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John Rennie
John Rennie
09:30
@Sarabsrimt I'm retired now so I mostly spend my time messing around and having fun :-)
 
1 hour later…
Sarabsri mt
Sarabsri mt
10:50
@JohnRennie Ohk.😊
I know from all my textbooks books that $SO_4$ has a -2 charge I.e S=+6 and O=-8 charge. My Q is how did we find it and solve it . Like for every Q I solve . For example , KMnO_4. K= +1. O=-8. So , to find for Mn we equate all the charges to 0. So , Mn=+7. But why not the same case for SO4?
Can you help in this Chem Q.
@JohnRennie Sir
Wolgwang
Wolgwang
@Sarabsrimt Because $\mathrm{SO}_4$ is an ion while $\mathrm{KMnO}_4$ is a compound.
Sarabsri mt
Sarabsri mt
Ohh
Its like Na+ ion
but so4 2- isn’t stable?
Wolgwang
Wolgwang
@JohnRennie Hi
I forgot to wish you on your birthday :-(
You were not online when I wanted to wish you, then it slipped out of my mind, and today, which is pretty late, I realise..... Happy belated birthday
Sarabsri mt
Sarabsri mt
Oh. Happy birthday sir
Belated
Wolgwang
Wolgwang
@Sarabsrimt $\mathrm{Na}^+$ is a monoatomic ion while $\mathrm{SO}_4$ is a polyatomic ion. Sodium ion is formed by donating 1 electron so it is stable and the polyatomic ion is complex and I don't have knowledge about it.
Sarabsri mt
Sarabsri mt
11:15
Ohk.Thanks btw. This helps a lot
Wolgwang
Wolgwang
11:34
:-)
John Rennie
John Rennie
12:01
@Sarabsrimt you have to just remember it.
Luckily there are only a few common anions so they aren't hard to remember.
@Wolgwang thanks :-)
Wolgwang
Wolgwang
:-)
Sarabsri mt
Sarabsri mt
12:18
@JohnRennie ohk. Sure sir
Bhavay
Bhavay
12:39
@Sarabsrimt You have to make lewis dot structure.
Or there is a general guideline you could follow.
Range of oxidation no. for p block elements :
Max ON : Group no - 10
Min ON: group no. - 18
If in any compound this rule is violated , Then oxidation no. = Max oxidation number in that case.
 
1 hour later…
Sarabsri mt
Sarabsri mt
14:05
@Bhavay Thanks a lot. I’ll remember it
 
3 hours later…
user586228
user586228
16:48
Anybody who can help me with unacademy ssubscription?
Bhavay
Bhavay
17:01
@user586228 what help?
user586228
user586228
17:45
user image
@Bhavay I have a problem here..
user image
What do these dates correspond to for a course that I am taking..
I joined today only..
Buraian
Buraian
is this the engineering to MBA path that people were talking about :P
user586228
user586228
These dates are in future...
@Buraian Yes..
Sort of..Moving to banks..
Buraian
Buraian
gotta get that money :P
Engineering is oversaturated anyways, good for you that you decided to switch
collegedekho.com/news/….
user586228
user586228
Thanks...@Buraian Can you help me with this doubt..
Buraian
Buraian
The unacademy thing? Not quite sure on it. I don't use any coaching platforms personally
There is a free utube course ware called MIT OCW and they have some high level topics abt economics and all, u shuld check it out
user586228
user586228
17:51
ok no problem..Can you predict the way I am supposed to use this...
There are dates corresponding to videos..
I am hving trouble to understand how I am supposed to use it..
Buraian
Buraian
Oh yeah I think I've seen this
basically when it's that date, there will be a video to click there
so, it's like the button to use it only comes when it's on that date
user586228
user586228
But I find a video already present in that date!
Buraian
Buraian
whut
can you explain a bit more?
user586228
user586228
@Buraian unacademy.com/batch/target-ibps-po-2021-864/9RIJFLK9/schedule
Check this once..
Buraian
Buraian
yeah the videos which are there are for dates which have already passed
user586228
user586228
17:59
Thanks a lot..

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