be released. So keep in mind that the reactant number here is one. Look at the left side, the reactant number is one. The product is two. A couple of CO2s too.

[00:08:52]Let's go to the next example here. I am enlarging it a bit so that you can understand it clearly. Now let's see here kids, two reactants and one product are formed.

[00:09:09]Now take hydrogen here and take oxygen.

[00:09:12]You might be thinking sir, two two is written here. What will you read that? So we will read atoms. How many atoms of oxygen are there kids? There are two atoms. And what are the two hydrogen atoms forming together? Making water. Now someone will ask you, tell me child, how much reactant is there?

[00:09:35]Welcome back.

[00:09:37]Well, Sagar Kumar is most welcome. So let's say hydrogen and oxygen are the two reactants, kids. What is making two go and in the product? Water is being created. Who is being created, children? Water is being created. So here the reactant number is two and the product number is one.

[00:10:00]Now let's look at an example here. When we balance two atoms of nitrogen and two atoms of hydrogen, we write it like this in the future. So ammonia is forming here.

[00:10:12]Who is building the child?

[00:10:14]Ammonia is being produced. All the children who have come Ashish Royal Hello Sir. Hello welcome children. Thank you so much for your love and support. We have come for you people so that whatever happens in 2027, our children should be able to give better results [sound of clearing throat] through online, studies will start on the app on 15th August Radhe-Radhe Sir Radhe-Radhe Children Gautam Gautam Azad, two reactants and two products, see children, look on the left side, see behind the arrow, these are two reactants, now you must be thinking that Sir, the biggest problem in Chemistry is how to read the formulas, so here Na Na means sodium sulphate SO4 means sulphate, so here barium barium chloride, so here there are two reactants. How much reactant is there, kids? There are two reactants.

[00:11:15]Let's have two reactants. Now here's the product: barium sulfate and sodium chloride.

[00:11:22]Now later we will ask which reaction is it? Not now. So here we have Na2SO4 and BaCl. Now see what happened here? Sodium liked chlorine.

[00:11:39]Chlorine suited sodium and barium suited sulphate. I liked the barium. So both of them got exchanged. So with barium came sulfate and with sodium came chloride. That means two reactants and two products. Okay, if you are understanding things, children, please comment.

[00:12:03]A child is asking about degree college.

[00:12:05]What is a degree college? What is a degree college? Don't know.

[00:12:10]I don't know. Look at example number two.

[00:12:12]Here's copper oxide, kids. Cu means copper O means oxygen. O2 will be two atoms of oxygen so it is oxygen.

[00:12:23]So copper oxide and hydrogen, see here the oxide will react with oxygen which is H2 and form water and copper will be left alone.

[00:12:33]And all these actions will happen due to heat. What will cause this? It will be due to heat. So you can visualize this a little bit through pictures. Can understand.

[00:12:46]What is number four, brother, if you see, we are making number four a little bigger, mn mn means child manganese, combination of manganese with oxygen is manganese oxide or you can say magnesium oxide mn manganese, let's go where can we get the notes? You will get the notes. Please join the Telegram group. When you open the channel, there is a link to YouTube below it. There are both Telegram and WhatsApp links. If you want to connect with WhatsApp then you can directly click on it. Please join. Then we will provide it to you there. Come on, we will get everything. You don't have to panic. So manganese dioxide and HCL now where is the HCL kids? You guys must know that you study. HCL is present in our stomach.

[00:13:50]Where does it happen? In the stomach.

[00:13:52]hydrogen chloride. So magnesium chloride plus water chlorine. So look here are three Go products. What is Go? There are two reactants and three products. So this was just to explain it to you. Now when we share this PDF with you, you can easily understand it once you sit at home. It is AI based, so it will be very easy for you to understand things. It will seem very easy. It won't feel heavy anywhere.

[00:14:24]If there is any small error, we will correct it. It's no big deal.

[00:14:30]Now let us see what is a balanced chemical equation? Write it down on a copy. Balanced chemical equation. So there is a balanced one and an unbalanced one which is called skeleton. Here is the balanced chemical equation. So if the number of atoms on both sides is equal then it will be called balanced. Now let me write one and show it to you. Let go.

[00:15:00]So CaCO3 CaO + CO2 Let us try to understand here now.

[00:15:12]So look under calcium kids if there is nothing then there is one. I will write here that both the brothers live together. Keep this in mind.

[00:15:22]See here what is Go element? There is calcium, carbon, oxygen. So carbon is also a go nothing.

[00:15:27]So there is oxygen, there are three. Okay [nasal sound] it's done sir. How to get the PDF? I told you children.

[00:15:42]Now come here. Calcium is a co. The oxygen atom is aco. Let's write it down. Let me write this also.

[00:15:58]Carbon is a go. Oxygen is two.

[00:16:02]Keep this in mind.

[00:16:05]Now we will try to understand balanced and unbalanced.

[00:16:11]See calcium is echo. Look here is calcium echo. You have to look at both the left side and the right side. Carbon is echo. Carbon is echo. Oxygen is three-dimensional. There are two Go here. There is a three go. So we will write this as balance.

[00:16:30]Balanced is balanced.

[00:16:36]Let's write it down. If it is balanced then this equation looks very balanced Veer Shrivas, thank you very much, I am very grateful to you for your live class but very few children are liking it. It is important to like the class.

[00:16:57]Things made sense. What is balanced? Equalizing the atomic number is called balancing. balanced. So which side has to balance the atomic number? On both sides, left side and right side. Now you can say in your language that the reactants and products will be equal on both sides. It will become balanced. Are you making sense of things?

[00:17:20]Take pen and paper and take notes if you get time.

[00:17:26]Let's move ahead.

[00:17:29]Write down the trick to balance it in your copy.

[00:17:34]Many children have not written, they do not know.

[00:17:37]How will you balance it? How will you balance both the sides, left side and right side?

[00:17:44]We will understand the heat and trial method. There is an algebraic method. Tell me again sir.

[00:17:51]Gautam is again telling about the children. Count the first element.

[00:17:55]What is an element? The children must have studied.

[00:17:58]Hydrogen, helium, carbon, ferrous, magnesium, lithium, boron, children must have heard the name of the periodic table in class nine, it has 118 elements. There is a joint from that, you will see almost here. Hydrogen oxygen will be more visible. Balance the big ones. The hydrogen and oxygen have to be balanced later.

[00:18:29]Count hydrogen and oxygen as elements first. Let's write this down, it will be useful. Come on.

[00:18:44]Here it is said that writing the substances participating in a chemical reaction in brief with the help of symbols and formulas is called chemical equation. This little page has come up. So what is the chemistry definition?

[00:19:07]A child is asking, is it CGBS or CBS, Veer Shrivas?

[00:19:19]Hello, my Lalu Lal Lallu Lal, how are you? I do n't know if you recognize me, I don't know if you recognize me, let's go Reet Pandey, whoever you are, thank you very much. At least join live and ask about my well-being. Well, there is CBSE, it will be useful for CBSE students also. The only condition is that here it is Hindi, Hindi medium and yours is English medium.

[00:19:55]A child is asking what is chemistry definition? What happens to chemistry?

[00:20:02]What is the definition? So what is the definition?

[00:20:11]What is the definition of chemical reaction?

[00:20:15]Veer Shrivas is Chhattisgarh Board. If it is Chhattisgarh Board, children, then your board is Hindi medium or you write in your regional language which is the official language of Chhattisgarh, state language or Hindi is used there, then doing this work in Hindi can help you.

[00:20:35]We will understand these chemical equations in English and Hindi. What is called a chemical equation? So the method of writing the substances participating in a chemical reaction in brief with the help of symbols and formulas is called chemical equation. Now like zinc came. Now look at the two ways of writing equations.

[00:20:55]One is through words. You know ZN means zinc. Zn is also known.

[00:21:05]Sir, please take my name. Reet Pandey ji is most welcome. Adored. Okay, I have taken your name, children.

[00:21:13]Reet Pandey ji, I have taken your name two-four more times.

[00:21:17]Reet Pandey, it was very nice of you to come from Chhattisgarh. Children, you are most welcome. In this live stream, you are studying chemical reactions and equations. We will explain them very deeply. Veer Veere Veer Shrivas, very deeply, children, where will it reach?

[00:21:42]I will explain things in a very systematic manner so that there is no problem.

[00:21:45]One is word equation and it is the biggest obstacle for children to understand this chapter.

[00:21:51]One is a word equation. The meaning of the word is like if we say Zinc, then the child knows Zinc in Hindi as well as in English.

[00:22:00]So you should write zinc as zinc.

[00:22:02]If you cannot see it in Hindi then please enlarge it. We feel it is clearly visible. The meaning of zinc is understood children, Zn also means zinc and in Hindi also it is zinc. After that, if you are writing sulphuric acid, then sulphuric acid is H2SO4 sulphuric acid and after that when it reacts, it will go with ZnSO4. Who does Zn like? SO4 will then become zinc sulphate and hydrogen which is a gas. The sign above means where does baby gas go? It goes up into the atmosphere.

[00:22:50]Now someone's out of internet, kids.

[00:22:53]Where am I, where are you? How will it be his? So if the internet is gone then check it later when it comes back.

[00:23:03]Happy Birthday. Come on, happy birthday to whoever has their birthday today.

[00:23:10]Let us understand the method. If zinc reacts with dilute sulphuric acid, zinc sulphate will be formed and which gas will be evolved? Hydrogen gas will be released. Which gas will come out, child? Hydrogen gas will be released.

[00:23:32]So now let us see the speciality of chemical equation here, you will see it, it is for you only.

[00:23:43]Let's take another example to explain it to you. It was made with zinc and sulfuric acid. Another example is that brother, take bud lime.

[00:23:58]Add CaO calcium oxide and water. What should I put? Add water.

[00:24:09]Why will powdered lime release hydrogen gas?

[00:24:14]Hydrogen gas will be released because zinc is a metal and metal does not fly in the air. You have heard that the iron will fly in the air.

[00:24:28]Iron is a metal. When you read the periodic table, you will understand which are metals and non-metals and which are gases.

[00:24:37]If the same hydrogen reacts with oxygen, it will form water, liquid.

[00:24:46]What happened here? Zinc liked the sulfate. I liked SO4. Who did SO4 go to? Went to Zinc. Who was left alone? Who is left? You see for yourself. Hydrogen was left alone. So what is the single hydrogen? There is gas. Now where is this gas going? It's going up. will go into the atmosphere.

[00:25:09]So this is the reaction.

[00:25:13]Let's look here now. You tell me sir, can iron fly? How will the iron fly? Now you tell me. At what temperature will it melt? At 33500 degrees Celsius. So it will become like water but will not fly away by turning into steam.

[00:25:29]Now let's come to calcium oxide bud chuna.

[00:25:33]Pick the bud.

[00:25:42]Take the bud lime. Add water to the lime.

[00:25:45]So it will become calcium hydroxide.

[00:25:48]This will be asked in the exam. Calcium hydroxide CaOH2 will release a small amount of heat which is called heat. Now let us understand this better.

[00:26:05]Ok? This is also called an exothermic reaction because heat is being released. Let's move ahead. The reactant-product discussion has been completed.

[00:26:22]Writing chemical equations has also been discussed.

[00:26:28]What should I write left or right? Now, from here, whatever you wish, go ahead. There is one Reet Pandey.

[00:26:39]He is saying that Sir, I am not able to understand anything. That's right, child. If suddenly there are some children somewhere, for example, a live show has just been shown on their screen and they have joined, then it is possible that they may be delayed by two, four, 10, 15 minutes and that may also be the reason why they are not able to understand things.

[00:27:09]First tell me which chapter are you reading? All the children, please comment and tell us which chapter are you reading?

[00:27:20]A child's question is what is chemistry? chemistry? What is chemistry?

[00:27:26]Sir, what is the definition of chemistry?

[00:27:29]What is chemistry?

[00:27:32]What is a science? Science has to be understood first.

[00:27:35]What is science? The way of learning things sequentially is that children study science in two ways. We study one theory and one practical, the knowledge that comes in a systematic manner is called science.

[00:27:57]Hydrogen sir is being separated very precisely. Yes, that's right. There is gas sir, I will give the sign above. So it makes sense here.

[00:28:06]One thing left is metal. What is metal and non- metal? Let us understand metal and non-metal, what are non-metal and metal?

[00:28:16]So let us explain the science first.

[00:28:18]what is science? The knowledge which is the method of learning things systematically is called science.

[00:28:24]You must have seen a movie Mission Mangal.

[00:28:28]What did Akshay Kumar say in that? This is how he has played the role of Bhabha.

[00:28:38]So he said there is no science without experiment.

[00:28:44]If we do n't experiment, science is incomplete.

[00:28:51]So you have to understand and also explain.

[00:28:54]That is what is called science. Now comes chemical science. One is physical science, the other is chemical science. Yesterday we were explaining both physics and chemistry, brother, what are both?

[00:29:13]So there's a lot of chemical changing that happens, what happens? A chemical phenomenon that results in the creation of something new. It is a chemical phenomenon. Any physical event that occurs for a short period of time is called a physical change.

[00:29:29]Water turning into steam, steam turning into water.

[00:29:33]But digestion of food after eating is a chemical change.

[00:29:39]So what is here now will take less time Sir what is force and force and pull? What is force and pull? Reet Pandey is asking, force and pull, children, force means push and pull. Force equals push and pull.

[00:30:05]When we push or pull something. You might have seen one or two doors being pulled back or pushed forward. This is called push and pull. And this is how force is generated.

[00:30:24]Force f = m * a mass * acceleration. Let's go, it's Nine. He is not from 10th.

[00:30:32]Children discuss whatever is there in 10th class. No matter your question. These are good things.

[00:30:37]Children should be the ones asking questions. The question must be asked. But it feels better if you ask questions related to what the child is doing. Let go.

[00:30:49]So a change that does not result in the formation of a new substance.

[00:30:52]Look, here it has been asked that if a new substance is not formed then what change will it be called? If no new substance is formed then what will the change be called? So what did we say in chemical terms? A new substance will be formed. physical change. Which change? physical change. Magnesium and oxygen combined. So this is called combination. Which reaction will it be called?

[00:31:17]Combination.

[00:31:24]Life process reproduction chapter will be done immediately by children. The reproduction life process will be completed immediately. I am bringing a class next week. Let us first make the children learn Chemistry today because here you will do a little bit of this on your own and then we will share it with you. So you have to do all this yourself. MCQs have been given to 50. We wanted to get it done like this but we are not able to do it.

[00:31:49]Time is short. Let me explain to you the balanced chemical equation. I have explained it. Let's have a chemical equation here.

[00:32:03]Veere, you stay connected child. We will get everything done if you feel like it, then keep one thing of mine in mind, if you find the qualities then make him your Guru, if you find the heart then make him your disciple, if you find the mind then make him your friend, otherwise stay alone, if you feel that he can be your Guru, if he is worthy of becoming your Guru then accept him as your Guru and then follow the path shown by him, then make him your Guru, if you find the qualities then make him your Guru, if you find him your disciple, if everything is matching or not, my disciple is mine, my disciple is intelligent, then you can make him your disciple, you can make him your assistant, if you find the mind then make him your friend, if your mind is matching with your friend then consider him as your friend, if nothing is matching then stay alone.

[00:33:08]Okay Veer is saying that try to explain in English medium. Why not why not?

[00:33:24]But I liked the child's ritual very much, your child is very good.

[00:33:32]Let us now come to the topic that we have read a little about here. If you wander too much then the children will get ruined. I have to try to explain it in English medium. Why not I will try. Okay, now you might be thinking that we are saying I will try. I shall try not to speak.

[00:33:55]So when you come to teach English, then you should also see that I have three subjects, there are three-four subjects which we will teach you till 10th.

[00:34:02]We also teach all the 12th class students who are Arts students. History Piti, thank you very much for giving us so much love. If you have commented so much then this is enough, child Reet, I liked it very much, you write very well Reet, you just have to keep these positive things within yourself and move ahead, one day you will do something big and until you do something big in life, you are a zero in the eyes of the world.

[00:34:38]If you want to become a hero, you will have to do something different.

[00:34:44]For now, look at this Reet, write it on the copy, Reet Sir, you take my name Reet Pandey Reet, we take the name of the children Rite and whatever you have written next, we do not think it is a good meaning to take it, many children study on this platform, everyone is respected, everyone should move ahead, small or big, let's see how many atoms of zinc are there, the atomic number of zinc is written below it, so zinc is one, child's one, it is one, let's surround it here because it is alone, hydrogen is one, sulphur is one, oxygen is one, all these are together, that is why we will write them together, we will give brackets, you have taken it 70 times. Don't get angry.

[00:35:51]Zinc is echoed here too. Sulfur is ako.

[00:35:54]Oxygen four go. If hydrogen is different then it will be written separately.

[00:36:00]But the left and right side count will remain the same.

[00:36:06]Come on Veer Shrivas, pay attention, zinc is one, zinc is one, hydrogen is two, hydrogen is two, come on brother, sulphur is one, sulphur is one, oxygen is four, oxygen is four, now what should we name it, what should we name it, come on Veer Shrivas, blood double printing, we are not able to understand, Rit, what question are you asking, please type it again and tell me, and this is balanced, what will you call it balanced, children will call it balanced because the number of atoms on the left and right side is equal on the left and right side. This would be called balanced. Piyush welcome kid.

[00:37:12]I am a little late today by 15-20 minutes.

[00:37:15]Let's try to write it here.

[00:37:18]Ferrous Hydrogen Fe3O4 + H2 Now here we have to see what is the atom of iron?

[00:37:40]Reet Pandey If your question is correct, child, then we will try. If we have that information, then we will share it with you. We will tell you that you type the question correctly. We will write fe fe here. Children, we will put brackets below it. Let's see how much hydrogen and oxygen are there in ether, children? There are three. Oxygen is four. Is together. Give hydrogen. Now let's look at the biggest thing. The biggest thing Ferras see here is a go. There are three Go here.

[00:38:26]You say, Sir, multiply it by three. It will be three. I made it balanced. It was unbalanced, we made it balanced, so it is unbalanced, so here it is written first, we are teaching to balance the unbalanced, ferrous is three, ferrous is three, oxygen is one, here oxygen is four, so multiply it by four, but both will be multiplied because both are together 4 * 2 = 8 4 * 1 = 4 now see here it has become eight, so here also you will have to multiply by four. It will be eight.

[00:39:11]Now look at the left and right sides and tell whether it is balanced or not. Balanced or not atomic ferrous is three go.

[00:39:23]How much did you multiply it by next to balance it out? Did it with three.

[00:39:28]See how much hydrogen is multiplied by?

[00:39:33]From four.

[00:39:36]Ferrous See Fe3O4 Hydrogen See How much is it multiplied by? It became balanced with four.

[00:39:47]Hey, if you do it once or twice more, you will understand. There is no question of saying no. If the mind loses, it loses; if the mind wins, it wins.

[00:40:00]Let's balance this out. Look ahead.

[00:40:17]This balance has been achieved.

[00:40:20]Let's look further.

[00:40:25]BaCl2 Al2so43 BSO4 + ALCl3 Try writing it on your copy. Is it balanced or unbalanced? I just want to tell you this much.

[00:40:49]Sir ji, it goes online at 7:00 but today it went online at 7:15. I apologize for being a little late today. Today we ourselves were in a difficult situation.

[00:41:03]Barium is barium is a chlorine is two together. If it is with us then we will put a bracket. Yes, I will inform you guys about tomorrow.

[00:41:17]Tomorrow is Friday and the day after tomorrow is Saturday. The subject which is going to be taught on Friday, that is, what we will teach you, your English class is going to be held on Friday.

[00:41:34]Will teach article chapters. Which one? I will read the article.

[00:41:44]Children, Veer Shrivas, if you can explain this in English then please tell us. I have a question for you. If you are from English medium then it is a little easy for you.

[00:42:08]Children who are from Hindi medium do not understand Chemistry easily. Let's see 3 * 1 = 3 4 * 3 = 12 barium see there is one. Sulfur is one. Oxygen is four aluminum one. Chlorine is three go.

[00:42:40]So here you can see whether there is balance or unbalance, you have to be told.

[00:42:46]What are chemical changes?

[00:42:49]What are chemical changes?

[00:42:52]Rit you are asking. Come on Reet, you have brought up a very good question. Chemical change.

[00:43:01]We had told you children in the last class.

[00:43:04]What is a chemical change?

[00:43:08]Change of state, change of color, color change, temperature change, state change.

[00:43:21]So if all these things are changing then understand that it is a chemical change.

[00:43:29]So when I came here I saw that it was written unbalanced. Now what follows next will be the class of this chapter. We have to understand the importance of a balanced equation.

[00:43:38]This will come in your exam and how to calculate it. So that's what we'll be doing for today. You tell.

[00:43:52]CBSE CENT Questions is your first day. It's okay, kid. I have had a lot of classes in the past and tomorrow there is an English class. Join us and we will teach you articles in English.

[00:44:11]Use of article. There is a class ahead of this, right Sagar?

[00:44:17]Sir will come next. We will get Physics MCQs done. I missed Chapter One of Physics yesterday.

[00:44:26]Let's have a lot of children. It feels great to be among you guys. Please write this down. That's it for today. We will proceed further with this. There is English class tomorrow.

[00:44:36]Children will teach the article. We will teach from scratch and will leave after teaching.

[00:44:46]What is a physical change? That in which there will be no change at all is a physical change.

[00:44:54]Just as water became steam, steam became water. This much can happen.

[00:45:00]Children, if you have studied, what kind of change is burning of a candle? Are there changes?

[00:45:11]What changes does burning a candle bring? You will tell everyone. Please play Sir ji's song.

[00:45:24]We don't feel it. We don't seem to. The holiday is over, I am leaving, Physics will start, your Physics class will start at 8:15, children, my question was, tell me which changes are there in the burning of the candle, chemical change or physical change, physical change is wrong answer, two changes are visible in the candle.

[00:46:05]If the wax is melting, it is a physical change. The light that is burning is a chemical change. The light will burn out and it will be over. The wax will not burn. The wax will be recovered.

[00:46:30]Ishaan, you are very welcome.

[00:46:34]A CBSE student is giving it. Both of you, hello sir. You have written so much in such a big way, Hello Sir. Your heart is a river, the rest is an ocean.

[00:46:48]S K Yadav, I liked it very much children, please give me lots of likes after watching it.

[00:46:54]Seeing all your love, let's go, Physics class is about to start at 8:15. It's 7 minutes. Please join again. That's all for today, we will move ahead in chemistry. I will tell you how to balance it. What are those things? How will you balance it?

[00:47:14]I will also explain the hit and trial method. Please tell me how you liked the class. Sir, CBSE candidate Ishant Tiwari Sir, if you are from CBSE then you should speak in English also, why not, if someone from CBSE is coming to our batch and joining the live session then we will speak in English also, the children will speak in English also, we will speak some words in English, we will speak five times, don't say it five times, we will do it one by one. Let's see. Well, it feels great.

[00:47:52]You are a hardworking student. This type of thing is not easy. There are a lot of lazy students. So what will you write? I am quietly watching those who are teaching. There is a child who types and asks the sir. Tell me about this sir.

[00:48:08]Tell me about this sir. Feels good.

[00:48:13]New Student Rahul Yadav. Rahul Rahul, you are most welcome children. Most welcome most, thank you very much, I liked it very much children, Movie Hub Star, thanks sir, absolutely thank you for showing so much love, now I take leave, join every day at 7:00, children, join at 7:00, then join once more at 8:00 and at 9:00, children who have taken class 12 Arts, tell them to join at 9:00. It is not like that children, this is my duty and no one becomes a teacher like this children.

[00:49:01]And the thinking and intention of many teachers on the online platform is strong. Only then do we come to this platform. Otherwise, many teachers remain happy even offline. But if he wants to connect with lakhs of children, it will be from 7:00 pm. If one wants to connect with millions of children, then they come to such platforms.

[00:49:24]Connect through online.

[00:49:27]Connect via live. The app is launching on 15th August. Classes will also start on the app after 15th August because our beginning, children, started from 15th August on this YouTube and we have to go further, children. I need your support and please get some subscriptions. Ask your friends to join as well. Bye. Thank you very much to all of you.