👉 NEET 2026 SHOCK 🔴 | Out of Syllabus + 2 Questions with 2 Answers (WITH PROOF) 🚨🔴

本站添加: 2026-05-10

[00:00:04]Hello all my dear students. Right now I'm here with three questions and these three questions are from chemistry.

[00:00:14]Before I start this video, let me tell you first of all who is your Baba HSS. I will take just three or four seconds.

[00:00:22]I have done my M.Tech in 2004. MSc gold medalist 1999 JRF gate 10 M.Tech and I have been teaching for the last 27 years and these are the toppers.

[00:00:36]AIR 1 Tanishka Yadav Mehak Arora aims third rank all India Chaitanya Mittal aims fourth rank and Shweta Arora Mehak Arora's brother AIR 5 with 715 marks. Now, let me start kids.

[00:00:56]This is the question.

[00:00:59]This is very very easy question.

[00:01:02]I will not say it's tough question.

[00:01:04]It's an easy question.

[00:01:08]And I would like to say it's very easy question, very easy question, very easy.

[00:01:14]They are asking about acetate.

[00:01:17]So answer simply is acetate. But I would like to say it's a bonus question and everyone should get full marks.

[00:01:26]Everyone. Whether you have attempted this question or not attempted this question. Whether you have gone for the right answer or you have gone for the wrong answer. My dear students, let me tell you why.

[00:01:39]You see, acetate, this we are studying from ninth standard. We know, but my dear students, see what's the problem.

[00:01:49]This is the syllabus provided by NTA.

[00:01:53]These are the acid radicals, carbonate, sulfide, sulfate, nitrate, nitrite, chloride, bromide, iodide and in anions they could have written acetate in the syllabus.

[00:02:08]But it's missing, you see. It's missing.

[00:02:11]It's not given in the syllabus.

[00:02:19]So, why you have given this question?

[00:02:23]It's a mistake.

[00:02:29]From the NTA side, so it's humble request to the NTA either to you could have written acetate over here.

[00:02:38]And if you have not given acetate, then why you have provided this syllabus?

[00:02:45]What is the meaning of the syllabus? So, first question should go bonus to each and everyone whether that student has marked it or not because it is totally out of syllabus, out of syllabus.

[00:03:02]Out of syllabus. First question.

[00:03:06]Now, let me come to the second question.

[00:03:09]The whole world is waiting for this question. Now, my students, see, this question is this one. You know, select the reagents that reduce nitrile to primary amines.

[00:03:24]Nitrile to primary amine, that means RCN is converting into R C and N and two hydrogens over here and two hydrogens over there. All right, my dear students. Total four hydrogens we have to add. Now, what's the problem?

[00:03:48]See, LiAlH4, everyone knows. LiAlH4 and water.

[00:03:54]Better they could have used dry ether.

[00:03:57]Because with LiAlH4, water, okay, they have used, no problem.

[00:04:04]I will come to the Sn/HCl, right? H2 nickel, everyone knows. And sodium amalgam, this is Mendius reduction, this also we know.

[00:04:13]Now, the whole masala is of tin and HCl.

[00:04:16]My dear students, definitely ACD ACD is the correct answer.

[00:04:21]Definitely, this is the correct answer.

[00:04:24]But, cyanide on reaction with the tin and HCl, definitely cyanide will react with tin to produce SnCl2 and nascent hydrogen, my dear students. They See what it is going to do.

[00:04:40]Tin lies above hydrogen in the electrochemical series, above hydrogen in the electrochemical series. Why I'm talking like this? If you know the electrochemical chemical series, the elements which are placed above hydrogen in the electrochemical series, let me show you first the electrochemical series. Those who don't know what is electrochemical series, this is given in your NCERT.

[00:05:04]You can see this is your electrochemical series.

[00:05:09]And NCERT writes that any element which is better better reducing agent than hydrogen.

[00:05:18]That means hydrogen's SRP and SOP is zero. Any element which is having its SOP value to be the positive, that can displace hydrogen from the acid. Now, you see where is your tin?

[00:05:36]See, my dear students, tin is lying over here.

[00:05:40]You see, your tin is placed at this place. Can you see? This is your tin.

[00:05:47]Tin and this you see the oxidation oxidation will be positive because they have written they have written what SRP value SN2 plus two electron gives tin SRP value of SN2 plus is negative that means SN2 SN2 plus the SOP value will be exactly plus plus.14.

[00:06:15]That means this element is having ability to produce nascent hydrogens when it reacts with any acid.

[00:06:27]Are you getting my point? Yeah. If I talk about the electrochemical series if you see the electrochemical series if I talk about the electrochemical series then it starts from lithium potassium calcium sodium magnesium aluminum like this that tin is very close to hydrogen.

[00:06:37]If I talk about the electrochemical series then it starts from lithium potassium calcium sodium magnesium aluminum like this that tin is very close to hydrogen.

[00:06:51]This tin is very close to hydrogen that means it's yield it will convert cyanide into primary amine but the yield is 60% definitely it will convert it will convert your cyanide RCN to RCH2 NH2 but this yield is 60% only but they haven't talked about the yield.

[00:07:20]First let me prove this then I will talk about rest of the things. Just see the proof.

[00:07:28]If I talk about see reagent activation tin plus twice of HCL gives SNCL2 plus two hydrogen. Is it visible to all of you? Is it visible? Tin plus HCL gives SNCL2 nascent hydrogen. Now RCN will react with this hydrogen and blah blah blah, it will come to RCH2NH2.

[00:07:50]So, overall reaction, overall net reaction is RCN for nascent hydrogen gives RCH2NH2. Now, I will give the proof from American journals of Chemical Society. American journals of Chemical Society, they have given like this, see.

[00:08:09]American journals of Chemical Society.

[00:08:14]Okay, just wait. Just wait. Just give me a second, kids.

[00:08:45]See, they have written that transition metals any transition metals they are using, so yield is very good. If transition metals you are using, the yield is very good.

[00:08:58]RCN, iron, copper, nickel, palladium, cobalt, ruthenium, they are giving RCH2NH2. So, my dear students, if you are using tin, the yield will be less.

[00:09:10]Because that is also metal.

[00:09:14]Are you getting my point? So, if they are giving this reaction, then tin will also give. Now, let me prove Let me give you one more proof.

[00:09:23]Just wait for a second.

[00:09:26]You see this reaction. This is also I have taken from American journals of the same Chemical Society, and what they are writing.

[00:09:35]RCN HX molybdenum cobalt magnesium aluminum aluminum is from P block. Why I'm giving this source? Because tin is from P block. This aluminum is also from P block. You can see and this is producing RCH2NH2 and you see RCN ruthenium rhodium iridium iron cobalt etc. etc. what they have used. Why they have used? Because tin gives only 60% yield.

[00:10:06]Right? So, what was the question? The question was saying and see one more thing. When HCL reacts, this I have taken from the P block P block elements. Why they have given P block when P block reactions they are not in syllabus?

[00:10:25]Why they have gone into that into that much of depth? Why they are giving such type of question? That is one more question mark. But this I have taken from the P block 199 page in my NCERT.

[00:10:36]When HCL reacts with finely powdered iron it forms ferrous chloride and not ferric chloride. So, Fe plus HCL gives FeCl2 and H2 and Fe was in the electrochemical series nearest to the tin. Let me show you once again the electrochemical series.

[00:10:54]Where is Fe? This is your Fe. This is your Fe. See kids, this is your Fe iron and this is tin and this is nickel.

[00:11:03]Once you are using Raney nickel nickel aluminum powder or catalytic hydrogenation of alkenes or alkynes then also you are using nickel palladium platinum because they are giving good yield.

[00:11:16]So, why not tin? It's simple simple very simple question. So, examiner should have given this to be the answer also.

[00:11:26]This is also the correct answer that tin HCL because they haven't used water in the NCERT Stephen's reduction is given that RCN plus SNCl2 gives a mine and then on a hydrolysis giving aldehyde, but here hydrolysis word is not used.

[00:11:48]Once no water is used from where the oxygen will come? Examined and he has thought over definitely that it is given an NCERT and this will give aldehyde, but there hydrolysis is also taking place, but you haven't used water in this case. You have used water there. If this water would have used over here.

[00:12:17]It happens.

[00:12:20]While framing out questions, we are not giving that much of importance or we are simply thinking what is going in our brain that is like that, but this is clear cut answer. So, ABC is also declared to be the correct answer because ABCD the actually options should have been given like A, B, C and D, but they haven't given such type of answers.

[00:12:45]So, this is also the correct answer because you haven't asked about the percentage of yield.

[00:12:52]If they have written written the reagents that reduce nitrite to primary amine in a good yield.

[00:12:59]If they have used this word in good yield, then definitely good yield means good percentage, then this will be more appropriate or this is this must be declared as the correct answer because this is going to give good yield, but here both are the correct answer, but NTA I don't know. It's a humble request to NTA because NTA will say this is only the correct answer.

[00:13:25]So, two questions you got. Now, third question to you know very well this question.

[00:13:32]This question to you know very well.

[00:13:35]Both are the correct answer. Now here also examiner has shown the smartness but do while showing that smartness that examiner has forgotten one point. You have taken this question directly from the NCERT.

[00:13:49]NCERT but in NCERT what is written? It neither reduces tollens nor fehling's reagent.

[00:13:58]I got a question you could have taken so you could have mentioned that it neither reduces tollens or fehling's reagent.

[00:14:09]If you would have used it neither reduces tollens or fehling's so benzaldehyde reduces tollens reagent to benzaldehyde second option cut ho jata benzaldehyde benzaldehyde reacts with the tollens reagent. So in the NCERT for making that safety see the smartness of NCERT. I would like to see NCERT is 100% correct. Some people are saying they have taken this question from the NCERT.

[00:14:38]NCERT may likha it neither reduces tollens or fehling's reagent.

[00:14:44]Tollens reagent reacts with both aliphatic as well as aromatic aldehydes.

[00:14:49]Fehling's only reacts with aliphatic aldehydes not the aromatic aldehyde but they have written clearly in this question it neither reduces tollens or fehling's reagent. So definitely this ketone is the answer.

[00:15:01]NCERT may be getting about NCERT is writing.

[00:15:06]It does not decolorize bromine water.

[00:15:10]It will be decolorize because it is having alpha hydrogen it will tautomerize and while doing tautomerization it will convert into this.

[00:15:19]So NCERT is not perfectly right and this is having unsaturation. It will decolorize.

[00:15:25]Even NCERT is not right.

[00:15:28]But benzaldehyde is not having alpha hydrogen. That will never decolorize bromine water. So, more appropriate answer is definitely the third one.

[00:15:38]Everyone is saying that only second is the correct answer. Why? Why? This is the more appropriate answer, and it is having two COH.

[00:15:46]Let me tell you the benzoic acid Let me tell you why it is more appropriate. Benzoic acid pKa value is 4.20. 4.20. And this is terephthalic acid. This is terephthalic acid, and its pKa value is Its pKa value is you can check that it will release two hydrogens. The first hydrogen will go, and its pKa is value is 3.6, and second will go, it will come something 4.2 something. So, this is more acidic, and it will release carbon dioxide more easily. It will give more appropriately the sodium bicarbonate test. So, this is more appropriate answer, my dear students.

[00:16:37]And I've shown you Some people were saying that if CH3 is there, CHO is there, side chain oxidation will not take place. And I've shown it from foreign writer books. You see Morrison bio. Those who are saying that that electron withdrawing group is there, so no no side chain oxidation.

[00:16:53]See, this is Morrison bio, the god of organic chemistry book.

[00:16:59]And it is having electron withdrawing group, and it is showing side chain oxidation.

[00:17:06]Right, my dear students. So, these are the three questions, and these are the proofs. You can challenge all these questions. Bye-bye. Take care. All the best, kids. Any help you want from Baba HSS site you want from Baba HSP side, I'm always ready. Now I'm with you. I'm the students power. I'm working for all the students.

[00:17:31]Jai Hind. Jai Bharat.