 All of you have joined and we'll start the quiz now. Fine, start the quiz. Already, first question is in front of you. You have only 30 seconds. Which of the following are mineral acids? Only 30 seconds. Look at the options carefully. A, B, C, C, D, D, A. Look at the options carefully. Look at the options carefully. Yeah Pravath, now I won't interfere. Yes, sir. Thank you, sir. Okay, options are given to you and nitric acid, citrus acid, formic acid and hypochloric acid. Okay. So answer is D, A and 35 students have answered it properly. So mineral acid were HCl and HNO3, citrus acid and acetic acid or formic acid. All are organic acid. Do you want me to discuss this question? If you want me to discuss, please put Y. Otherwise, I'll move to the next question. No? Okay. Anyone who has doubt? No doubts? Sure. Mineral acids are HNO3. Yes, explain is HNO3, HCl are mineral acid. H2CO3 is a mineral acid, acetic acid. CSBCOH is an organic acid. Citrus acid in the citric foods is an organic acid. Good students, I'm moving to the next question now. Okay, I'll show you in one minute. First you see the result, I'll show the question. Okay, fine. So question is this. I hope you all have seen the question. Question is in front of you. Okay, just a minute. I'll show this question after the next question. So first we'll go to the next question. Again, you have 30 seconds only. 30 seconds. Which of the following are property of an acid? Look at the option ABC, BCD, CDA, DAB. Property is of an acid. Okay, we'll see how many of you have done this right. So again, the graph is similar like the previous one. Okay, so if you want to see the question, question is, I'll show you question one minute. So first question was this. Which among the following, just one minute. Here, second one, I'll solve both of them. Just give me one second. Okay, so in the properties of an acid, okay this is the question. So question is, which of the following is a mineral acid? Nitric acid was the mineral acid? Yes. And what else? Nitric acid is mineral, citric acid is not. Citric acid is not. I'll cross it here. Nitric acid, formic acid is not hydrochloric acid. This was the first question. I hope you understood. Moving to the next question, moving to the next one, that is, which of the following is a property of an acid? All acids have a soul taste? Yes. You know, as because of the word, acid came because of the sour taste only. Acids are sour in taste. Okay, next, acid turns blue litmus red. Do acid turns blue litmus red? Yes. Acid turns blue litmus red. Okay, what else? Acid turns red. Okay, and all acid carnage H plus? Yeah, all acid carnage H plus in water. So answer is A, D and D. Any doubt students? Any doubt? How do you define an organic acid? Very good question. First, you should know what is the organic compound. Organic compounds are those compounds. Organic compounds are those compounds which are made from hydrocarbon and its derivative. Hydrocarbon and its derivative. And its derivative. Derivative means, what do you mean by derivative? Let's say you have a hydrocarbon C-H4. This is a hydrocarbon. This is an organic compound. Derivative means if you replace all the hydrogen with chlorine you will get C-C-L4. This is also an organic compound. This is also an organic compound. Now what do you mean by organic acid? The acid forms sondra, organic compound. Is it clear? Acid formed by organic compound is organic acid. I hope you understood. Any other doubt, please write E-R. If you have any other doubt, please write E-R. No? Fine. I am moving to the next question. Already? Yes. So, next question is in front of you. First we will see the leader board. Okay, fine. Next question. Again 30 seconds. 30 seconds. But questions, you have to read the question carefully and then answer. Which of the following is a weak base? Weak base you have to think. ABBCCDDA Weak base ABBCCDDA Which all are weak bases? Okay. Answer is ammonium hydroxide and magnesium hydroxide. So answer is CD. Ammonium hydroxide and magnesium hydroxide are weak bases. If you remember I told you one thing. Group 1 Lina Ki Rabse Pariaad Do you remember group 1 metal from the strong base? Group 1 metals are strong base. But rest of all are the weak bases. Do you remember? Okay. So we are moving to the next question. Okay, any doubt? Please ask. No? Okay. Good. Next question. Good going students Abhipsha is again abhipsha is reading as of now Okay Pushy abhipsha Very well, good. Okay. Let's see the next question. Please see the timings Which of the following compounds are basic in nature? Basic in nature Okay, 45 students are answered it properly. Basic are the two compounds which are basic like you have to think Which are formed by strong acid weak base. Okay, any doubt in this question answer was basic Any doubt in that basic compound the two salts which were copper sulphate Copper sulphate was neutral. A copper sulphate is not basic and there was one more that is calcium sulphate Calcium sulphate is made up of strong acid weak base. Calcium sulphate was strong acid weak base Okay, salt can be basic Okay, salt can be basic in last class. I told you Calcium if you remember I told you one salt, which is a basic, basic calcium carbonate. That is the basic salt Okay, but rest over the salt which were neutral. So that was not the answer Next question Next question. Let's see Which of the following compounds are neutral to litmus? NaHCO3, NaHCO3, NaHCO2 and CaOH2 are neutral to litmus Okay students why you did this question wrong? NaHCO3 is made up of strong acid weak base NaHCO3 is made up of strong acid weak base. So that is not neutral. That does not be the neutral salt Yes or no? NaHCO3 is made up of H2CO3 weak acid and NaOH is strong base This means that it will not give you the, it will not give you the neutral, it will not remain neutral to pH paper or litmus paper It will wait to change the color and second one is NaHCO3 and what was the next one? What was the next compound? What was NaHCO3 and what other? Okay, one minute I will show the question Okay students do you feel the time is less because I thought that questions are very easy that's why I kept time very less Do you think time is less or it's fine? Okay, okay fine this was the question No basic, this was the basic that question The question is which of the following is litmus, neutral to litmus NaNO3, NaNO3 is NaOH plus HNO3 Strong acid is strong base, strong acid is strong base, strong base is strong acid So it is neutral to litmus NaCl, NaOH and HCl, strong acid is strong base Strong acid, strong base that is also neutral base, this is base, it is not neutral NaHCO3, NaOH plus H2CO3, these are the salt and these are the acid and base So it is again, this is overall it is, okay what will be the pH? Is it less than 7 or more than 7 for NaHCO3? pH will be less than 7 or more than 7 for NaHCO3 No why less than 7 my dear, NaHCO3 is made up of strong base and weak acid Strong base means and if base is strong means overall it is solution is basic If you put, what do you mean by base? When you put NaHCO3 in water, when you put NaHCO3 in water And then you calculate, then you check the pH, pH will be greater than 7 Because your NaHCO3 is the salt of strong acid, weak acid strong base Is it clear to me? Yes? Yes or no? Okay fine So answer is, here if the pH is greater than 7 and here the pH is also greater than 7 So it is not neutral It has H plus, yes it has H plus, you can call it as acidic salt You can call it as acidic salt But the point is it is a base, very interesting You can call it as acidic salt because it is having acidic hydrogen But the point is it is a base, salts, why it is a base? Because in putting into water, on putting into water it can absorb the hydroxyl, hydronium ion When you put it into water it can absorb, because what will happen when you put into water? NaHCO3, when you put it into water it will form, what it will going to form? NaOH plus H2CO3, but we write H2CO3 like H2O and CO2 So overall it is a base, when on putting into water So this NaOH will act like a base, this NaOH So actually the salt is base, this is a base But the point is it is acidic salt because it has a hydrogen Yes Okay acidic because of the hydrogen, because of the hydrogen we call it as acidic salt Understood? Is it clear? You know basic salts are those which are OH minus in that, we call them basic salt Hope you understood this Moving to the next question, metallic oxides are basic, very good It is correct, metallic oxides are basic in nature Okay any other doubt? No? Very good, this is the result Okay, now next question Acids and bases are important because of Acids and bases are important because of what reason? Okay fine, let us see how many, let us see how many of you have done this question Very good, 38 How important? Okay one minute, D, A, D, yes Fine, okay we will see Question number 6 We will see how to do this question Yes Acids and bases are important for industry The answer is A, they are used in industry Acid and bases are important because they are used in industry Yes, there are effects on human health Yes we know that acids and bases have an effect on human health They are used in utilization to form salt, there are effects on farmer crops Okay now So you know they have asked about acid and bases Okay, you can ask this even in farmer crops as why important is bad effect Okay see bases do you think how base impacts on farmer crop You know because of farmer, okay if you think about crop you need nitrogen It is not necessary that you need base In all the three cases bases are important, again I will say Listen, listen If I want to select the best three or best options I would not select C option, why? Acidity is fine But they have said acid and bases are important Acid and bases they have asked are important So for farmers bases are not very important Do you think bases are important for farmers? Acid is important, okay but D is the least important There is a utilization to form salt, it is very very important Otherwise how you are so very important Utilization is very important Let's make one minute I will do one thing If I If I go back If I go back, okay so Okay the question number 6, yes 1, 2, 3 4 and 5, 6 Okay I will make ABCD all correct, but okay there we don't have the option So what I will do, I will put all of you as a correct only Is it fine, is it fine if I put all of you as a correct Yes, okay fine I will put all of you as correct, okay now continue One minute, okay fine Okay just a minute, let me check if it If it consider everyone as correct, okay Fine it is correct, it is considering everyone as correct Okay, all happy, this was not the question Okay this is a different question, just a minute student Just a minute, I think I discussed question number 6 Yes, one minute, question number 3 Okay just a minute, 2, 3, 3 4 and 6 We were discussing the 6th question, if you see the question As in basis are important Yes this is question number 6 Okay fine, so one minute Just leave this 6th question only Okay leave that question students, don't bother about that Yes it is the 11th side, some make not Make not correct, okay fine no problem, you all got marks Why you are worried, okay we are moving to the next question, don't worry Okay, is it fine? Yes So next question is, okay don't waste time students, I am moving to the next question So next question says, so Here is the next question, be ready for that Okay, so yes, next question is in front of you One minute, okay one minute Just a minute students, yes I understood I understood students, I understood, one minute Now I think we are in the next question And again this is the answer which we got Next question, okay okay, this question is this Okay one minute, still where we have to go, next question Okay one minute, 10, 6, 2, 4 Next question, assets produce the hydroxyl ion Assets produce the hydroxyl ion, produce the hydronium ion And proton donor have low pH, please answer this Okay, assets produce the hydroxyl ion, produce the hydronium ion Our proton donor have low pH 7th answer is, okay 7th answer is BCD I don't think that this question you should Those marks, very good, all of you got the answer, I think no doubt in this One minute out, no? Okay, fine, so we will see Oh, Abitra is reading, no, no, just sign Creti SSR, very good Creti, next question Basis forms the hydronium ion in liquid solution Form the hydroxyl ion, our proton donor have high pH Value, again 30 seconds, but you could finish it 5 seconds, don't worry, these are easy questions Good questions are coming up to one, okay, just one more question This is the MCQ base, that's why I gave all this Okay, bases are not proton donor They are proton acceptor, bases are proton acceptor Hydroxyl ion donor, yes any doubt pH is greater than 7th Okay student, do you have any doubt, please ask You can ask your doubt if you have any Sir, could you show the question 7, and I am definitely Abitra Just after this, I will, whenever you have Most of the students have doubt in some question and that time only I will show you question over current Any other doubt, no? Sure, Abitra I will show you question number 7 Just after this, okay next question The hydroxyl ion may form by acid bases Water gaining a hydrogen ion, water gaining a hydrogen ion And alkali, last 10 seconds Okay, answer is alkali, answer is BD BD, okay, I think I Okay fine, I will show you both the questions in one minute If you have doubt, it will get clarified, just give me one second Fine, so first question was, okay 7th question Any doubt, one student asked me, Abitra please see if you have any doubt Answer of 7th is BCD, BC and D BC and D, any doubt Abitra Okay, very good Abitra, next question Next question I am going to, pH 1, bases forms Okay, question number 8, any doubt Hydronium ion is H3O plus Hydronium is H3O plus, hydroxyl is OH minus It does not form hydronium ion, bases form OH minus ion And it is proton acceptor, not proton donor, pH is greater than 7 Any doubt, no doubts? Could I move to question number 9? Question number 9 is in front of you, just give me one second Okay, you will see the result first Okay, question number 9, any doubt is a strong base because Why is it a strong base? It gives OH minus It can be oxidized, the ion ionize almost It ionizes almost completely It ionizes almost completely, it reacts with a strong protein Be very careful, this is the past year question So any doubt, question number 10 Okay, answer is AC and D Very good, okay Student, do you have a doubt in this? If I show you the question, it is very easy Just see, okay, I think because many of you have done wrong That is why I am sharing in one minute Fine, NOx is a strong base because it gives OH minus ion It can be oxidized, no, no, it cannot be oxidized NOx cannot be oxidized, ionize almost completely Yes, that is how we differentiate strong acid and strong base Ammonium hydroxide does not dissociate completely That is why I put the equilibrium sign But when any of us dissociates, we put a single arrow Because it is a strong acid Strong base, hope you understood Weak base, in weak base we put the reversible sign And it out, okay, that is why the acid property Yes, definitely, that is why it is strong Ammonium hydroxide will not destroy the acidic property with that extent Like ammonium, okay Even weak acid, weak base are reversible, right? Yes, yes, weak acid, weak base are reversible And it out, no, fine, next question Now we see the time and their answer, okay We see the time and their answer, okay, are you able to read the question? Can you read the question? Yes So the question is, compound X is tested And the result are shown in the table, test is given and result is given Equus sodium hydroxide is added, then heated gently Result is gas given up, which turns them red litmus blue Next is, dilute hydrochloric acid is acid Added effervescence given, which turns lime water milky Which ion are present in compound X Ammonium ion, carbonate ion, ammonium ion, chloride ion, calcium ion, carbonate ion, calcium ion, chloride ion Do you want me to, okay, any doubt? I think all of you can see this question misclicked, why Ananya? That's why I told you, please see the time What's effervescence? Effervescence is like, something is like whenever some gas is released from inside the water So you must have seen the vapors coming Vapors are, you know, the piss, which you see the piss type of thing Okay, fine, I need to discuss this question I think So the question is, very easy, you know, people have made mistake But it is very easy question, compound X is tested Effervescence is like, when you have, let's say some gas is going from this side and then the water So the bubbles of gas, which you see is the effervescence The bubbles of gas, which you see in the top is the effervescence Okay, effervesodium hydroxide is added gently Okay, effervesodium hydroxide, I told you one thing, very important thing Ammonium salt in presence of alkali gives ammonia This fact I told you in last to last class also Ammonium salt, ammonium salt with alkali always give ammonia If you have any sports here and you put any OH It will always give you ammonia and that Litmus paper turns them red to blue means it is a basic gas The gas must be basic in nature, that is nothing but ammonia gas Okay, and because there are two option is ammonium ion Calcium ion definitely not going to give ammonia, calcium ion is not going to form anything Which is basic and calcium hydroxide is heated Gas is given if someone ask you Okay, why this is wrong? Aqueous sodium hydroxide is added to any OHs So if it is a calcium ion, what will happen? Calcium ion plus any OH If you write also, that won't give you something which is like gas Which is basic in nature, there is no gas, no gas is relieved You will get COS worldwide, but what else? Nothing This means that calcium is not our answer, so answer must be from A and B Now this thing also I told in class, dilute acid is added Gas given lime water, milky gas is nothing but CO2 And CO2 is released when there is a carbonate ion and you add some acid When you add some acid and carbonate ion is there, it forms H2CO3 And I told you H2CO3 breaks into carbon dioxide Any doubt students? Do you have any doubt? Please ask Why it can't be B, chloride ion, very good question If there is a chloride ion and you are adding dilute HCl, nothing No reaction, chloride is already means nothing will happen It is a chloride is there in HCl also, chloride is there in HCl But when it is a carbonate and when it is a HCl It will give you H2CO3 which will break into CO2 and H2O Understood? Ok, any doubt? No? My next question Ok, next question Please read it carefully and Are you able to read this? I will read it for you The cation shown are identified by the colour of the precipitate form When an excess of an aqua solution X is added When an excess of an aqua solution X is added So cation presents are iron plus 2, copper plus 2, iron plus 3 Green precipitate, light blue precipitate, reddish brown precipitate What is X? Ammonia, lime water, silver nitrate, sodium hydroxide Still you have 1 minute Last 30 seconds Let me know if anyone is facing any difficulty in reading the question Because these are long questions I could do something for you if you are facing difficulty Last 6 seconds My dear student, the question was very easy And the answer is that Oh my God 20 students only have given the right answer Ok, just see the question What it says Cation are identified by the colour of precipitate Do you remember I told you very important thing These all transition elements are Hydroxides are precipitate All the hydroxides are precipitate Iron, Fe2 plus Sir, you can crop out the option And instead of putting it in a black box You can put it in the coloured MCQ boxes Ok, fine, I will see Ok, so See, Fe2 plus is there When it reacts with hydroxide ion When it reacts with hydroxide ion it forms FeOH whole twice I told you it is a precipitate It is green in colour Remember I told you last class Ok, Fe2 plus is green Generally form green precipitate Copper 2 plus generally form blue thing Yes, and iron form Generally reddish brown I told you, reddish brown thing Like rust Rust is nothing but reddish brown iron oxide So iron all 3 will form the hydroxide You know, Fe will form hydroxide like FeOH whole twice Copper will form hydroxide like Copper OOH whole twice Like this And reddish brown precipitate at FeOH whole thrice All 3 are brown This is brown, this is blue, this is black So answer will be sodium hydroxide Now, so again Ammonia if you put Ammonia can dissolve copper salt That's why it's not an answer If someone think like that So why not ammonia Ammonia can dissolve copper It won't form precipitate I told you in last class it will form complex with copper Form complex with copper That's why it won't form precipitate Lime water Lime water is CaOH whole twice CaOH whole twice is the lime water And then let's say Here also you need for the precipitate You need a strong base For precipitation you need a strong base Ok, strong base Lime water is not a strong base Silver nitrate Silver nitrate, no, nitrates of all 3 are soluble No precipitate Nitrates are, here you can write soluble Form soluble salt Form soluble salt For nitrate Understood? Any doubt? No? Fine Next question isn't This is a very important question That's why I spend too much time on this Ok, next question Ok, all ready? Next question is in front of you We'll see Oh sorry, fine Next question is this Which pairs of the aqueous ion Both react with dilute sulfuric acid To give visible salt Which of these pairs of aqueous ion Both react with dilute sulfuric acid Dilute sulfuric acid To give visible result Visible result You have to think which will form the Salt and giving you the visible result Visible result, you know It can be the change in color It can be the smell Visible result, sorry Smell is not the visible result Change in color, effervescence Something like that Precipitation Ok, fine So, answer for this question is My god Fine We have to discuss this question Now, this question is very easy Visible result my dear student Few minutes back I told you Whenever acid is dissolved in carbonate It will give you H2CO3 H2CO3 which breaks into H2O and CO2 Visible result Chloride will not give you H2SO4 with HCl Won't give you like anything It is not both are acid Nothing will happen Carbonate will give HCl Sir, can you wait for sometime Before showing the next question The score has not loaded Ok, fine I will wait So, this is the carbonate Chloride is not the answer at all So answer must be from carbonate Now you have to think which forms The precipitate with sulphate Barium or ammonium Ammonium sulphate is soluble Ammonium sulphate is soluble Generally all the salts of ammonium Ammonium are soluble Salt of ammonium are soluble Salt of ammonium ion are soluble Ammonium ion are soluble Ok, but Barium form the precipitate VASO4 White precipitate So that will you can observe Answer is B Sir, what is the one minute What is your doubt Where you want to see the result Won't we still see visible result We will see visible result in VASO4 We will see white precipitate Of VASO4 Even though it is soluble When it is soluble How you will see the visible result Because all our solutions There is no color change If there is a color change then we can say Is there any color change in any of the compound No one will change the color Understood Because there is no transition matter Ammonium sulphate is color less Ammonium sulphate is soluble Ammonium sulphate is soluble Any other doubt You can't see NH4 No, no you can't see You can't see NH4 NH4 whole twice SO4 Copper carbonate is blue in color Copper carbonate blue Any other doubt Ok So we will see the leader bone Ok Next question Element X form an acidic covalent oxide Which rose shows How many electrons there could be In the outer shell of an atom of X Element X form an acidic covalent oxide Acidic Covalent Oxide Which rose shows How many electrons there could be In the outer shell of atom X Ok Only 22 students have marked it right It is again a very easy question One minute students Oh sorry Sorry, sorry, sorry One minute Ok By mistake I have clicked exit Ok one minute I will go back Ok One minute Ok question was Just let me Skip all those steps Which we have already done I need to skip it fast Covalent, yes Now listen, listen I will explain the question Covalent compound they have asked Covalent means it should be Non-metal, non-metallic oxide So non-metals are in the group 6 and group 7 Yes or no Oh Group 6 and group 7 Yes or no So Covalent oxide are there in group 6 And group 7 One minute Ok next question Please do this question student 16th one When sodium react with water A solution and a gas are produced Yes yes no worries Do this 16th one When sodium reacts with water A solution And a gas are produced Sodium and water A solution is tested with litmus paper And gas is treated With a splint What happens to the litmus paper And to the splint What will happen to the litmus paper And a splint Sodium is there in water Ok I know Aryan I know Ok one minute Yes So I will explain this question first 34 students have answered it right Wait I will explain both the questions Then we will We will discuss the Ok so question number 14 First we will understand What is there in the question 14 See Because they have asked Covalent oxide Covalent are the Covalent oxide means Oxide formed by the Covalent metal Covalent metal means A Covalent element Covalent elements are the carbon, Nitrogen These are the Covalent oxides You will get more clarity When you will learn the chapter bonding These are the covalent oxide Chlorine All those And their oxides are acidic Carbon form CO2 which is acidic in nature Carbon form CO2 which is acidic in nature Nitrogen form NO2 which is acidic in nature Cl form ClO2 which is acidic in nature All these are acidic So what is the possibility They should be non metal 6 and 7 Number of electrons are there in carbon If you see carbon How many electrons are there in outermost shell Atomic number is 6 So outermost shell is 2, 2, 4 4 electrons If you talk about nitrogen 2, 5 If you talk about chlorine If you talk about chlorine 2, 7 So 7 is the answer It is also acidic and covalent Sulphur has Atomic number of sulphur is 16 2, 8 6 6 electrons Any doubt students Simple Acidic oxides Any doubt in this students Answer is 6 and 7 You can see this Sulphur dioxide is acidic and covalent And Very 7 ClO2 ClO2 is again acidic which is covalent Fine Yes I skipped one question When I was skipping all the questions At that time I skipped one question But I will show it to you later No worries First we will do the last question After that I will take you to the question number 15 also But first Finish the last question Should I go in the back Should I go to back What you say Let it be Next question And this is the last question But I will take you to the 15 question after this Ok NPSK Lux Do this question A solution contains barium ion and silver ion Which could be the anion D A solution contains Barium ion and silver ion What could be the anion B ClO2 ClO2 ClO2 ClO2 Yes I will show picture number 16 Very good Everyone has voted for this Let us see what is the answer Oh my god 9 students only Ok As per the last question This is B Ok we will see Wait Answer of last question is B How it is B we will see One minute This is the last question The solution contains barium ion and silver ion Barium is B A plus 2 Silver is A G One minute Preventive answer is yes Silver ion is A G plus I have written the word solution My dear students Solution Not precipitate Solution means In which among them You are both of them are soluble In which among them You are both are soluble you need to think Ok ClO2 No no AGCL is white precipitate White PPT Ok now nitrate Barium nitrate and both are the nitrates Why I add this question Earlier I gave time 60 seconds for this question But I thought ok let's increase the time Because I found this question good Barium nitrate and AGNO3 Both are soluble Nitrates are soluble Generally nitrates are soluble Sulphates Barium sulphate is White PPT And last one is definitely not our answer Understood Any doubt No Ok fine I am showing you question number 15 Though we did not discuss Though it is not consider Ok please don't mark any answer In your This thing Don't mark any answer I am showing you the question number 15 If it shows I will show it to you Ok I will see whether it shows or not Ok it will not show I am showing you question number 15 I have skipped for everybody Please tell me answer of this Please tell me answer of this Question number 15 It's not consider in the But tell me answer No it's not going to clear the result Don't worry It is not going to clear the result See if I won't See all these answers are already same Don't worry This is the question This is the last question students do it fast It is not there in the No need to mark but tell me the answer What is the answer for this question Ok C, D It is also very good question You need to think By mistake I skipped it But it is very good question B, D, C oh my god Mix answers I am getting mixed answers for this C, C, C, C All our things Ok fine Should I tell you Should I tell you what is the answer 15 Ok Answer for 15 is C Equa sodium hydroxide Is added white precipitate From soluble in excess Soluble in excess means Amphoteric oxide There are only Amphoteric oxides are like zinc maybe there Aluminium or maybe lead Zinc and aluminium both are given Ok this is not going to decide Equa sodium hydroxide soluble in excess Yeah Samonia is soluble Aluminium salts are not soluble in ammonia Answer must be from these two Answer must be from these two Dilute hydrochloric acid bubbles of gas Now definitely bubbles of gas Are there means Carbonate is there So answer must be C Did you understand students Did you understand Or should I tell again Should I explain again Yes Zinc precipitate is white Can you repeat the 17th one again 17th is this my dear 17th I will show you 17th question is Ok first I will show the result Please wait Meghana please wait I will show the result to all of you Those who want to leave they can leave I will explain you the question Ok fine so result is Lux NPS K Ok congratulations Lux Ok students you can leave those who want to leave Meghana I am going to explain you the question Meghana sorry Congratulations Lux Ok this is the question Meghana They have asked What could be the anion the solution Contain they have used the word solution Solution means not precipitate Solution is a soluble thing Solution means soluble Nothing is soluble Chloride only no So you have two ions BA plus 2 AG plus Chlorides of AG plus are not soluble Because AG shear form that is a precipitate Chlorides of AG are not soluble But they have asked for soluble thing Chloride is not the answer Nitrate Nitrate of both of these anions are soluble Both of these cations are soluble Sulphate Barium sulphate is not soluble Barium sulphate is not soluble Chloride and nitrate This is also not Did you understand Thank you Ananya Ok good So give it up We will meet next week Bye students. Thank you