 Okay fine first question is in front of you and that was solution of copper to sulphate Was made by adding excess copper to oxide to dilute sulfuric acid The mixture was heated still and then filtered Dilute sulfuric acid you have copper oxide you have when it filtered you can see the copper sulphate solution form Question is what was the pH of the acid before adding the copper to oxide and the solution after filtration? Question is very easy. You have to tell the pH before adding and after adding so don't think that question will be very straight forward Okay, tell me the pH of acetic acid tell me the pH of tertiary acid whether it's a less than 7 more than 7 It is not like that you will have Christians like this where you are mixing two things And then you think you have to think about the pH value. So Christians will be a little different in this Should have mentioned it with an acid Should not have mentioned What? It's an acid. Yes, you are right, but fine. No problem. You see what is the pH before adding copper oxide pH before adding this What is the answer? Okay, fine Everyone has voted good. I hope that this time I'm going to get oh Only 25 more than 50% students have marked it wrong my dear students when you put the copper oxide Plus H2SO4 Double displacement reaction Copper sulphate will form CUSO4, CUSO4 is a neutral salt That's why pH will be 7 after the reaction and since the previous you have the H2SO4 That H2SO4 is acetic So pH was less than 7 if anyone has any doubt, please ask then I'll go to Christian and explain No, no, no see copper sulphates can you show the question once? Okay fine Okay, see This was the question So the thing which is you are getting is the copper sulphate after the reaction after the reaction you are getting copper sulphate Okay, so We generally don't say that copper sulphate is acetic. We say it's a neutral only copper to sulphate You know what you're getting with the pH of the acid before adding copper to oxide and solution after filtration This filtrate is nothing but copper sulphate But it's added in excess since copper oxide is basic salt, right? Yes, copper oxide is basic, no doubt Copper oxide is basic Yes, it is excess Okay, you are saying that as per solution you are saying that dilute sulphuric acid is in excess So you thought that it is less than 7, yes? No, no see you have to think like that Everything got dissolved Now what happens you have a copper sulphate only Okay, what happens CuO plus H2SO4 gives you CuSO4 plus water It is nothing but a kind of a neutralization reaction and this is the salt produced Okay, yes, you can say that there are chances but still it is a neutral salt Copper sulphate which you are going to get is a neutral one Okay, but now I get it but sir isn't as per solution as if the salt form should be acidic Okay, see copper to sulphate generally we say it is nothing but what I want to tell you Copper plus 2 is there and sulphate 2 minus is there If you go like that there is no hydrolysis of copper 2 plus Okay, so relatively they are the same only Your concept is right that copper sulphate is but you can also say that copper hydroxide is not that weak Copper hydroxide is weak only I am not saying like it is strong base But it is comparatively it is also a good base Okay and with the sulphate it forms a neutral salt So pH of solution after filtration you have a copper sulphate So copper sulphate is neutral in nature Okay, now you can also think like that So H2SO4 is there and you filtered it and you have mixed the whole thing So whatever you have is nothing but a copper sulphate Okay, I think one minute I am not hearing any voice Just a minute maybe one minute one minute students I am not here I am not able to hear any of your view Just now you can speak Okay, if anyone has any doubt please ask Earlier I was not able to hear your voice Okay, so this is the answer Answer is C understood less than 7 then copper sulphate equals to 7 Any doubts students? Okay, we will have more this type of question don't worry So now we are moving to the leader mode Okay, Omesh is the fastest Omesh You have not written your school name So I don't know whether you are my student or from which school you are You should write The second question an alloy contains copper and zinc Okay, read the question carefully it is also 1 hour 30 seconds Read the question carefully don't think that there is no numerical means You can answer it very easily An alloy contains copper and zinc some of the zinc have become oxidized to zinc oxide What is the result of adding excess of dilute sulphuric acid to the alloy You have to think Please use your mic An alloy contains copper and zinc you know that copper and zinc alloy And some zinc is oxidized in Z and O H Okay, 22 students have answered it right Let's see this question again how to answer this So if you see the question number 2 Okay, so then I am moving to the next question Next question So question number 2 is Some alloy contains copper and zinc very good question An alloy contains copper and zinc So you have a copper and zinc In the oxide form some of the zinc has become oxidized to Z and O The result in adding excess of dilute sulphuric acid to the alloy Now what you do you put the H2SO4 dilute sulphuric acid Okay, in dilute sulphuric acid when you add and zinc oxide So what happens in the previous question also someone asked It should be acidic there you know when you take a dilute sulphuric acid And for the preparation it is a very less acidic Okay, that one student asked that is very good question Sir copper sulphate has formed a strong acid and weak base Yes generally it should be whenever salt is from the strong acid weak base It should be the acidic in nature So now some of the zinc has become oxidized to Z and O What is the result of adding an excess dilute acid to the alloy Excess when you add that is very very important question You know Z and SO4 will form Z and SO4 And copper will remain as it is you know one fact that Copper won't react with sulphuric acid So copper won't react with acid why Because copper is Because copper is tell me who can answer Why copper does not react with sulphuric acid Because copper is no not less electronegative Copper comes below hydrogen in electrochemical series Do you remember I told you please stop calling me a careless zombie Do you remember on first day I told you one trick Yes stop calling me a careless zombie Instead instead is iron How? Creator mercy mercy is the mercury Now this how is H H copper is below hydrogen it won't displace So no reaction copper will remain as it is So pink brown solid remains But your zinc oxide will get dissolved And the solution colour less solution Generally Zn plus 2 salts are colour less Salt are colour less always remember colour less Understood students that's why answer is B If anyone has any doubt please ask No doubts please write ND Please write ND if no you don't have any doubt Okay moving to the next question These are very very good questions So take your time and then answer Okay moving to the next question That is first we will see the leaderboard And leaderboard says that Anike Bhukta INR 10 Oh Alisha check Alisha have is leading now Fine moving to the next question Please read the question please see the timing Okay timing is very important in today's quiz Which is not a typical property of acid Definitely you will not have a 1 hour 30 seconds A 1 minute 30 seconds you will have only 55 seconds now Which is not a typical property of an acid Okay 29 seconds left Okay which is not a typical property of an acid Yes students pass Why Anike You must have not heard the question properly Okay let's see how many of you are getting full marks in this I hope that this time Only 18 students Students what you are doing You will make mistake like this So next question is Okay see The next question is This is the third one Okay we see third question how to do Which is not a typical property of acid Alkal is producing water no doubt Pardon They react with alkali this is right They react with all metals producing hydrogen Few minutes back I told you It does not react with copper It does not react with gold It does not react with silver It does not react with platinum They react with carbonate producing carbon dioxide Very very important point So acid let's say H2SO4 Reacts with copper carbonate Let's say COCO3 When they react there is a double displacement reaction How to write double displacement H plus SO4 2 minus Copper plus 2 CO3 2 minus Double displacement means H will go with CO3 Copper will go with sulphate You will get COSO4 Plus H2O plus CO2 In last class also I told you Whenever H2CO3 breaks into H2O and CO2 You will definitely get gas This is also correct They turn litmus paper red This is also correct So answer is B Why you people made mistake in this Yes H2CO3 is unstable Yes that's why I have written here H2O and CO2 Aditya Do you have any doubt Aditya That's why it gives you carbon dioxide gas Yes sir same thing Ok means do you have any doubt Anyone No doubts very good You can ask me anytime whenever you have doubt Because next question may be related to this concept Ok first we will see the leader board And now who is leading Who is Booty Matt Boat please Who is this please write your name Ok Avipsha is leading very good Avipsha Fine moving to the next question Please read the question see the time And see the options properly Very good question is in front of you The oxide of element X was added to an acid It react to form a salt and water Which is the pH of the acid What is the pH of the acid before the reaction And what type of element is X Ok So what is the type of element X So you are adding some oxide from top That is element X And you have acid inside that You have acid also When you put acid in that You are getting something Thank you Surya So tell me what is the answer for this question Why Aditya every time you say oh no oh no Ok I hope this time I will get a good graph Ok this time is good 42 students have marked it right Very good students That is a definitely because salt is forming Must be metallic oxide Because one side you have acid Acid is only forming salt with base Base must be metallic oxide Metallic oxides are always basic in nature Metallic oxides are basic So you will get the salt And the second option was what was the pH Is less than 7 Any doubt Any doubt Oh you are in this one of the 7 Oh my god No doubts Very good Moving to the Ok first we will see the leader board Ok I think Purva is leading now No no Still Avipsha Very good Avipsha Ok next question Please read the question carefully An extra solution of organic compound Methyl amine Methyl amine has pH greater than 7 Ok which statement about methyl amine is correct It neutralizes an aqueous solution of sodium hydroxide It reacts with copper carbonate To give carbon dioxide It reacts with hydrochloric acid to form salt It turns blue litmus red Very easy question this time I hope this time all of you are going to get Ok fine it time's up Ok 38 students have marked it right Very good student The C option was the only correct option Ok tell me if anyone has any doubt Please ask The C option was just acid based reaction It neutralizes with acid It neutralizes with acid So why you people have made the mistake Please let me know if you have any good doubt If someone has thought of some exception And you can tell me that exception Maybe the answer of 38 students are wrong In that case What you have to tell me Sir what is the formula of compound What is the formula of compound What they have given Ok let me see the question The compound they gave is just amine Compound with methyl amine Ok you know what is the amine Amine is this Amine is any compound which has an NH2 group NH2 group Ok this is known as amine Alkyl amine What you call it as Alkyl amine Alkyl amine So they said the methyl amine Methyl means R is nothing but CS3 One carbone So compound name is So compound is CS3 NH2 This is the methyl amine Any other doubt please ask Any doubt Moomita Ok fine So you know amines are base Ok one thing I want to ask you Since your friend has asked one good question What is the formula If I ask you who can answer Which type of base is this Which type of base Which type of base Tell me Who can answer No no weak is fine There are three types of acid and bases Which type of base is this Ok I will tell you There are three types of bases What is that Arrhenius Grace Bronsted and Lourie base And And Lewis base Bronsted and Lourie, Lewis and Arrhenius Which base is this Who can answer Ok it is a mixed answer So I am getting Ok so I will write here Bronsted I will write here Arrhenius I will write here I will write here Lewis You know the answer of this question is What is the answer of this Arrhenius base are those bases Which gives OH- Which gives OH- Can it give OH- Can it give OH- It is not having O at all It is not having O So it is not Arrhenius base Can it be a Bronsted base Bronsted means proton From Bronsted base means proton acceptor Can it accept proton Yes it can accept proton How NH3 If I write like this CS3-NS3 Plus proton Will give you ammonium CS3-NH4 Plus It is a proton acceptor It is a Bronsted and Lourie Can it be a Lewis base also It is also a Lewis base Because Lewis base is something that is Lone pair donor Something which has a lone pair That is a Lewis base Is it having lone pair Is it having lone pair nitrogen Yes nitrogen is having lone pair If you draw the nitrogen amine structure It is like this And one lone pair is there Because there are 8 electrons Must be there in nitrogen One I will write here like this I will write like this One Two Three Four Five Six Seven Eight These 8 electrons are there So it has a lone pair So it is both type of base Please remember this Very important point And it out No Okay good So moving to the next one First we will see the leader board Okay let's see who is leading Abhidshah Prishim Surya Very good students Surya was the fastest very good Okay fine moving to the next question Be ready for that Some reaction of substance R As shown in the diagram Substance R reacts with magnesium Sodium carbonate Copper oxide One give hydrogen One give carbon dioxide One give copper to sulphate Respectively What type of substance R is What type of substance R is You have to think Thank you students Okay tell me Easy yes very easy I think most of you have answered Those who have not answered please answer it fast Hydrogen gas is released With magnesium Carbonate gives CO2 Oxide gives sulphate What type of substance R is Okay still few of you have not answered Please answer it fast Thank you Arithya Okay fine So I think all of you got the answer Yes Let's see this time I am expecting a long Bar on a correct answer Okay let's see Answer is A very good students Answer is A because that was acid Two questions we have already discussed Like this whenever there is acid With the copper oxide it forms Sulfate ion Acid gives hydrogen gas with metal Understood any doubt in this Acid gives hydrogen gas with metal And what was the second option I forgot what was that What was that second option Acid with Acid with base Yes okay that will give CO2 Whenever there is a carbonate with acid It gives CO2 few minutes back we discussed Very good students But still I didn't get 100% result Okay now who is leading now Oh Surya was still the fastest one Good Surya But say now what is there on your plate So next is substance K react With sodium carbonate Substance K reacts with sodium carbonate With sodium carbon to form a gas The gas turns lime water milky What is the substance K which Poses take place in the reaction And which process takes place in the reaction 33 have already answered Which type of reaction Okay they have not confused too much They have given you options like combustion And neutralization Yes so combustion is something Where you get some gas You all know that which gas is Relaged in the combustion And that causes the greenhouse effect also That causes greenhouse effect So neutralization you all know Okay fine so answer of this question is Okay those who have not answered please answer it fast Next few questions will be based on the Salt I am again telling next few questions Will be based on the salts so you need to Think too much in those questions Okay so answer for this question is Again mixed answer why students why 27 students have marked it wrong 32 right Why the question was very easy The question they have asked is Combustion reaction is giving CO2 that's correct But neutralization was that process HCl is reacting with HCl is reacting With any carbonate give you CO2 gas And that CO2 gases giving lime water milky And that reaction is nothing but a neutralization reaction Any doubt 27 students did you understood this Okay fine I will show it It was I think 7th question right Yes so this was the question They have given you sodium carbonate Na2CO3 hydrochloric acid HCl Gives you they have given lime water milky That is definitely CO2 gas Which reaction is taking place you know Okay very good question you can ask here What is the nature of ethanol What is the nature of ethanol Is it acidic or basic What is the nature of ethanol Is it acidic or basic Okay alkali alkali 2 have written alkali 2 have written alkali Anyone else is it acidic basic or neutral You know no one is answering now Because not an acid not base it's a neutral Very good Arian it is not acidic It is ethanol is this CS3OH It is having hydrogen but it is not acidic When you put the pH paper When you put the litmus paper there is no change in colour in case of ethanol It is a neutral only Or we say very less acidic Means less acidic than water also Water is slightly acidic Water is slightly acidic Acidic ethanol is even less acidic than water Understood So answer it was not acidic That is why you people have made the mistake Hydrochloric acid will give you H2O plus CO2 plus NaCl Thank you for asking this question Otherwise I would have not explained you this part So those who have small doubt also please ask it Don't keep your doubts with you Otherwise I would have skipped this part Ethanol I would have not told you ethanol is neutral in nature Okay fine can I move to next question Could I move to next question tell me Okay fine So moving to the next one That says Okay but before that Look at the leaderboards Leaderboard says Okay question is Next to a witcher Good Fine no problem Just Keep it up Next question is Please read the question carefully And see the time Okay The result of test of solid X are shown When there is a sodium hydroxide Green precipitate form When there is a acidified silver nitrate Yellow precipitate form What is the X? It is a simple question based on the salt The result of the two tests of X are given Okay 30 students have answered But you know 30 seconds are left with you now It was just 60 seconds So The sodium hydroxide added Green precipitate Silver you know this Thank you Surya This question was This question you can think We discussed it in Chemical equation chapter also Somewhere I told you Okay Fine So now we are going to see Oh that's a cool So this time I got Fortin correct answers only Okay this is a good graph Okay now see how to do this question So Question is Just a minute Question is something I think 8 questions we have to discuss Okay Question is very easy The result of two tests X shown Aqueous sodium hydroxide Added to Added Added green precipitate form I want to tell you all of you You know green precipitates are Generally for Fp2 plus Fp2 plus salts give green color Generally Fp2 plus salts are green in color Okay Generally Okay fine so green color Now see if you have Fp2 plus somewhere And if hydroxide reacts You will get to hydroxide will react You will get FpoH whole twice So this is the reaction most likely to form And this is the green precipitate Generally hydroxides of all the metals Other than group 1 Last class also I told you Halina ki raksa faryar Other than those hydroxides All hydroxides are precipitate They generally form precipitate Okay so it is a green precipitate Ppt So this is Fp2 plus Acidified silver nitrate You know acidified silver nitrate is AgNO3 And it is acidified means in presence of H plus But giving yellow precipitate With which salt With which salt You know now there is a very very important part Silver is going to form salt And we discussed In class In the chemical equation chapter with iodide AgI This is yellow in color AgI is yellow in color Okay all those things we discussed Do you remember this? This was the question I explained If I remember it properly I explained that in When we discussed photochemical That Photochemical reactions Or we discussed of black and white photography Do you remember? Black and white photography There I discussed this Pbi2 and all those things So AgI is formed Now see which is the best possible option D is the best possible option Iron is Fp2 plus iodide Here it is a chloride no it will not form yellow Copper 2 Copper 2 hydroxide is also not green in color Iodide is right But copper 2 hydroxide is not green in color Copper 2 plus hydroxide is not green in color Chloride is definitely wrong So answer is B Silver chloride is white in color White in color Any other doubt students? No doubt Could we move to next question? Yes So there are 15 questions don't worry We will able to finish that So first we will see the Leaderboard Okay now this I think is a game changer question Let's see how many of you Have lost their positions And how many of you have improved also? Oh good Surya is reading very good Surya Okay now be ready for the next question Same type of question But this time it's a little different Solution containing substance X was tested Test is given result is given Test is when we do the flame test You know flame test when you put the metal salt When you put the metal salt and you just Put in the flame and you see the color of a flame That color of a flame is lilac color Okay fine Acidified silver nitrate solution yellow precipitate Okay Now you have to think Only 20 seconds 24 seconds left So be ready for that 20 seconds Fine Oh my God 24 students have done this right but more than that People have done this question wrong Students that was not very difficult question It was again a easy kind of question for you Just you need to understand that flame test Why I gave this question To tell you the flame test There are few flame tests you need to remember Okay there are few metals You say sodium Sodium gives golden yellow Golden yellow color Salt of sodium give golden yellow color in flame Potassium gives lilac color Potassium give lilac Calcium give brick red Red color in flame Strontium is crimson red Crimson red Okay this all you will learn later also Barium is a very beautiful color that is Apple green It looks very nice when you see the medium Salt put in the flame Apple green Okay copper salts are generally blueish Generally blueish Or greenish also sometimes we say That's it these are all important Copper is also not that important But these are very very important So lilac color means potassium And yellow ppd 2 minutes like we discussed iod So that answer is nothing but potassium iod If anyone has any doubt please ask Any doubt Okay lithium does not show color my dear Lithium does not show color in flame test Any other doubt All the iodite salts are yellow No no no no please don't make this thing All iodites are not yellow AGI is yellow that's it Can you show the question Okay do you want me to show the question again All it's not all Okay fine See this they have given the yellow precipitate Understood they have given the yellow precipitate So you are saying that how can we get to know that Potassium iodite and potassium bromide Okay silver bromide is actually You can say like that But see potassium iodite and bromide It is actually a little pale yellow in color Pale yellow we say Okay so that is also a nice question That how can we judge that It is how is it a yellow color Or which yellow color it is forming But you know AGBR is a little pale yellow color So you can also say that AGBR in that case Okay but since the color is pale yellow I would go with the better option is This one AGI Understood students Actually it's a dark yellow yellow precipitate We say the AGI Okay and both are yellow only So you could I know that many of you have answered That AGI also Okay how many of you have answered AGBR sorry How many of you have answered AGBR The chrome yellow Actually it's a yellow but you know the shades of yellow All this thing is differing in the shades of yellow That's the point Understood So but your answer is not I can't say it's a wrong or completely wrong But whenever you say that Aiodide are completely yellow Otherwise we say the pale yellow in that case of AGBR Understood Anish Anish did you understand Okay moving to the next question Okay Surya is still reading And he was the fastest Okay moving to the next question The white solid is insoluble in water When it is added to hydrochloric acid bubbles Of the gas are formed Adding aqueous ammonia to the solution form Gives a white precipitate Adding aqueous Excess aqueous ammonia cause the precipitate to re-dissolve Now think about this You have to think about this question That's why I kept time as 1 minute 30 seconds You have to think you have to write Then only you can able to answer You know this is one of the favorite questions Of like competitive exam In competitive exam these types of questions Are asked in organic chemistry Okay fine Okay Surya okay I think I might have answered Good Thank you Surya Okay so the true yellow Okay fine I think this time Most of you are going to give Here Wrong answer only Let's see Some of you people It is only 12 Only 12 students fine We'll see how to do this question Don't worry don't worry I'm here So we'll see how to do this question So question is very easy you know You have to think You have to think what is happening What is happening So it's not always whenever you see the Big question then only you will That are only tough These are also This question is considered in tough questions only White solid is insoluble in water White solid okay fine Let's find one information we got Acid HCl bubbles given Okay it is most likely to be carbonate Most likely to be carbonate I'm not sure I can just say it's most likely to be carbonate Adding aqueous ammonia Aqueous ammonia is nothing but NH4 wedge Adding aqueous ammonia to the solution form Give a white precipitate Oh my God NH4 OH gives white precipitate Means okay we will see Adding excess ammonia causes precipitate to Redissolve Now this gives a very important hint Excess ammonia can be dissolved If it is a copper salt Copper can dissolve in excess ammonia If it is a zinc salt It can also be dissolved in aqueous ammonia Copper, zinc can be dissolved in excess ammonia Aluminum won't Aluminum salt won't dissolve in excess ammonia Calcium salt won't dissolve in excess ammonia Ammonium salt won't dissolve in excess ammonia So three options are gone Ammonium gone, calcium gone, aluminum gone Answer is this By just the last statement Copper and zinc salts are dissolved in excess ammonia Due to complex formation Complex are one type of salt you will learn in class 12 Due to complex formation Complex formation Copper and zinc salts Even PB also Copper, zinc, PB salts are Solubil in aqueous ammonia Okay salts Or you can write Redissolve Okay just a minute students I will write here PB hydroxides Copper, zinc and PB hydroxides Redissolve Redissolve That is a very very important point Okay So answer is zinc carbonate And zinc salt I few minutes back I told you Zinc salts are white in nature So zinc carbonate are white It is white I few minutes back I told you Here that's why they have given white Gas given carbonate Students did you understand this question it is very very important Did you understood this All of you Yes Any doubt Calcium carbonate white Calcium salts are generally white Reaction with NH4 OH You want to know the reaction You want to see the reaction But it is not required for you You want to see NH4 OH how it reacts It reacts to form Zn OH Whole 4 Complex will form 2 plus Okay ammonia complex sorry So Okay one minute Redissolve and excess of ammonia causes Excess of ammonia they have written So here not NH it will be NH3 Okay so NH3 will react And here you will get plus 4 charge Some type of complex will form That is a complex you don't need that Understood If anyone has any doubt please ask No doubts Zn ammonia form the complex That is Zn NH4 2 plus Not 4 plus it is 2 plus only It is 2 plus This type of complex is formed I will rewrite it Zn NH3 4 2 plus This is the answer Understood Someone ask from girl ask Okay fine Okay now we will see the review Okay this time we will see who is leading Okay Seems like Alisha Very good Alisha Okay next question Which of the 4 Which 2 compounds give a white precipitate When their actual solution are mixed Now please students I want 100% marks in this 100% result Can you show it please don't Mark the wrong answer Which 2 compounds will give white precipitate When their actual solution are mixed Silver nitrate, sodium chloride Silver nitrate, sodium iodide Sodium hydroxide Copper sulphate, sodium hydroxide Iron 2 chloride Yeah So fine Please answer it pass We have 4 more questions Okay fine Last 20 seconds This time I think I am expecting 70% no 80% result Let's see how much it is Everyone has voted very good students So now the answer of this question is A Oh my god Why students more than 50% I have not got 50% only Why Because Question was very easy Answer is A only So many times we have discussed this type of question Silver nitrate Silver chloride Okay you know this is a very Good question also To understand all type of neutralization reaction What I can write AgnO3 Plus NaCl Double displacement will happen Ag will go with Cl Na will go with NaNO3 Na will go with NaO3 We will get NaNO3 plus AgCl AgCl is white in color Now I will not write each and every reaction I just write the product Here silver nitrate It is Ag plus Na3 minus And sodium iodide Na plus I minus So product is AgI AgI is yellow in color So this is not the answer O is minus Copper plus 2 So product is Copper hydroxide My dear student What is the color of Copper hydroxide You tell me I am not going to tell you What is the Copper hydroxide It is blueish color Very good it is blue in color Okay so Why will reaction occur Because you can see it is Double displacement reaction This is known as precipitation reaction Precipitation reactions Are always favorable Okay if you remember I told you The lurge shatter layer principle If anyone remembers Do you remember lurge shatter layer principle How many of you remember lurge shatter layer principle Okay fine forget about that Always remember the precipitation reactions Are always Pavorable Always favorable whenever precipitate forms So NaOH is here CuSO4 is here So the precipitate form Is CuOH whole twice This is the precipitate That is why this reaction goes in forward direction And you will get the You will get Na To SO4 Lurge shatter layer principle So could you briefly tell a quick solution That are white Generally zinc salts are white Calcium salts are white Calcium salts, zinc salts Aluminium salts are white Aluminium salts are white And What else So Generally pd salts are also white Pd plus 2 salts are white Okay all group 1 atom salts are white All group 1 atom Sodium Halina Kiraksepariya Sodium Potassium Pseum Generally these salts are white NaCl Generally these salts are white Even group 2 salts are also white Magnesium chloride white Group 1 group 2 These salts are white in color Okay and all those in the group 2 as well These salts are generally white Did you understand this Can I move to next question Thank you students Next question is this First we will see the leader who Today I think Who is meeting You know at the end of the Listing only I think Surya is still leading Okay No Prism Fine moving to the next question Okay please read the question carefully Okay The tests are carried out to identify the Aqueous solution of X Aqueous sodium hydroxide is added And blue precipitate is produced Dilute nitric acid is added Followed by Aqueous silver nitrate and white precipitate Is produced Please write the answer Please don't make mistake my dear students Please don't make mistake How many of you have answered How many of you have answered Easy top or what Easy Hot top or medium 11th question again definitely I will show Meghana Meghana could I show it at the end of the After 15th question Could you wait for Fine Please wait for 2 minutes After finishing this Because we don't have much time now Okay Okay so 55 have answered Please answer it fast Your question is very easy One is giving you the blue precipitate With sodium hydroxide And one is giving you the Okay everyone has voted And answer is Okay B is the answer So answer is copper salts are blue in color White was the silver C L so answer was the salt Which having a chloride ion Any doubt in this question Any doubt in this Do you want me to show the question No doubts good Show the question Ananya is saying Ananya is very easy one I will show it in 1 minute So see the question is Okay Like which is the dilute salt So I told you when you are white precipitate That is C L so chloride is there Because A G C L will form that is the white color precipitate So that is A G C L will form A G C L Okay that is white precipitate And blue color precipitate means Copper plus 2 salts are there So answer will be copper chloride Answer is B Ananya did you get this Ananya Okay moving to the next question So answer says that this time Surya is again I think we will Read faster Very good Surya moving to the next one We have Which gas Realize a glowing splint You have 17 more seconds Which gas realize the glowing splint Which gas realize 10 more seconds Fast fast fast Answer is nothing but oxygen Oxygen is the answer Very good Next question Okay Which Which statement about aqueous sodium hydroxide is correct We read it And answer it fast Which statement about Aqueous sodium hydroxide is correct Which statement about aqueous sodium hydroxide is correct And it is added to a solution containing ion or white precipitate is formed When it is added to a solution of copper 2 plus ion Okay fine Let's see what is the answer Okay 20 more seconds students you have Please do it fast Okay 23 of you have answered it wrong Answer it correctly So fission was very easy They have asked you what is the NaOH property Which of the following is having the NaOH property So if you read the question Just a minute students Solution sodium hydroxide which is the Added to a solution Sulfate ion white precipitate When it is added to a sulphate ion It gives white precipitate No no it is not necessary Which is added to the Copper 2 plus ion When it is added to a copper plus 2 ion So blue precipitate is formed Which dissolves in aqueous blue solution Yes this is But still it is not correct It dissolves in ammonia I told you copper 2 plus get dissolved In ammonia but not in aqueous NaOH Not in aqueous NaOH No but this is the correct answer When added to this Green precipitate FU which whole twice will form Green colour precipitate Which does not dissolve in excess Yes it does not dissolve this answer is correct Which all dissolve in excess NaOH If you remember I told you PBZN and AL This dissolved in excess In excess NaOH also And the last one it is added to Ammonium chloride gas is produced No answer is C If anyone has any doubt please ask Then we are going to move to the last question Yes it is infallible All hydroxides Of D block elements Are insoluble Except very few hydroxides Group 1 Other than group 1 hydroxide and NH4 Plus All are insoluble Or expiringly soluble Understood Neha That is Expiringly or weak both are fine insoluble Sometimes we say expiringly soluble also Last question Just see the last question Very easy question Ammonium Aqueous sodium hydroxide Is Added to solid X and mixture is The green precipitate form And alkaline gas is given off Which of the following is present in X Please answer it fast You have to tell that which is gas is Given Which ion is present in the X Green precipitate is forming And alkaline gas is given off Green precipitate And alkaline gas Okay 56 have answered Please answer it fast Okay fine So answer of this question is ammonia gas And Green color is Fe plus 2 So many times I told you Green color is because of Fe 2 plus Salt Fe 3 plus salts are generally reddish brown Fe 3 plus reddish brown Fe 2 plus green color And second thing is Basic gas that is nothing but ammonia Ammonia gas is basic in nature You know ammonia is a base Let's see what is the leader board Those who have doubt please ask Those who have doubt please ask I will show the description And then I have to show the description Okay Very good Surya Very good Okay good So those who want to leave please leave If those who want to see the question of the 15th Please see Then we will discuss the other one also Congrate Surya very good Those who want to leave they can leave now And I am showing the question of the 15th If anyone has doubt please wait Please wait for the question of the 15th If you have doubt in that Okay So the question is One minute yes Sodium hydroxide in solid X You know when you have the solid ammonia See they have given the Okay students one minute I am sharing it again Please give me a minute Please give me one minute Okay Okay fine So answer for this question Okay please stay Okay okay okay please Don't Okay students And it's 4 plus and Fe2 plus Because Fe2 plus are green in colour So if you Acvosodium hydroxide Added in the solid X and heated So any over which you have And let's say Your X is having this Green precipitate is forming So this must be Fe plus 2 Because it is going to form Fe over which whole twice This is green Then Alkaline gas is given off Definitely that will be having Anion, cation and H4 plus Because alkali gas is Nothing but ammonia So whenever You remember one thing I told you In last class Ammonium salts With alkali Always gave on heating Always give you Ammonia gas This I told in last class Is there any other basic gas No no Ammonium salts Whenever you add alkali Okay whenever you add alkali That will give you the See this whenever you have the alkali And ammonium salt That will give you ammonia There is no other option Which minus is not fitting at the best Best option is H4 plus only Understood you have to see options also Is there any other basic gas No, ammonia is the gas That is basic in nature Okay Then Okay no other gas No other gas Understood Show which question Tell me which question you want to see Someone ask one question 11's number 11 Those who want to leave please leave If you have Done with all the questions you can leave Thank you sir Thank you students We have not done So thank you students We will meet on next week With the next quiz Thank you bye