JEE Chemistry Club

Dante

08:02

@PolarBear @AdvilSell Could you remind me of something in physics which people tend to forget?

I'm confused what to revise in physics ;_;

PolarBear

NCERT, they forget to read NCERT.

Dante

nvm

PolarBear

Everyone thinks only just chemistry.

Dante

Not thinks, it's the fact

It's useful only for chem.

ig

:p

Any topic/formula you can think of?

PolarBear

Okay ¯\_(ツ)_/¯

@Abcd You don't have the solutions for the paper?

Oh, when you come please post them

Dante

08:14

Oh, kay

So it was Esha

Now I getit

@PolarBear @AdvilSell Small doubt, won't take much of your time. Is$[Cr(H_2O)_3Cl_3]$ violet while $[Cr(H_2O)_3Cl_3]3H_2O$ vellow green because water is stronger ligand than halied?

PolarBear

1

Q: Is chromium (III) green or violet in solution?

Is chromium (III) green or violet in solution? In terms of oxidation reactions between chromate and $\ce{Cr}$ (III) it forms a green color in solution, but when I searched online in different sources it seems to say that it is actually purple. Which is the right answer?

Esha

Starring non starring

I was doing that yesterday

Dante

Oh lol.

PolarBear

@Dante Your question is wrong

Dante

What?

PolarBear

$\ce{[Cr(H2O)6]Cl3}$

and

$\ce{[Cr(H2O)3Cl3]*(H2O)3}$

Dante

08:22

Ah, right sorry

PolarBear

Former is purple and latter green

Stop messing the stars esha we know you're too happy

Dante

Yes, is the reason water being stronger ligand?

PolarBear

10

Q: How hydrate isomerism results difference in colours?

The standard example is $\ce{CrCl3.6H2O}$, which can have three distinctly different crystalline compounds now known as $\ce{[Cr(H2O)6]Cl3}$ (violet), $\ce{[CrCl(H2O)5]Cl .H2O}$ (blue-green), and $\ce{[CrCl2(H2O)4]Cl.2H2O}$ (dark green). How does this difference of ligands in octahedral sys...

coordination-compounds color

SE has answers to everything

Dante

Thanks.

@PolarBear You are doing it now.

PolarBear

No

Dante

08:33

Okay, so can we justify that if splitting is more, higher frequency of light is absorbed?

Esha Manideep

@Dante What ?

@PolarBear what are these RTPF papers, where are they ?

@PolarBear it's not me.

PolarBear

@EshaManideep Secret

@EshaManideep There was no one else in the room. Except well.. Advil was joining and leaving again and again. Oof.

Esha Manideep

@PolarBear Can you give me a link to the room ?

PolarBear

@Dante Yes, because electrons require more energy to upgrade

@EshaManideep Secret ;P

You may find it on your own

Esha Manideep

@PolarBear Let me search. If I cant find it, please gimme the link, okay ?

PolarBear

08:47

@EshaManideep lol okay.

Advil Sell

@PolarBear no that wasn't so , actually I have logged in in my phone , and even if I leave the grp. on my PC sometime afterwards I will return

Esha Manideep

@PolarBear Name ? :P

PolarBear

Then.. that was.. Dante

Esha Manideep

Of the room

PolarBear

@EshaManideep Wow very cool no use of searching then

Papers something

chat.stackexchange.com/rooms/91904/only-papers-jee

Esha Manideep

08:48

Got it.

PolarBear

Enjoy. What can I say.

Now we need to repay abcd for all those papers

Advil Sell

@PolarBear yeah @dante is the culprit , also he always accuses others hence he is the ONE

Esha Manideep

@PolarBear How ?

PolarBear

@EshaManideep I don't know :P

Esha Manideep

Actually I had FT-I, ppr 1

PolarBear

08:51

That's RTPF not AITS

RTPF paper 1 was posted in this room.

Esha Manideep

I can share Narayana papers if you guys want them

Dante

@AdvilSell Wth I was having a nap

Just woke up, making my coffee

@EshaManideep Narayana AP/Telangana?

I thought you were from Vibrant

Esha Manideep

@Dante Telangana N120

@Dante I am not from vibrant, neither from Narayana

Dante

Oh, awesome!

@EshaManideep Then?

Esha Manideep

Delta Junior College, Hyderabad

Dante

09:02

I thought N120 was a branch in Narayana lol.

Esha Manideep

@Dante It is.

Dante

Ah ok, got it. So you've got n120 papers.

PolarBear

I didn't do that how the hellll

Esha

Not even him

who the hell discovered this trick of not being in room and yet starring

Die you

I will die laughing now

Dante

I swear it's Esha

PolarBear

No, his messages were starred too

Dante

09:14

Wtf

Advil

He's stalking the chats

PolarBear

Last seen 4 minutes ago

Dante

And leaving frequently

@PolarBear That doesn't work

McSuperbX1

prnt.sc/n9yns5 Can someone explain whats going on here?

Dante

Image not found.

McSuperbX1

uh oh.

Dante

09:15

use imgur

PolarBear

I really can see nothing but blank white image

I didnt

Dante

It's Kesha!

PolarBear

Who's that?

Dante

Esha

PolarBear

Esha Mandeep dinne stop

lmao

Advanced is one shift only? XD

Why removedddd

Dante

09:19

Lol, I think I didn't sleep properly

PolarBear

You're on aops too?

Dante

No lol, not my cup of tea.

PolarBear

Wut cup of tea? xD

Dante

It's where they discuss all high level questions right?

PolarBear

No

It's a forum

Just like any other but like the most famous one, especially for math Olympiad.

And of course I'm talking about community, there's more to the site.

Dante

09:21

Oh, I see. Is it helpful in any way for JEE?

PolarBear

I can't really comment.

Dante

Hmm

Advil Sell

@Dante What ?

Dante

Nothing, it's fun blaming you

Advil Sell

@Dante lol man , was the messages staring and unstaring again ?

PolarBear

09:24

Guess what

Starring stopped the moment advil entered

Dante

I knew he's the one

Look at his avatar

McSuperbX1

prnt.sc/n9ytf6 it works finally

explain wtf is going on please c:

Advil Sell

@PolarBear Oh...come on man(I meant women)

PolarBear

I have a secret useful feature to upload images on phone within 20 seconds.

WHY AM I SO JOBLESS?

I'm taking sanyas

I would have achieved so much only if I had studied all this time

All these 2 years

Now we have advanced

McSuperbX1

@PolarBear i started studying like 3-4 months ago lol

PolarBear

09:28

Hey starrer, you listening to me? If yes star this message

Dante

@McSuperbX1 I started 3-4 months before that ;P

PolarBear

Okay. Let it be starred.

McSuperbX1

@Dante smart.

Dante

Thanks

McSuperbX1

answer ma question pls im confused af XD

PolarBear

09:29

Now @AdvilSell star it

Advil Sell

@PolarBear Done

PolarBear

My message

1 min ago, by PolarBear

Hey starrer, you listening to me? If yes star this message

Starrer please star it too

Starrer?

We know the starrer

There's only one star

Advil Sell

@PolarBear ohh....I surrender

Dante

@McSuperbX1 Acylium cation is formed at first.

Then EAS

McSuperbX1

ugh can you explain it a bit more

Dante

09:32

Do you have solomons?

McSuperbX1

No.

Dante

Sed

McSuperbX1

if you could just draw it out and post a pic here i would be very very grateful

Dante

one sec,

McSuperbX1

thanks =]

Dante

09:35

Okay, see this, under mechanism

3

Q: Friedel-Crafts synthesis - How is HCl produced?

In the mechanism for the acetylation of bromobenzene, how is $\ce{HCl}$ gas produced? The reactants are acetic anhydride, bromobenzene, $\ce{AlCl3}$ and dichloromethane. Initially, 4-bromoacetophenone is made, accompanied -by as far as I know - with acetic acid and the regeneration of $\ce{AlCl...

homework experimental-chemistry synthesis aromatic-compounds

You can find the picture here

McSuperbX1

Oh right

tysm xD

Dante

Have fun

Advil Sell

@Dante ugh....You were correct

Dante

Correct about?

Advil Sell

@Dante starring

Dante

09:38

I knew it, no one else could do it XD

Btw, were you starring when not in the group?

Advil Sell

@Dante I figured out something

Dante

What???

Advil Sell

I won't let , of course XD

Dante

ok

Advil Sell

@Dante $\large{cool}$

Advil Sell

09:50

@Dante

Dante

Yeah?

Advil Sell

quick question :

Dante

Okay

Advil Sell

if mirror is rotated by x then reflected ray will be rotated by ?

Dante

2x

Advil Sell

09:51

@Dante correct

@Dante do you know that where to read about silicones ?

Dante

NCERT

Advil Sell

@Dante not enough

Dante

More than enough for main

Tell me one question outside NCERT

Advil Sell

Question came in Mains wasn't from NCERT , the amorphous silicon one I think

Dante

It is there in NCERT

Advil Sell

09:54

@Dante where Pg. No. ?

Dante

321

It's not silicones, it'a form of silica

Advil Sell

@Dante Oh...okay got it thanks :D

Dante

Np

McSuperbX1

can you explain me how to find hardness of water in ppm of caco3

cant find any reliable source in the moment

Dante

Oh, I had to study that myself

Give me few minutes

McSuperbX1

10:01

let me type it out and you guys can see if i am right or not.

find individual moles of the stuff that causes hardness

Dante

$Degree-of-hardness=\dfrac{n10^8}{w}$ppm

McSuperbX1

divide that by the amount of water it was found in (ml)

Dante

n=number of moles of salt

w=weight of water in grams

McSuperbX1

what kind of salt

like

where the charge on both ions is 1

or charge on both is 2 (just like in caco3)

that factor needs to be taken in right?

i.e the equivalent number of moles of salt

Dante

Salt in the sense number of moles of Calcium and Magneisum ions

Which cause hardness

McSuperbX1

10:06

@Dante Ah that is with respect to Ca2+

If the stuff that causes hardness is CaCl2 OR CaSO4; it doesnt matter as long as their moles are equal right?

Dante

Could you put the question here?

@McSuperbX1 It shouldn't I suppose.

McSuperbX1

@Dante Why is that? Both are Ca2+ ions?

Dante

'It shouldn't matter' I meant.

McSuperbX1

@Dante Oh lol.

prnt.sc/n9zhun

heres the question, btw

Dante

@AdvilSell Quiz, what is calcogen formula?

@McSuperbX1 Thankss!

I asked you because I had studied it yesterday and forgot today ;_;

Advil Sell

10:10

@Dante ?? Chalcogen are O S Se...

Dante

I only remember it has sodium.

Advil Sell

@Dante what is calcogen ??

Dante

calgon* sorry

lol

Advil Sell

Na6O18P6

Dante

smart

Why Can't I remember ;_;

Advil Sell

10:13

@Dante no need

McSuperbX1

Anyone know how to memorize coloured lanthanoid ions?

Dante

It's important -_-

@McSuperbX1 Unpaired electron ---> Coloured

Advil Sell

@Dante -___- no , it will never come

McSuperbX1

@Dante Basically look at electronic configuration then, right?

Dante

Yeah

@AdvilSell

McSuperbX1

10:16

Annoooother question: alpha hydrogen beside a ketonic group is more acidic or beside an aldehyde group?

Advil Sell

@Dante yeah

Dante

Share good problems in maths and chemistry if you encounter

Thoda revision ho jayega ;_;

Advil Sell

@Dante Okay , But I won't be doing any problems now , only revision

Dante

Hmm okay

aldehyde I suppose, ask advil haven't completed this chapter yet

Advil Sell

@Dante what ??

Dante

10:19

2 mins ago, by McSuperbX1

Annoooother question: alpha hydrogen beside a ketonic group is more acidic or beside an aldehyde group?

Advil Sell

Okay so POl is messing This now ?

Dante

Who cares answer the question please.

Advil Sell

@Dante It's not general , Always you have to compare the carbanion stability

Dante

Oh

@McSuperbX1 Send the enol question

I had doubt in it too

McSuperbX1

@AdvilSell Acetone vs acetaldehyde

@Dante Not a question - but had a doubt of my own.

Dante

10:22

Oh, ok.

Advil Sell

@McSuperbX1 I think Acetaldehyde

Dante

What are you revising exactly?

Give some tips/idea ;_;

Advil Sell

@Dante everything , seeing all the formulas and Stuff

Dante

Hmm. Kaise bhi karke 99.75% chahiye is time ;_;

Milega ki nahi doubt hai

What marks are needed for 99.75 approx.?

Advil Sell

@Dante Milenge , Chill out ,Just study

@Dante 250 shayad

Dante

10:28

Oh, looks difficult, but will try

Advil Sell

@Dante easy for you !!

Dante

Don't talk bs

You know me

Advil Sell

@Dante No bs , seriously , You can get it

Dante

Well, let's see.

Keep faith ;_;

And work hard!

William R. Ebenezer

10:49

0

Q: Role of pH in azo C-coupling reaction, continued

In the preexisting question asked by @DhrubaBanerjee and answered by @Klaus-DieterWarzecha, I find several ends untied. My query is twofold: The $\ce{-^+NH3}$ group is inductively deactivating (as mentioned here). That is a turn-off for attacks on electrophiles (like a diazonium cation). But ...

organic-chemistry experimental-chemistry reaction-control

Avka

The iitb thing was a joke

William R. Ebenezer

Do help if possible

Avka

@Dante @PolarBear Nazar laga di i got 76 I math today

William R. Ebenezer

@Avka when was your mains?

today?

Dante

@Avka Maine nahi lagayi, DC ne lagayi hogi

Which paper btw?

Avka

10:54

@WilliamR.Ebenezer it's on 12th (2nd) slot

William R. Ebenezer

@Avka oh

Avka

@Dante 11th 2nd

Dante

Oh, does it have toughest maths?

Or sillies?

Avka

@Dante what's your slot I remember it's on 12th

Dante

First

Avka

10:56

@Dante silly

Dante

Ah, damn

@YUSUFHASAN Halo

William R. Ebenezer

Minecraft?

Dante

ARK

William R. Ebenezer

Does anyone play minecraft?

@Dante this ark? store.steampowered.com/app/346110/ARK_Survival_Evolved

Abcd

@PolarBear did you attempt.... It's so hard like aits lvl

These people don't spare chemistry also ;_;

William R. Ebenezer

11:08

@Abcd what are you referring to?

Abcd

@WilliamR.Ebenezer rtpf paper

William R. Ebenezer

Oho

Dante

@WilliamR.Ebenezer Yeah, I don't play it lol.

Can buy it but my PC can't take it XD

Do you play any multiplayer?

Other than minecraft

I used to play TF2 few months ago.

William R. Ebenezer

11:23

@Dante Yes, I play FSX. It has multiplayer.

Dante

Flight simulator?

Abcd

@AdvilSell where did you get this data

William R. Ebenezer

@Dante yep!

Dante

@Abcd It must be more than 250 right?

@WilliamR.Ebenezer Oh, we have different choices XD I prefer FPS in multiplayer.

Advil Sell

@Abcd just a guess - "shayad"

William R. Ebenezer

11:25

@Dante you may be a fan of pubg then?

Advil Sell

@WilliamR.Ebenezer please don't take that damn name , reminds me of old days

Dante

I have a sucky PC.

@AdvilSell It's a new game

Abcd

@Dante much more

Dante

What old days.

@Abcd Hmm

William R. Ebenezer

@AdvilSell lol

Abcd

11:27

@AdvilSell can you please give exact number of students of mains 1

Dante

875000

Advil Sell

@Dante noooo.....it's not , well I was referring to time I used to play it and then deleted my account

Dante

Oh, pubg mobile?

William R. Ebenezer

@AdvilSell I read on news that it was banned

Advil Sell

@WilliamR.Ebenezer yeah I'm some states

@Dante yup

@Abcd looks like reso was correct about that coupling reaction question

Dante

11:35

What was the question exactly?

Abcd

@AdvilSell don't ping me with anything related to my ppr sorry

Advil Sell

@Abcd okay sorry :'(

Dante

You've attempted 72 with no guess -_- What are yo even worried about.

Advil Sell

@Dante arey you asked that question

Dante

Yeah but abcd said it was different

Maths grp :-

PolarBear

12:16

@Avka Total Kitna? ಠ_ಠ

@Abcd No, I didn't. Had to go out.

Dante

Dekh aankh phad phad ke nazar laga rahi hai.

PolarBear

@AdvilSell I know how to do that.

Advil Sell

@PolarBear Yeah I know you were even doing that

PolarBear

Yep :)

What are you people online like whole day

4

Avka

12:47

@PolarBear 278

Dante

@Avka quick question.

If all observations are multiplied by K, standard deviation becomes K times or variance?

Avka

@Dante sD

Dante

k

@Abcd @AdvilSell @Avka

Oh sorry wrong ping, wanted to ping in chem group.

Abcd

13:03

← 2 messages moved from JEE/High School Maths Problems

Dante

How does $M(AB)(CD)$ complex show only 2 geometrical isomers?

Abcd

@Dante Two are : A on C side and A on D side

Dante

Shouldn't it be 3 like $M(ABCD)$?

Abcd

@Dante Suggest a third one fast

Dante

let me think

I just saw an example where A and B attatches on opposite sides (ADBC) in clockwise direction.

Let me find it

Oh damn, hold on

@Abcd Right, only 2 thanks.

Dante

13:22

@Abcd @AdvilSell @Avka Do you have inorganic archives in PDF or anything like that?

I think trying out some questions will help me make me revise stuff.

I do have archives but it's main+adv mixed.

McSuperbX1

Can two successive 1-2 carboncation shift happen?

Dante

why not

McSuperbX1

for example: take 3-methylbutan-1-ol and add h2so4 to it. a primary carbocation has formed. then it recombines to give a secondary carbocation. however now it again recombines to give a 3 degree carbocation.

so it goes like 1degree -> 2 degree -> 3 degree

better everytime

@Dante okay

hm so if a carbocation can get more stabilized after each iteration - it will do so?

Dante

yeah, generally.

McSuperbX1

Alright - thanks mate.

Avka

13:45

@Dante nope sorry

Dante

Okay, it's fine.

PolarBear

@Avka Nicey nice

Transcript for