12th board chemistry questions paper solutions 2024 #chemistryexam @a2zpractical991

If he has come, we will see him and understand him, okay? You must watch this video in full And this is the 12th Chemistry solution here, which is your board exam paper. So, basically, I feel this question is wrong—it's worth just one mark. Alright, so I'll tell you at the end, but first, Paul, we're leaving. The 10-mark MCQ you get from First Paul Solution is right here So let's see You are basically saying that the 12th chemistry I am providing for you is not practical. The board has brought a question for you, and this question is yours. People have written answers, but is the answer you provided correct? If written in the answer paper, today I will give you the complete solution to this. I'm giving you Bilbul A to Z and Cut to Cut, okay? So let's go, I'm I'll solve this question for you step by step, so first of all, you need to know If you get 10 marks from MCQs, how many MCQs did you get right, come on Whenever I show you the section, this is your section, Number One, Part A, okay? Here, what is the correct answer to select? Appreciate this again, multiple Multiple-choice questions for which you receive one mark for each correct answer So first of all, let's see how we solve this; what was the first question asked to you? Let me tell you the answer to this. If you have the answer to this So, coming back, the one with Fast C, that's correct, its answer Basically, C is there, okay. We'll just check how C arrives. What exactly are we supposed to find out? The spin magnetic moment? Chromium plus three means we need to remove three electrons from it. I'll do 2 from here, so what will remain with us? 3D will remain. Alright, so what's left here is 3D 3. Now, for 3D 3, what will you need to do? Five orbitals, or rather, the d orbitals, need to be drawn. One, two, three, four, five And we need to fill three electron tubes. How many electrons are there in D? Three So I huff, one, two, three So, what will this B part here become? It will be fixed; after that, we move forward. Some is then pH sub zero point zero Forest Mallor Scale Solution is You must know its formula. PHC, PHC calcite You know the formula, what is the formula? What is pH, what happens in pH, pH Gjikers to minus log to best H, H plus ion So how much has it become? If the Matlapp Strait is closed, there is a break in the East Plus and Strait Minus. So how much is it? What you need to do is place this value right here. The fifth, the fourth Koushyan is When she arrives here, she will surely be upset. And this bond will be delivered here. So what will happen here? CS3C Double bond O What will happen on the Jega server for CS2? So, whose structure is this? If I am here, I will definitely tell you what's inside this video, please stay tuned and stay with me So, so friends, regarding your Question Number Two, the first one basically is that you've been asked: "Write the name of the person." So, in Chapter Number 13, I will tell you about the application of silver nanoparticles, like Ag NPs, to remove bacteria from water. That's all you need to write. You will get one mark for this. So you just need to write this: AG NP, okay. The second one is the right name, the reduction product form when ethyl cyanide is treated with sodium and alcohol. This was a slightly confusing question. Treating ethyl cyanide with sodium and alcohol gives this. It provides hydrogen, and what will hydrogen do? It will break the triple bond within carbon and convert it into a double bond. Traveling at the edge of the product Main is my sign. I did it. Zero is high. Just wait a minute here, please change this bus a bit Are you saying that you're tired of being called Fae? Radio, are you ready? So, it becomes ISO signet, NC becomes. Alright, take a look at this After that, the next koshin was given. the effective atomic number effective atomic number, one of the most important questions was also there How do you calculate z minus x plus y What is z, the atomic number of this? cobalt x is what, you'll have to find out the oxidation state Thus, its oxidation state comes out to be 3. So here it is, 36 Aree What is 36 now? 36 comes in your noble gas electronic configuration As if All of these, 2, 10, 18, 36, they are all Your noble electronic configuration is So, what will EM be here? Will apply, will be applied Then I'll knead the dough, here's question number 5 What was asked of you in question number 5? So, this is general science. if you receive D0 or D10 So it's completely filtered, electrons aren't even present anymore. So what do you get, you're colorless So, let's find out Look, Titanium Plus 4, Titanium's 3D to 4H2 Plus 4 said, take out four electrons from here So, what do D0 or D10 show? colorless compound shows Alright After that, you were asked that This is asking for the SI unit. molar conductivity The SI unit of molar conductivity is siemens per meter squared per mole (S m² mol⁻¹). You would know from S n squared, inverse mole Alright Then he asked. that when The sign convention for work done is as follows: - Work done **by** the system on the surroundings is considered **positive**. - Work done **on** the system by the surroundings is considered **negative**. during the expansion of gas So when the gas will expand But Laz Wan Ider The condition of reverse osmosis So, what is reverse osmosis? direction of osmosis can be reversed by applying pressure What will we do with osmosis? We will reverse it by applying pressure. So, what should we call this? reverse osmosis What will we say? reverse osmosis After that, you have section number B. Then, you will be given the first one. maximum work obtained during the isothermal process I mean, this is not cut to cut. A solution has been provided for your test book. Alright, and I'll just directly write the page number here. Why, which page number will you go and check it? Your page number 69 It says on page number. 69 Page number We can solve its derivation by going up to 69. That is your reversible expansion The expansion of maximum work The expression for maximum work is the same as your answer. Alright, now we move forward. Next is your question. What is an interhalogen compound? And having your chlorine react You know what halogens are? They are electronegative; that is what needs to be written in it. And many if halogens interact with each other If they become combined, that is what we call it. What is the definition of an interhalogen compound? The halogens have different electronegativities. due to different name in their electronegativity two or more halogen atoms combine to form a species which may be ionic or neutral when two or more What do we call that compound? Interhalogen compounds And you were asked a very strong reaction twice. For Marx, if you have CL2 select line with calcium hydroxide What will you become if you react? So you can see how bleaching powder is made CaCOCl2 plus CaL2, delivery Plus H2, this is formed Now comes question number 5 In question number 5, what is being asked of you is: What is a nanomaterial? and write the reaction involved during a sol-gel process Hydrolysis will now have done what many children have done sol-gel What will remain for the entire process? No, there would not have been two reactions below it. That's exactly what you were supposed to do, the contract first nanomaterial What is a nanomaterial? It has at least one dimension. for which is at the nanoscale Such a word of yours has now entered the dictionary. Anyone who has something 100 nm in size now You will believe in me. If so many words are coming, then it's perfectly fine. For the bacteria And the metal as well as the alkyl will also form this with hydroxide. These are the two reactions you were supposed to write. One was hydrolysis, and the other you were supposed to write. Condensation You can see it very clearly right here. Look here! And I'll take the next AB over here. Next one will come over here to you Dikhang Wald is a protein, so take it accordingly. The Turpidicram classification brought you from protein to me. Those two were supposed to write and come to you. If you're giving me a miss, that's fine. But it was also a type of ap protein Classification of proteins So, please check it yourself from your test book. Koushin Number 7 Koushin Number 7, take a look So, you can see the solution here First, you will need to extract the strike matrix Copper can withstand up to 300 volts. Plus two means two will be accepted. What will you make, Kopar? Calculate its mall penetration. The forest mall had taken copper. Two electrons are approaching it. So one by two will become W's formal look or I into two Devit by 96500 Mall Ratio Into Molar mass has been given to you Break it open well, you kids. You have been given the W value. How much Wallyo has been given to you? Look, the weight of the deposit is 2.4 grams. Just do it here How much will you charge for 2.4 grams? 2.4 grams of I I gave you the current. Please calculate this thoroughly and accurately. You will be given time in minutes What can you do in just a second? You can get the vaccine; just go ahead and get it done. Calculation. Now we move forward. What did Cosine Number ask you? Y that the PKB value given was How much did he ask for 3? Look, as many as P.K. The value of PKB It will be that much less basic. will remain as if you are here But you'll see that Tell me exactly What will remain for us? Vaccine PK The value of the lis peak is as much as it is. What will remain will remain that much Stronger base will have a higher pK value What else can you do from your perspective? I can take things out, just like the previous one, the peak of the wild one It will be approximately 3.27 when we check. And when we check the PKB value of the second one, it is 3. So 3 means lower GDP value The lower the PKB value, the more basic it will be. Alright, let's move forward. Explain the buffering action of sodium acetate, acetic acid, and the buffer. What about this one too? It's also cut to cut, your page number The page number is given to you, and the cut-to-cut answer is provided. Page number 60 On page 60, you are given the common ion effect. When you go inside, you'll see it to consider the solution, weak acid, acetic acid, and the ionic salt sodium acetate, it's urgent, take care of it You were supposed to write, there were full marks for it here. Three marks here, two marks, meaning a little bit needs to be written in the Sais section. Next, write the preparation. What preparations have been given to you, show them So you need to prepare. Preparation of diethyl ether and ethyl cyanide from ethyl bromide: First, you need to prepare diethyl ether. And what to make in the second one, ethyl cyanide What would you do to prepare diethyl ether? Sodium ethoxide is a reagent, and you will need to use this one. So what will happen, N-A-B-R will come out. What do you want to make in the second place, are you trying to make cyanide? So what will you have to take, alcoholic K-C-N What will you get if you take A-G-C-N? Isocyanide So, the C-N will go here. And what will happen to K-B-R here, will be removed Next, again a numerical-based question Asked about Henry Constant You must know Henry's Constant, what is its formula? Bisexual, its formula is K minus H times P So you have been given the value of K-H, 0.159. And values for pressure are also given; solubility is asked. The next constant is, monomers were asked Now that many products for children have been made, it will be wrong. They just need to make monomers. So, what was given to you first in monomers, nylon 6 So, this shows that nylon 6 uses E-caprolactam. What will you do, isoprene What will you do with isoprene? What do you make from isoprene? Natural rubber What to write in the lengthening contraction? if we are moving from left to right What will happen as the atomic number increases? But atomic and ionic size goes on decreasing. That is what is called lengthening contraction. And in lengthening contraction What else needed to be done for two marks? K₂Cr₂O₇ does not have a "balanced chemical equation" by itself, as it is a chemical compound, not a reaction. However, if you are asking for the balanced chemical equation for the decomposition of potassium dichromate (K₂Cr₂O₇), it is: with Acidify H2S So, look, this K2Cr2O7 It was supposed to react with H2SO4 and H2S. So something like this, you know, product See you, a bit of an odd reaction. But it's easy, okay Next is question number 14 Question No. 14 What is it, derive the relation between He never used to come, but this time he has come. derive the relation between molar mass, density, substance and unit cell Page number 8, found the relationship molar mass, density, substance unit cell and This did not come every time. It's here this time, basically Nothing appeared above the formula, nothing above the formula Numericals were there, now the formula You've come here to design, so just take a look at it Page number 8 was given, basically Section Number Here they come, Section Number You come to section number C You have to eat, and one, three, three marks are left, so the first one What is the osmotic pressure? Go to chapter 2 of Namr, and stay there, question. written or not written, and the second Therefore, with inbuilt, how will you determine the molar mass of the solute from the osmotic pressure, then in osmotic pressure Not just that, you had to write exactly this, Pi is equal to N2RTV, and later this is It was supposed to manipulate in two or three lines, and Had to get very easy marks In this, you'll get very easy marks It's found, okay, come on, Now question number 16, as usual Given: Resonant reaction, whose You see, it's part of the organic. Gattermann post-selection, Igdam good It is written in the test book: Gatterman post-selection Down below, there, and the Kanizaro reaction, Also given in the test book, as usual, go there Look, that's all there is about question number 16, now let's move on to question number 17 Above, question number 17, again What was given to you in it, that If you combust CH4 So what will happen, so CO2 and H2O will become this will be liberated, meaning it will come out, and you will What was asked, calculate the standard enthalpy of the standard enthalpy of combustion of methane So what did you have to do, just this formula What is standard enthalpy? CO2, H2O Minus, what is your reactant? CH4 and O2, this It will go into minus, this CH4 and O2, Now everyone's value was given to you, for CO2 It was given, H2O was given, CH4 was given, but they did not provide O2, because What are diatomic molecules? What is the value of a constant? 0, their value you should write as 0, all of this You calculate carefully, and here's what you'll get. The result will be obtained, okay, Come on, next, Question number 18, broken one What did you give, what did you give? What is the action of following? ethyl bromide with silver nitrate Mg in dry ether and alcohol in sodium hydroxide, Looking at the solution, the first one is given AgNO₂, AgNO₂ silver nitrate, then AgNO₂ will come here, And AgBr will precipitate out. The second one was also given with Mg; place Mg in the middle. And even up to Laz, it had been given, Alcoholic AnoH had been given, The happiest one was he, the very one. Alcoholic AnoH Had not given the actual year. There is a world of difference between an alcoholic and an actor. What will he make who is an alcoholic? Will form a double bond, what will it form, double bond, Like, this will go along with that ani BR. And he takes off with any one of these. Both of them suffer, and both of them suffer. So, does it look like a double bond, okay? Just look here, I think a lot of people are going to get this terribly wrong. Question No. 19, For the reaction A plus B, And you are required to calculate the rate law in this. What would have been given, if it had been necessary to find out? If B is doubled at constant A, The rate of reaction is doubled, look, What did you say? If it's B, then you double it. So, what will your reaction rate be? Double, then it will remain as it is, okay, Write it as it is, then That one will go to Dumgon. You must know this much in the context of the drama, right, okay, If I take this out, there will also be a Y on top of it. And above it, it will become Y, then, Another one of these build choices was this. If the S. Panī Bāi had been a bat, and if B had been a right, then my Panī would have had a prekṣa of six Sikhs. And that was her only way, and she would be a right one. So, if you take this outside the brackets, x will become 3. And what will happen to y on 2? What do you need to do with this now—solve it, divide it, or what? Divide the first 2 by 1, then divide the 3 by 1 as well. So, divide 2 by 1, then how much did I get for the value of x? I got 1. Please check the list of what is being canceled, okay? Everything is already written right here; you can even check it by pausing. But you should watch the video all the way through because in this paper, I think a whole question has come out wrong. Alright, if I'm not mistaken, the mark will go to you, okay, let's go It's indicating that the more the number of oxygen atoms, the more acidic it will become, right? Like, first, let me show you. SCLO-4 has more oxygen, so it will become more acidic; then three, then two, then one, so what is its acidity order? Next, you're told about the ionic character; you should know that it contains more ionic character, then less, then less, and finally, the least. If thermal stability is considered, HF is more thermally stable than this thermal stability, so HCl has very high thermal stability, thus... Bath Paniya 21st Century Pishmer Dhyatkan Dhyakhan Then, along with your test book, it's like the Peshmerga Dialect, Dialect You people are reading in turns, right? Our ADT, is this ethylenediaminetetraacetic? Alright, check this out, ADT, let's go ahead then Kushyons Namr Twenty Tha Sim, you are a question from your test book. Just look at it and write it down. Kushyons Namr Twenty Four gives you Kushyons with bracketed organic ABC will come. So when you combine it with rat posporus Look, I didn't write this; when you look at it It will be read aloud. This is yours Will become Oh, this is it then This one Breaks down Also this It will be read aloud. Because this is your address, Lithium aluminum hydride. Hydrogen provides a lot of hydrogen in the reaction. Okay? Let's go page no. 25 Define acid and base According to Laurie Bronstein, it's fine. And on the Diwali night, one should just look at the stars, not drink. It was a great joy. Please go and check it. Page not found, please check the URL Acid and base, and the second pee, not drinking it either, also your own These people have repeatedly caused disturbances in your college and even in your class. Because Kafi is a type of musical composition. Koushtin Soul of Pia and Pioa After that, Kaushtha Number Twenty-One What is in Q26? Potassium Dichromate To prepare You need to prepare Potassium Dichromate. K₂Cr₂O₇ Chromate ore Prepare from chromate This is also given as it is in your test book. Page number 176 This is negatively charged. So where will the carbonyl carbon be attacked? It will create something like this here After that, this electron will shift here. You must know about chize Then what will become negative there? Later, how will the Mjölnir beer come out? As you will react with hydronium ions So, the H that comes out from here will go with O. And what will you make here, oh A? Just match it if you have such a product They must have made the exam, so why is it green? Gardener The patches on the agent are fixed, okay So this is your iso profile alcohol If you have done it, then it's fine. Cumin to phenol, look here, this is also your phenol chapter. So this is your cumene structure. It's okay to be a little nervous. 23 Calvim Temperatur React to O2, what does O2 do? This entire reaction It shifts over here, this H right here If this has become your finoul And Bicycle, what is acetone? And the last one is Ani Sol to Finol, look at this This is the structure of Ani Sol. If you're together with me, then what has become here our final? Let's also take a look at this. Write to you this opt neons Number 28. Extensive and intensive properties Extensive and intensive properties So this is also the same page number. Mask depends on the mask; the mask is independent of the mask. Go and check it on page 64 And Yes Iso Bering and Audio Batic Press is correct. Please also check page number 65 to confirm that both are very acidic. What was asked about enzymes? Just a brief definition was needed, and you'll find it on page 314. You were asked to provide many large, heavy, transuranic elements. You were given elements beyond uranium, those with atomic numbers higher than 92. He told us about the transuranic elements. After that After that, from Chapter One Numericals I was and very aged numericals It was just to do it based on a formula. Alright, the thing is, all the kids will keep doing it. The numerics are fine. Given for two marks, the rest What was given was on nanoscience. The current visual definition of nanoscience will be found on page 334. And Polyacryl Nitrite After that, you were asked It was your page number 127. It would be wrong if the child, confused, were to do something else instead. It was necessary to do 127 things. And last, what did I ask you? Peroxies What is mono sulfuric acid? How to see it. You will see it. A pair of electrons and geometry First Nickel Cl 4 2- One that is chlorine And cyanide The filth of hell Weak, feeble What will happen in Lech? Just see for yourself, what will happen in strong pelicans? You can do that. So first, calculate its oxidation state directly. Alright, a straight oxidation has come in, two kurru. If nickel had free digets, you wouldn't need to take two, you'd save seven. How will you fill it? 1, 2, 3, 4, 5, 6, 7 6, 7 8, 8, sorry 1, 2, 3, 4, 5, 6, 7, 8 So, how many lone pairs of electrons are left? 2 2 lone pairs of electrons remain So you're asked how many lone pairs of electrons will remain So you can tell me this Look at its structure, what is it? Tetra Headrels' structure from You feel attracted to it, and I feel drawn to it. And later, in which one did Karnuvar awaken? In ethylene The first option was rejected. The first question given was one in which he was stuck. The second one that you Cyclohexane has been given. While the reaction that will occur will not be from cyclohexane. Who will get these cycles, Hedge? What has been given to you, Cycloheximide A has been given to E, meaning the entire single bond must be made. which is not possible for Mnofar and Stressofars to react to If double bond remains, it will break down to form adipic acid. So, there's a problem with this question itself. If your luck is favorable, then Whatever marks you receive in this will be given to you. So thank you for watching this video Please like and subscribe to this channel, thank you