 Okay fine so students I am starting first question is in front of you and Hydra's copper sulphate can be made by hydrated copper sulphate which can be added in anhydrous copper sulphate to turn into hydrated one to turn into hydrated one hundred percent accuracy expected yes I think anhydrous copper sulphate you have and you need hydrated one fine all questions in all the questions you have only one minute okay now just a minute I think most of you have done right only answer is D okay fine A is not the answer answer is D only don't worry don't worry answer is D I'll change it don't worry okay I'll change it in one minute just just okay fine answer is D only answer is water so now those who have answered it water it's all correct okay fine now moving to the next question so any doubt whenever you have anhydrous because while reading the question I read it other way around like I read it like how to convert hydrated to anhydrous how to convert hydrated into anhydrous any idea anyone who can tell me hydrates hydrated into anhydrous okay you can heat it what else what else okay can you add concentrated S2SO4 also yes okay fine students you can see my screen now okay fine so those who have answered it this I have marked it right okay answer is D only moving to the next question don't worry quiz is not close can you see my screen all of you yes could I move to the next question yes or no fine next question which of the following is our true for HCL gas is passed through water when HCL is passed through water okay students option 1 2 3 4 represent A B C D HCL gas is passed through water okay it's very easy question and I think you all can answer so in last question we did not get 100% so I'm not expecting 100% in this also but at least I'm expecting good percentage of right answers let us see what is going to happen in this question everyone voted and answer is C very good students it gives you hydronium ion and that's it it gives you hydronium ion any doubt in this question it don't give you OH-ion gives you hydronium ion no doubt I'm moving to the next question fine we'll see the leader vote and then we'll move to the next one if anyone has a small doubt you all can ask at any time okay okay good arian yashash sai moving to the next one this question says identify the correct representation of reaction occurring during the chloralkali process chloralkali process is some process in which you make sodium hydroxide using NaCl so according to you what should we answer when chloralkali process it is very important question as far as NCRT is concerned or CVSA is concerned don't worry you should be very perfect in answering this question if you are taking time it's fine but don't make mistake you have 26 more seconds left to answer this question chloralkali process you know it is a very important process because you take NaCl and water to make the sodium hydroxide and chlorine and hydrogen and we are going to see yes we are going to see the answers answer is D my dear students do you want me to explain do you want me to explain this question explain okay fine so moving to the question so this is the question if you see this is the question identify the correct representation of the reaction occurring so question is very easy most of you have marked answer C I don't know why you are marked answer C answer is D you take an aqueous solution whenever you take water aqueous solution of NaCl is there and why you are writing Cl to aqueous you know actually electrolysis happens this is electrolysis is carried out for NaCl so you get two gases Cl to gas and H2 gas one at cathode and one at anode which which will release at anode and which will release at cathode who will answer what will be the product that cathode and anode try to understand this Cl minus you have NaCl Cl minus is going to Cl2 is it oxidation or reduction Cl minus to Cl2 is oxidation or reduction change in oxidation number increase in oxidation number is oxidation increase in oxidation number is oxidation oxidation always happen at anode always remember I remember it like O A O A oxidation always happen at anode so at anode you will get chlorine gas and at cathode H plus because you have taken X H2O it is X plus and it is giving you hydrogen gas yes tell me yes samrat you want to say something H plus is going to H2 reduce in oxidation number plus 1 to 0 if plus 1 to 0 it is reduction and reduction happens at cathode so it is H2 gas both are gases and both are not soluble in water so that's why I gave this question is it clear to all of you question seems very easy but you can see that answer is just 35 percent okay fine moving to the next question hope you learned these things with the help of this question I have told you little bit about electrolysis O A thing oxidation always anode change in oxidation number of increase in oxidation number is oxidation chloride ion hydronium ion X plus a hydrogen ion and chloride ion hope you understood this moving to the next question if anyone has a small doubt please ask otherwise I'll move to the next question next question is in front of us we'll see the leader board and then we'll move to the next one are you all ready for next question yes very good abit Shah Aryan Varsha good okay Varsha is from which batch Varsha are you also from chick CHK okay so all CHK students are leading as of now good students but don't worry students all other students you can it may be new for you many of many of you don't know these concepts also don't worry we you can learn now I know that I have not covered these things in class but you can learn it now bleaching powder is soluble in cold water giving a milky solution due to giving a milky solution bleaching powder now you would think so what is bleaching powder for your to help you bleaching powder is CaOCl2 nothing and something is milky milky solution is forming you can think of it okay students answer is nothing but B fourth answer is B oh my god fine now see how to answer this question so question is this bleaching powder you know what is bleaching powder bleaching powder is CaOCl2 it formed with the help of CaO which hold twice plus CaCl2 these are the two components which makes bleaching powder this is bleaching powder if you if you want to know what is cation and anion cation is Ca plus 2 two anions are there OCl minus and Cl minus there are two anions in bleaching powder OCl minus and Cl minus now this is a bleaching powder okay lime present in it yes you know this is the reason why carbon dioxide when passed through lime water it turns milky do you all of you remember I think yes okay there calcium carbonate forms but lime cold water giving a milky solution because of presence of lime okay so lime is present which gives the solution milky yes so okay now bleaching yes in cold water in cold water you will get the this thing because lime is present and with the cold water you will get the turbid solution okay okay one minute just a minute okay fine so those I think many of you have not learned the reaction of bleaching powder with any other solution so but you can understand it see just one minute okay see what happens when you have the bleaching powder it is it is formalize Ca OCl2 so here also you will get the chlorine chlorine is there chlorine is there which is creating a solution you know the properties of bleaching powder okay I will do one thing I'll explain this after in the last of that okay I want to explain two three properties of bleaching powder I will explain all those things I will at one time only otherwise I think I should first finish that then I will come to this don't worry I will come to this question again okay first we'll finish this then I'll explain two three properties of bleaching powder so that will clear you all your doubts okay so okay one so next question we'll come to that we'll come to that next question is plaster of paris is made up of very easy question yes so you have 30 more seconds 20 more seconds okay students most of you got it right very good we'll see the leaderboard first then we'll move to the next question okay fine this was very easy question but still I didn't got didn't get 100 percent okay washing soda washing soda has the formula you know bleaching powder washing soda all these are very important compounds and this is a very famous compound also because of its water of crystallization because of its water of crystallization this compound is very very important okay now the answer for this question is sodium carbonate plus dot 10 H2O very very important compound sodium carbonate dot 10 H2O don't write any number of H2O these H2O are known as water of crystallization I explained in first chapter also I explained in first chapter that it is water of crystallization and it is fixed in number so dot 10 H2O is the correct answer NA2CO3 dot 10 H2O is it clear to all of you could we move to next question yes or no fine okay what is the what is the green vitriol formula green vitriol green vitriol formula who all can answer no okay very good FE SO4 dot 7 H2O that is the green vitriol the seven is very important what is blue vitriol blue vitriol very good here you have five H2O so remember these numbers it is very important very good students moving to the next question please read question carefully before answering plaster of Paris hardened by plaster of Paris hardened by those who don't have any idea for them I will tell you plaster of Paris is nothing but a hemihydrated calcium sulphate hemihydrated calcium sulphate how to harden it if you if you have ever seen the plaster of Paris you must able to answer this question plaster of Paris is hardened by which process okay you have 10 more seconds okay answer is if you add a small amount of water you know what happens with the plaster of Paris okay I'll tell you just coming what happens with plaster of Paris you know this is the question you know plaster of Paris is nothing but calcium hemia calcium sulphate hemihydrate what is calcium sulphate hemihydrate it is something like CA SO4 what is the formula plaster of Paris who all can answer fast for our plaster of Paris very good dot half H2O this is plaster of Paris when it combined with one and a half molecules of water it forms something called as something called as something called as gypsum very good it forms gypsum okay KRM students don't worry you I know that you people don't know this but you will learn all this and now now you can learn this it is nothing but gypsum is it clear yes or no fine moving to the next it's a very hard it's very hard okay this is not that much hard there is some hydrogen bonding and all are the reasons will not go in that detailing part you know once it was asked that draw the structure of calcium sulphate dot 5 H2O it was asked in GE IIT GE its structure is very much complicated but later you will understand yes exactly water is given out you know when you want to make plaster of Paris you need to heat it when you make plaster this is called as POP also plaster of Paris or POP when you heat it you will get the gypsum when you heat gypsum you will get POP and when you add water you will get gypsum yes yes by losing water add 373 Kelvin exactly if you okay now try to understand you have to be very much careful while heating the gypsum to obtain POP because you need half water of crystallization if you keep on heating what will happen the whole water molecule will go out and you will get an hydrous calcium sulphate you will get an hydrous calcium sulphate if you keep on heating this and on further heating you will definitely know your calcium sulphate will also start dissociating is it clear you are adding water you are not giving out water I hope you understood this all of you understood okay fine moving to the next question first we'll see the leaderboard very good Shri Jani, Anike, Meghra, Avicha good going oh very good Shri Jani fine moving to the next question a solution react with crushed egg shells to give a gas that turns lime water milky the solution contains very easy question you need to think little bit on this okay why Shri Jani okay common sense will answer here yes you can say that but still fine though I discussed this question this type of question you know egg shells have calcium carbonate egg shells have calcium carbonate and when you make calcium carbonate react with HCl you will get H2CO3 do you remember this reaction do you remember this reaction just on the next students do you remember this calcium carbonate with HCl gives you what is the product CACl2 balance it plus H2CO3 will form by double displacement by double displacement H2CO3 will form but H2CO3 will break down into H2O and CO2 and this turns lime water milky lime water milky now like lime water is CaOH whole twice and when it is react with CO2 you will get CaCO3 okay lime water milky is it clear to all of you okay now you know in the previous where we discussed the lime water there there also you got the milky solution actually this lime water is also little bit white it is not purely soluble in water so those students who were asking sir because of formation of calcium carbonate in decision number two there was no there was no carbon source of carbon so there is no point of formation of calcium carbonate because you took leaching powder CaOCl2 there is no carbon in that but this CaOCl2 also break into CaOH whole twice and HOCl this is also milky this is also milky or if you see this lime water it is having a white color so this is also milky but calcium carbonate is milky white precipitate will form term PTT will appear understood so whenever you want to test CO2 you pass it through calcium hydroxide you will get calcium carbonate white PTT this is precipitate this is not precipitate this is less soluble base where you know that's why we say calcium hydroxides are very less soluble base it is less soluble means something remain undissolved that is white in color hope you understood this would i move to next question yes or no hello okay fine any doubt any doubt no fine moving to next question moving to next question first we'll see the result okay seems like magna is leading the style anicate gupta very good anicate anicate which batch okay alums is an example of now if you know about alums then only you can answer this question if you don't know you can't answer this question so if you have ever heard about alums these are also salts alums are also kind of salts it could be acids also you think if you have heard about this okay fine so alums are what which type of compounds alums are last 15 seconds students you know all are every centum are and giving you a different set of crystal related to this chapter only so that you can be prepared for any set of exams okay answer is alums are nothing but a mix dissolved now you will ask for what is mixed salts okay i helped you by telling the world salt in the uh when i was talking about the question i know many of you have answered because of that but if you know also it's fine what is the alums you know alums are like one is the very famous alum that is potash alum potash alum what are the alums alums are the mixed salt mixed salt or or you can say the double salt they are the double salt double salt means the combination of two salts are called as double salts example two salts combination of two salts are called as double salt means a2so4 dot al2so4 whole thrice dot 24 x2o this is the there are two salts present k2so4 and aluminum sulfate so mixed these two salts are known as when there are two salts we call it as a double salt and they are called as alums this is actually a potash alum this is actually a potash alum potash means potassium and there is a aluminum there is one more there is one more compound which is which is known as mohar salt you will learn you will learn this in class 12 mohar salt that is also a double salt formalize ammonium sulfate in place of potassium you will get ammonium that's it ammonium sulfate now iron sulfate dot 6x2o you will have sulfate in common in these alums sulfate must be there ammonium and iron is it clear to you so two simple salt always form double salt and that is nothing nothing but called as alums any doubt any doubt could i move to next question sure if anyone has any small doubt you can ask don't think your friends are not asking so you should also remain quiet no doubts i'm moving to next one if anyone has any doubt please ask fine next question okay now this is the leader board good arian aniket megana moving to next question which of the following is quick line you can answer it quickly what is the quick line you should not take much time please answer it fast what is quick line okay students last 20 seconds okay fine okay answer is answer is c a o now i want to ask you one question as quick line is c a o what is slave line what is slave line formula slave line c a o as whole twice very good that is slave line okay what is what was the third one c a c o 3 what is its common name c a c o 3 c a c o 3 common name no limestone very good don't write marble limestone one is slave lime one is lime quick lime one is limestone what was the last one c a c l 2 dot 6 h 2 o what was c a c l 2 dot yes yes xl have c a c o 3 what is the what is the name of c a c o 3 dot 6 s 2 o any idea why i gave this question to tell you the names of all the compounds c a c o 3 dot 6 s 2 o name is this is that compound tell me what is name of this okay just think about just think about pop what name what is the name of pop what is name of pop plaster of paris name is calcium sulphate hemihydrate calcium sulphate hemihydrate what is the name of c a c l 2 dot 6 s 2 o think very good answer is calcium chloride hexahydrate understood how to write name of the compounds this is how we write the names and these are the names whenever you have the water of crystallization okay fine students we are going to move we are going to solve next question now any doubt in this do you have any doubt no no there is no we don't have a common name like that's this is the calcium chloride dot hexahydrate we say understood any other doubts no doubts sure could we move to next one fine some marble okay marble is c a c o 3 marble is calcium carbonate itself yes means major constituent is calcium carbonate only in marble any other doubt you know that's why that's why when you have a calcium carbonate and with acid rain you know that marble marble monuments are getting eroded because of or or that that get corroded because because of the acid rain because in your acid rain you have h 2 s o 4 and this is nothing but marble so in acid rain why what will happen tell me why the marble monuments get eroded due to the acid rain who can answer okay because it will give you c a c s o 4 dot h 2 o plus c o 2 so reaction goes in forward direction it keeps on going in forward direction because c o 2 gas is forming and that's why that's why marble get eroded is it clear is it clear to all of you yes okay fine next is uh yes moving to next question we'll see leaderboard first snaya please mute your mic yeah this is happening in to Taj Mahal you must have heard that Taj Mahal uh that thing is deteriorated because of this acid rain only okay same thing happened with HNO 3 also in place of HNO 3 what will be the product what will be the product if HNO 3 is there calcium carbonate plus HNO 3 double displacement no no nitrate will form calcium nitrate like this calcium carbonate plus HNO 3 if it is a diluted one not concentrated one what will be the product calcium nitrate whole twice two times plus H2O plus co2 is it clear to all of you is it clear yes fine moving to the next question very good aniket arian mega plaster of paris is obtained by adding water to calcium sulphate same good option by adding sulfuric acid to calcium hydroxide not bad by heating gypsum to very high temperature oh gypsum we have learned few minutes back we learned about gypsum okay by heating gypsum to 273 Kelvin maybe we must have heard about something heating but we don't know what is the answer in this case let us see okay please use your brain think what will happen when calcium sulphate is added to water okay students answer for this my dear students this time i'm expecting 100% result oh my god students this thing i told you in previous question gypsum is oh my god see one minute okay okay okay just a minute sir one doubt isn't gypsum heated to 120 degrees Celsius to get me okay and not 100 in the Celsius 3 70 Kelvin approximately 100 degrees okay so uh now what is your doubt in this so should we turn this thing that 100 degrees fine means it's around around like you should not see options if you go around the temp temperature option is given i i think i discussed this point in previous question if you heat this to very high temperature if you heat this to very high temperature your calcium hemichydrate means you will not stop the reaction at or you can't stop reaction at calcium hemichydrate did you understand yes or no so if you want to you you have this reaction let's say calcium sulphate dot 2 h2o and you are heating this and you want to stop reaction at calcium sulphate dot half h2o and your one and a half h2o water will leave the compound yes so now now here uh if you make if you heat it with very high temperature what will happen if you heat with very high temperature if you have to think about the best options okay uh if you go and the if you see the best option what is the best option if you heat a very high temperature if you heat at very high temperature what you are going to do it will be calcium sulphate dot 2 h2o okay and this may also dissociate so generally we say it should be around 100 degrees Celsius okay there is no fixed temperature you can't say it's a fixed temperature but in general we say it's a 373 is nothing but 100 degrees Celsius okay so you can say around 100 degrees Celsius you should heat the calcium sulphate dot 2 h2o is it clear any doubt one minute if you have any doubt please ask uh so why is plaster of paris called okay you will learn it later plaster of paris will say well i'll tell you what is the reason the end any other doubt because it was always yes what else it was used to cover walls and buildings in paris yes yes yes okay what any lot any any conceptual doubt first please clear that then i'll clear your other doubt yes one minute it is used in the yes any other doubt uh is it clear someone asked me about the temperature what was your name what is your name please tell me please tell me your name anirudh anirudh is it clear it is around 100 degrees Celsius but if say if they say 110 you won't say no no it won't form there are chances it will form but that's why the option is quite clear gypsum to very high temperature will break will break the compound and remove all the water understood so generally they keep the 100 degrees Celsius is it clear anirudh yes okay fine moving to the next question what happened ananya okay it's no doubt fine okay next question of the solute aqua solution listed below which would be the best conductor of electric current you have just one minute which would be the best conductor of electric current concentrations are given to you concentration is m think it's very easy question no no m is not more it is a kind of more only okay fine it is kind of more nothing it is kind of more only yes it is molarity but those who don't know molarity they can consider it more then solve then also you will get the same answer okay time sir let us see how many of you got the same answer how many of you got the correct answer oh 34 of you have marked it right very good students this question is very easy you need to think like okay first of all i want to tell you what the molarity is molarity those who don't know molarity is nothing but moles divide by volume moles of solute divide by volume of solution this is molarity okay why i said that you can consider moles only let's say my volume is one liter if volume is one liter if volume is one liter implies molarity is equals to moles that's why i told you molarity equals to moles now you need to think which will be the best conductor of electricity there are two things which can conduct electricity there are two things only one is electron two things can conduct electricity always remember no other thing one is electron and second is ion there are two things which can conduct electrons can't conduct an aqueous solution very rarely very rarely they conduct electricity so not in aqueous not in aqueous solution but they conduct in which case tell me where they conduct electricity electrons where they conduct in metals in metals you have electrons as a conductor but there is one more thing which can conduct electricity are the ions these ions conduct electricity in aqueous solution in aqueous solution they conduct electricity now the question arises sir fine more the ions more will be the electricity conducted yes or no can i say like that more the ions more will be conduction now you think which among these will give you the more number of ions which among these will give you the more number of ions okay now you have to think so this is hcl strong acid strong acid completely break hcl completely break into h plus and cl minus two ions it is giving so one molar if i consider one mole of it is it is giving one mole of h plus because i have taken one mole of this if you take one mole of this you will get this one mole and this one mole so total two moles ion total two moles of ions okay fine we'll see the next option b b is nothing but what is the b c s 3 c o o h please check is it the acetic acid please check am i right is it the acetic acid yes or no no b option b option is c s 3 c o o h only they have written in different way just just look at this c s 3 c o o h it is weak acid it is weak acid so it will give you c s 3 c o o minus plus h plus but it is in the reversible since it is a reversible reaction yes you can write like this you can write like this what is actual difference in option a and d we'll come to that we'll come to that first you tell me did you understand the did you understand that it is not giving you two moles could i remove this could i erase everything could i erase everything if you understood whatever i have done i want to explain b c and d okay fine so if you see the option b b is nothing but acetic acid it won't break or it won't dissociate hundred percent it will dissociate but not hundred percent so out of one mole you can say it will be it will dissociate let's say 40 percent in dissociate so 0.6 moles of this you will have 0.4 mole of this will have and 0.4 mole of this you will have means out of one mole if 0.4 is breaking down 0.4 will form 0.4 will form total moles of ions how much total moles total moles of ion quickly tell me students what total moles of ions i'm just giving you an example not hundred percent dissociation yes total moles of ion 0.4 mole of c s 3 c o minus and 0.4 mole of c s h plus 0.8 mole very good in a part in a part i told you h c l gives you h plus plus c l minus you got one mole and one mole total two moles ion two moles ion this means that answer is not b answer is not b this is very clear moving to the option c alcohol alcohol is nothing but it is dissociating very less same thing dissociation not hundred percent dissociation not hundred percent dissociation so this is also not our answer last is h c l o my dear student h c l o 4 is very strong acid h c l o 4 is very strong acid it dissociate hundred percent very strong acid but who told you h c l o is a strong acid it is weak acid h c l o is a weak acid it won't dissociate hundred percent yes h c l o 4 is very strong stronger than h c l h c l o 4 is very strong acid understood any other doubt so h c l o is a weak acid if i would have given you option h c l o 4 then that would be that would have been our answer but option has h c l o that is a weak acid hope you understood this question okay h c l o 4 is quite very strong acid we call it as a strongest acid okay so h c l o 4 h i o 4 all these are strong acids only but h c l o 4 is quite very very strong acid the correct correct okay what is ph ph depends on concentration ph depends on its concentration understood what about aqua eeja that is not as that is that is a very good oxidizing agent aqua eeja is very good oxidizing agent definitely that is also a strong acid but its major purpose is to oxidize something not to neutralize something yes that is also acid because it is formed by acid and acid that is also acid but it is oxidizing agent so it oxidizes everything okay don't worry aqua eeja is nothing but h c l plus that's a mixer of h c l and h n o 3 we use to dissolve gold we use to dissolve native metal to dissolve native metal we would we use aqua eeja don't worry next chapter metals and non-metals i'm going to discuss this in detail okay could i move to next question could i move to next question okay okay ph could be negative i will tell you in which case you know the actually practically practically saying it's not possible but theoretically you can get negative values if you have a very very concentrated thing means it's kind of solid only then you can get the ph negative but practically it's not applicable because as soon as you add water it will have some concentration but theoretically you can say it is possible understood okay next question okay fine so two more questions you have i think please read this question carefully and then answer whatever concept i applied in previous question please apply it here whatever concept i applied in previous question please apply it here i told you something about concentration in last question okay last 10 seconds my dear students this question was very easy i am assuming that 100 percent results will be there let us see oh my god 27 only fine question was very easy my dear students i told you in the previous question see i told you when CS3 COO as breaks it will give you one mole one mole here 0.6 of this will 0.4 is breaking here it's 0.4 mole is breaking it will give you 0.4 and 0.4 because the stoichiometry is one and one stoichiometry or coefficient is one and one try to understand i'm moving to the next question try to understand how to solve that this is the question NA3 PO4 whenever it breaks if you write a balanced chemical equation it will give 3 NA plus ion and PO4 3 minus ions now same thing molarity is molarity is moles divide by volume let's consider volume as one mole volume is one liter sorry just assume volume is one liter this means molarity equals to moles molarity equals to moles if you can say molarity equals to moles you have 0.250 moles if you take 0.250 moles my dear students tell me if 0.250 will break how many NA will form if one NA3 PO4 gives you 3 NA plus 0.25 moles will give you how many NA plus 0.75 0.750 moles this is answer any doubt if anyone has any small doubt please ask now this is the last there is one more question again fine aditya whenever you write the reaction when NA3 PO4 is a salt when it break down it it when it dissociate it will give you 3 NA plus okay how how if you take H2SO4 i'm just giving an example and because you have done this so many times when you have H2SO4 it breaks down what it will give you when it breaks oh two more questions okay okay students when H2SO4 breaks what it will give you 2 H plus plus SO4 2 minus same thing apply here why 2 H plus because 2 hydrogen you have here you have 2 3 sodium so 3 sodium ions am i clear am i clear aditya yes or no okay answer is 350 moving to the next question okay students i will skip the leaderboard this time i want to go to questions we don't have much time now okay fine which of the following is weakest base please answer it fast weakest base assuming 100% result this time because probably this is the last session for acid bases and salt probably this is the last one so i hope that you can okay i may take one more if i i'll bring some new concept in that uh sentiment also but i'm not going to take these things again what is weak acid weak base salt and all okay it's very easy last 10 second students okay my dear students the weakest acid is NH4OH weakest acid is NH4OH most of you have answered it right okay and CAOH whole twice is also weak but not weakest that is also weak sorry i i i i meant base sorry sorry i meant base weakest base is NH4OH understood last question okay this is the leaderboard and we are on last question who is leading oh great going students last question let us see who can change the leaderboard now which salt can be classified as acid salt acid salt which salt can be classified as acid salt very easy question just think of it okay last 10 seconds students okay acid salt i told you one day to remember basic salt and acid salt acid salts are those salts in which all the hydrogens are not leaving the compound my dear students acid salt is acid salts are those salts in which all hydrogens are not leaving the compound so this is acid salt actually it was S3PO4 earlier when it reacts with NAOH S3PO4 reacts with NAOH first one hydrogen is removed first one hydrogen is removed so it will form H2NAPO4 then H2NAPO4 H2NAPO4 further reacts with NAOH then it will give you HNAPO4 HNAPO4 then it further reacts with NAOH then it further reacts with NAOH gives you NA2NA3PO4 so overall we write like this whenever someone asks you write the reaction for S3PO4 with NAOH what you write three times of NAOH you do the double displacement NA3PO4 and water you do the double displacement directly PO4 go with NAOH minus go with H but these are the three steps so they have asked acid salts means the salt which has not lost all of all of its hydrogen so you are getting this compound so it is nothing but acid salt acid salt can i call this also as acid salt can i call this also as acid salt yes or no acid salt this is basic salt this is basic salt it has not lost is all over its minus this is basic salt is it clear this is simple salt simple salt hope you understood this hope you understood could i show you the results now okay fine student sorry for extending class and this is your final result and let us see who is it seems like Meghna is going to win let us see Momita or Meghna okay Meghna congratulations Meghna well done Aniket, Aryan, Momita, Sneha all of you have done great congrats to all of you now if anyone has any doubt they can ask me and those who want to leave they can leave okay students so i think all of you have cleared your doubts yes sir does it always remain H2 in a strong acid salt sir does it always even no no no hydrogen should be there let's say NAHSO4 NAHSO4 is also acid salt high L should be there for for acid salt for acid salt H should be there could you show third question third question fine third question is this just a minute this is third question this is the electrolysis of NACL gives you NAOH CL2 and H2 yes yes i told you fourth one in next in in in 10th question only i told you about the fourth question in 10th one only that bleaching powder is CAO-CN2 when you put into water it will give you calcium hydroxide this is actually not precipitate but it is milky white it is milky you know calcium hydroxide that's why it is not a strong base it does not dissociate 100% but it is milky in color understood no no calcium carbon there is no source of carbon where is the carbon in these two compounds nowhere you have carbon tell me nowhere you have carbon how you will get the carbonate understood 12th one okay wait but i move to 12th one all clear before this yes yes one minute 12th one is this okay my dear student 12th one is like a strong acid dissociate 100% so the things which will give you more number of ions that are the good conductor of electricity HCl break into H plus and Cl minus completely C2 CS3COH is weak acid CS3COH is weak acid that won't break into this completely not 100% means you will have less number of ions as compared to H plus and Cl minus because here HCl completely break into H plus and Cl minus but here CS3COH is not completely breaking am i clear same thing is applicable for all of these yes my dear student Na3PO4 is a salt of strong acid with strong base as means not strong base but it will dissociate 100% Na3Na plus plus PO43 minus okay you can say not 100% but extent of dissociation is not bad not bad understood but you can say it's almost 100% molarity is nothing but molarity is a concentration term it is nothing but moles divide by volume this you need to remember as a formula it is a concentration term moles of something divide by volume if I say two moles of NaCl I have added in 100 100 ml of water what is the molarity what is molarity 2 divided by volume in litre volume in litre is nothing but 0.1 litre so answer is 20 is it clear Arain Arain did you understand please take your time and reply okay students everything clear could we stop here yes okay thank you students bye hope you learned something today something new okay good bye