GROUP 15 P BLOCK MCQ IMPORTANT SOLVING SEMESTER 3 II RICHA EDUCATIONAL INSTITUTE II

[00:00:04]Hello everyone Hello hello everyone Hello Utkarsh Hello MD Nawaz Hello Sanjana Tejas Aadiya Hello so many of you attendance please please write your name first who all have come to see you today very important class of semester three very important class Harshit Burman Hello Harshit Harshit but your Harshit there is no class today, class is tomorrow Harshit of class 11 Utkarsh Gupta Hello ok class 11 Harshit Shivani Hello Shivani Hello son Sonali welcome welcome to my channel ok are you doing this from class 12 or for revision of 12th pass out students hello Etesham zx x10 r gamer 557 my god what is your name Raj Laxmi Sharma hello good evening Shivani Harshit very good Bablu Nayak Hello Bablu Penguin Penguin Hello hello bachcha people your mom is here Sanjana Shah ok Sadia Penguin so today P block group Will do 15 questions.

[00:02:44]So let's check how good you are.

[00:02:47]What's up Ayush JE aspirants? Hello Ayush welcome where is Sidra, those people always watch.

[00:02:58]Tanishka who is online all the time. Sanjana Where are you guys?

[00:03:09]Okay, let's start the question of group 15. The students who will come will join by adding on and will keep watching.

[00:03:16]Okay Bablu Nayak Ma'am I have some important work so I can continue the class. Okay, no problem Bablu, you will watch. Afterwords.

[00:03:23]Hello Sanjana. Hello, welcome Sanjana. Okay Bablu, see you.

[00:03:32]So, let's start some important questions of group 15. P block. Group 15 are also called Nikogens Nikogens. Okay, yes, ma'am, thank you, I have a thumbs up. Let's start this very important class. The mic is getting stuck. Why is this happening with class 12?

[00:03:56]Why is this not happening in class 11? The mic is getting stuffed. Why is this happening with class 15?

[00:04:18]Okay, our first question in front of us.

[00:04:23]Is your voice lagging or is the voice lagging? I just checked it, it is lagging right now. Let's check what happens next. First question of group 1, first question of group 15. Question here is the first question in front of you tt tt ok topic all these will be covered here first question the outermost valence electronic configuration of group 15 what is the outermost configuration of group 15? We do n't have to play with voice too much. Have to play with questions. Tell me the options and write the answers. Two, which group 15 will this answer belong to, we will know from that.

[00:05:10]Which answer of Group 15 will go here? Balance Configuration of Group 15 Which option is correct? NH2 np2, ns2 np3, ns2 np4 and ns2 np5 Option B Sure. Group 15 That Means Who Got Into Group 15? Nitrogen. Let's look at any one.

[00:05:43]If we look at phosphorus near nitrogen, seven 1s2 2s2 4 and 3 7 2s2 2p3, then its answer will be 3s2 3p3, so everything is ending at p3. So what will happen here? Option B. very good. The correct answer is option B. very good. Excellent. The correct answer is option B. ns2 np3 Very good.

[00:06:03]So this is the correct answer option B. Did you get this answer? Did everyone understand? If you are solving it after a long time, then you will feel a little good that after a long time you are solving something good. So B is the correct answer.

[00:06:19]Next B is the correct answer.

[00:06:23]Next question in front of you.

[00:06:27]Next question is in front of you.

[00:06:31]Nitrogen does not form pentahalide as NCL5 whereas phosphorus can easily form PCl5 Phosphorus can form PCl5 but nitrogen cannot form NCL5 What is the reason behind this Nitrogen has no D orbital and can not expand its valency beyond four Can reach the fifth oxidation state It is larger than phosphorus, It is less electronegative than phosphorus. So which is the correct answer?

[00:07:08]Which is the correct answer? You are talking a lot about option CAA. So let's apply it one by one. Nitrogen can never form NCL5. But phosphorus forms PCl5 easily. What is there in region nitrogen? What is the problem? It is larger than phosphorus. This can never happen.

[00:07:33]That means C will not be yours. It is smaller than phosphorus. Correct. It is less electronegative. No more electronegative. If it could reach +5, it could make NCL5. So B will also not happen.

[00:07:46]The correct answer is one. It does not have a d orbital because there is no d orbital in the 1s2 2s2 2p3 orbital.

[00:07:57]So its one box of s, three boxes of p, so 1 2 3 4, its covalency will go up to four only.

[00:08:05]1 2 3 4 It does not have d orbital. So what is the correct answer? The correct answer is option number A. Very good A Radha Sharma very good.

[00:08:19]Radha Sharma who are you son Shivani A or Poonam J6 G2 Hello Poonam Shahina Shivsha Hello Shivsha Sidra Naz ok hello Sidra I was searching for you only where is Sidra I did not understand this penguin Amrita Sharma look I had got this written in the copy that nitrogen and phosphorus I will write it here again nitrogen forms NCL3. But cannot form NCL5.

[00:08:54]Look at Reese. The atomic number of nitrogen is seven. Ok? We know that the atomic number is seven. Seven means 1s2 2s2 2p3 Now if a bond has to be formed with someone then the last orbit participates.

[00:09:12]Last Valence Shell. Ok? So a box of 2s.

[00:09:17]And these three boxes of 2p.

[00:09:22]Ok? Nitrogen has two electrons in it and 2p has three electrons in it. This is how the structure of nitrogen looks like at 2s 2p. This is the ground state. This is how the real nitrogen looks like. Now if chlorine comes, chlorine. If three chlorine comes, then three chlorine can come and join here. Three chlorine. Ok?

[00:09:46]But if five-p chlorine comes then after this, does 2d exist after 2s and 2p in orbit number two? Doesn't do. If 2D does not exist then there is no d orbital.

[00:09:58]So if five chlorine comes, there is no place to store it.

[00:10:03]There is no space. It cannot expand.

[00:10:06]Nitrogen is unable to expand. There is no other shell in this orbit. There is no orbital to keep it.

[00:10:18]Okay, so hey, what's up?

[00:10:24]Hello hello hello yes the screen is frozen. OK, let's recheck once.

[00:10:41]Rei goes again.

[00:10:45]Hit refresh. Let's check what's happening.

[00:10:48]Refresh refresh reload reload I did it. Hope is heard.

[00:10:58]I have reloaded. Hello hello hello why is it freezing?

[00:11:08]Hello hello hello hello hello hello the sound is clear ok the sound is coming then why is it freezing the sound is coming free ok clearly but the screen is frozen what happened to my screen check it in the studio is everything fine there hello everything is going well here then where is the problem? Should we start the stream again and then end the stream again? Let's reload by doing end stream. Come on brother.

[00:11:55]Chal Mere Bhai. Let's start again.