Identification of functional group 12th chemistry practical #12thchemistry #lab @a2zpractical991

Hello friends, my name is Sachin Shukla and you are watching A2Z Practicals So, friends, today's experiment—today I'm going to perform a functional group analysis. In the 12th, your identification group, experiment number 18 Which I am going to identify different functional groups How will you know in which compound there is an aldehyde, in which there is a carboxylic acid, and in which there is an amino group? So how will you know these things? So this is your Experiment Number 18, which is listed in the 12th Handbook. And I'm going to explain it to you in a very simple way. So, friends, let me tell you one more thing—I have another channel, The Chemistry Tadka. Its link is in the community tab, and in the description, you can go and see. These are very interesting and fascinating things. That means it's an interesting experiment, not all of this. It's a different kind of experiment, which you'll want, and you'll like it very much. So if you want, you can go and see those things So let me explain your 12th experiment to you. And I will also write all the answers to you So that you can write it very well in your handbook So, friends, let me tell you that your first identification is the carboxylic acid group. You are seeing that your carboxylic acid group looks like this So how will we know that there is a carboxylic acid group in any substance? So let me show you that So, friends, your first test is the test for the carboxylic acid group. So what you have to do is take the substance So, friends, keep one thing in mind If you have ever used a test tube, then reuse it. So be sure to use a test tube holder with it Because any substance can fall at any time So this is given to you You have to take a little salt from it. And now what else do you have to add to it? You have to add 10% sodium bicarbonate (NaHCO₃) to it. So I have this NaHCO3 solution Now what will I do? I'll add it to it. So you have to keep watching the observation. What substance should be soluble with Briggs effervescence of CO₂? What is Briggs effervescence, see Now as soon as I add it, if CO2 bubbles come in, So, you're seeing CO2 bubbles in it. Clear, so these CO2 bubbles indicate that CO2 is present in it. Then your carboxylic acid group will be present. Will be present in it If these bubbles do not come in, then what will be your carboxylic acid group? Will be absent, clear So you've understood this, so such CO2 bubbles should appear in it. And as soon as these CO2 bubbles emerge in the form of gas in the effervescence So what will be your carboxylic acid group? Will be present So, friends, your second test is for phenolic. It means you are given a sample and you have to test it. Is there a phenolic group in it or not? So if this phenolic group is present Then you should get violet, green, and blue colors in it. So let's see and tell you I'm just telling you the result here. The result means that I am showing you the present directly. Because if you are present like this, then you will receive it like this So what you have to do is take the test tube. Again, whatever sample is given to you, you must take it in. Now what's being said here is that you have to add a little water to it. Add a little water to it. Clear After putting a little water You have to add neutral FeCl₃ to it. I have FeCl₃ present here You will get it in the lab reagent You have to add it in and see what changes we get So as soon as you add it in, it Its color turns green. You will begin to see this light green It is not completely green. It starts to come in a little green. It begins to come in green I keep it for a while But you see this green color And it comes like this after dissolving Here you will see green So what will happen to your phenolic group here? Present The fourth test is the test for the ketone group. So if any liquid is provided to you Then whatever is provided So if you want to test whether a ketone group is present or not Then you should take a little liquid. And again, the next step is to add a few drops of dilute NaOH. So I've added a few drops of dilute NaOH here. Clear After adding a few drops You have to add a few drops of sodium nitroprusside to it. So I have the solid form of sodium nitroprusside. You have to turn it into a liquid. I'll put a little solid in it And I will show you how this test comes about. I have some particles of sodium nitroprusside. See this What do I do in this? I add Clear You are seeing The color should come How should it come about? Red blood And you will begin to see the red blood color emerging here Clear So if this red blood color comes What is the ketone group? Present Now you are seeing this entire thing It turned red. So if you get such results So what will happen to your ketone group? Present Clear So let's go This is your ketone group. Present So friends Next test Test for amino group Means if in your compound or sample The amino group will be present. So what will be the result? This amino group is given to you It is called substance. What is it called? Substance You will be given just like this Substance What I added That amino is present in it So don't see that You see That you will be given such a substance You must take the substance. Place a test tube on it. Clear What to put in it Concentrated acyl Clear You have to put concentrated acyl in it. You must add the acyl group very carefully. See, I have put Concentrated acyl Shake it well Clear And if you cool it in tap water It will be better I have cold water. Means Liquid So what am I doing in it? I'm taking it easy. Clear It will cool down very well after a while. Now Now what you have to do Take another test tube And you have to prepare a NaNa2 solution in it How will you prepare a Na₂Na solution? Maybe you'll get it made Or you have to make it You have to take a small amount of Na₂CO₃ solid. Your NaNa2 solution is ready I have put water in NaNa2. Put water This NaNa2 solution is yours Freshly prepared It is made quickly. Now what you have to put What to do with this NaNa2 In excess Add this solution That is your test tube number 1. What do you have to do in it? Add it While shaking Like this Add a little And shake a little Add a little Shake a little Clear Both are cold So it is very good Temperature does not increase Add a little Shake a little Clear Now your test tube number 1 What happened after being made here Ready I'll keep it here to cool down further Now you have to take another test tube. And what do you have to take in it? Beta naphthol in NaOH See this I have this. Beta naphthol in NaOH It is already made. You have to transfer it into another test tube. Clear Now what do you have to do This cold solution Test tube number 1 Clear You have to put it in test tube number 2. Means the aniline you took in it This solution has to be put in it. Not this in it You have to put this in it Remember If you do not do this Then your reading is incorrect. Your test can be wrong So what do you have to do in it? You have to add So you are seeing here An orange-red dye is being produced here. Clear If it stays cold It yields a very good result. So you are seeing here An orange-red dye is found here. From which we know What is the amino group present here? If you get such a result So what will be the amino group Present Clear Now we will proceed to the final 7th test. Test for alcoholic group Won't know What's in it? So how can you find out So you take this sample And look at this A test has been given. That you have to take a very small piece of sodium Extremely small I have sodium. And friends, you know Sodium is extremely dangerous. So I will take very small pieces So I remove the sodium here Careful I have removed sodium here I will cut it into very small pieces. And whatever sample you are given You can add it in there. But you have to cut it into very small pieces. So what you have to do now Whatever sample is given to you You have to add a small piece of sodium metal to it. Let's see what it looks like If after adding sodium metal If you observe effervescence of H₂ And if you don't get it So what will our group be? Absent Let's add it in. So you are seeing Bubbles have started forming in it. Clear Now from this bubble we know That hydrogen gas is present in it And you can see these bubbles clearly Clear friends What happened here? Effervescence of H₂ gas That's why There is an alcoholic group present here. The ROH group is present here. So friends You have seen all these identification tests. How I have shown The answer key is also beside me. You can easily write the answer key. Like when the carboxylic acid group is present When the phenolic group is present When will this group be present? When will that group be present? You can see all the answer keys here So friends Let me tell you one more thing You can perform the practical very well by referring to this answer key. You can write in your handbook And you can also prepare very well One more interesting fact Let me tell you That I have another channel MSG Tadka You will find its link in the community tab or in the description of this video. Go and watch that video. And there is an explosive experiment inside it. Thank you for watching this video And please subscribe to A2J Practicals Thank you