Problem Solving Strategies

@blue Engineering Physics is good, a few friends of mine are doing that. Btw, all the physics they teach you at BITTS and IIT's are sorta like engineering physics. Madras has a great Engineering Physics program, my friend is currently pursuing his third year there.

Anonymous

@NaveenBalaji Oh that's great to hear. I think I'll join that! :)

Anonymous

Lets see how the ranks go :P

Anonymous

1:54 PM

Aniline vs Ortho Methyl Aniline. Which is more basic and why ? @Yashas (Just for revision =P)

Yashas

ortho effect

Anonymous

Answer?

Yashas

ortho methyl aniline

electrons are delocalized in aniline

you lose planarity in ortho methyl aniline

and hence resonance is not possible

no delocalization = electrons stay with the nitrogen

Anonymous

I am talking in solution phase. Which is more basic in solution phase?

Yashas

hence more basic

You have NH3+ then

Anonymous

1:55 PM

@Yashas No no

Anonymous

It's in plain water

Anonymous

Ok fine

Anonymous

You can say that

Yashas

there will be hydrogen bonding

Anonymous

Then?

Anonymous

1:56 PM

Answer?

Anonymous

@Yashas yes, so?

Yashas

thinking...

I should probably ignore the kinetics

the one which forms NH3 will be stabilized by water

so it will be stronger

Anonymous

Both will form NH3+ in water...but whose Kb is higher?

Yashas

the one with CH3 will form faster

hmm wait

this is confusing

Anonymous

Well, it doesn't have much to do with loss of planarity...

Yashas

2:00 PM

I am not ready to think lol

Anonymous

in solution phase

Yashas

I was filling JEE Adv form

Anonymous

I will fill at 12

Anonymous

tonight

Yashas

...

30 mins and I am still struggling to login

Anonymous

2:02 PM

Do it at midnight...servers will be less loaded then

Anonymous

jeeadv.ac.in

Yashas

wut

Year of First attempt in JEE Advanced

the only option is 2017

lol

wth

Anonymous

What?

Anonymous

Really?

Anonymous

:O

Yashas

2:05 PM

-_-

I used 2017 for Year of Passing or Appearing: in JEE Main form

that is why it is confused I guess

but I am really passing in 2017 -,-

Anonymous

Well, you passed twice....

Anonymous

=P

Yashas

I did wrote Economics and CS in 2017

after JEE Advanced 2016

I can write in October 2016 and April 2017

Anonymous

But I hope they don't cause trouble during your admission

Yashas

what the hell do I mark now? -_-

Anonymous

2:07 PM

You should have selected 2016

Anonymous

@Yashas You've only one option...

Yashas

lol yeah

Anonymous

Explain them during admission

Anonymous

I hope they will understand

Programmer

2:56 PM

Which is better : Genius in Chem and absolute noob in Physics or Genius in Physics and absolute noob in Chem.

?

Yashas

Genius in all

2

Programmer

5:58 PM

@Yashas Among two of them?

Anonymous

6:13 PM

@Programmer Ugh, that's a silly question to ask. It would be same as asking which is the better subject: Physics or Chemistry? Both are very important subjects and one can't develop without the other.

Anonymous

And btw both Physics and Chemistry at higher levels are intellectually demanding subjects.

Programmer

But I feel chem very easy but not phy

Anonymous

Everything is tough before it's easy. Whining doesn't help.

Programmer

And lets say a person is extremely extremely genious in physics. Should he bother with chem??

Anonymous

Ufff...you are being annoying now.

Anonymous

6:23 PM

I don't know.

Programmer

No... Just joking

Lol

Could you solve the problem?

Anonymous

6:45 PM

@Programmer No, not yet....

Anonymous

I can't find any mistake till now

Anonymous

8:44 PM

Interesting Fact: Almost every alternate year 2 questions from fluids are asked in JEE Advanced Physics. Last year it was not asked so there is a high probability that this year 2-3 questions from fluids might be asked!

Anonymous

11:21 PM

Qualitative Analysis : Revision Day 1

4

Anonymous

Acidic Radicals: (-) vely charged

Anonymous

Basic Radicals: (+) vely charged

Anonymous

1) Weak Group - (dil) HCl or (dil) H2SO4

Anonymous

S S T C N A (Memory Tool: Bhai SST kaam nahi aati ==> Sulphite Sulphide Thiosulphate Carbonate Nitrite Acetate)

Anonymous

2) Strong Group: (conc) H2SO4

Anonymous

11:31 PM

C B I O N F B (Memory Tool: CBI is ON FaceBook!)

Anonymous

Chloride Bromide Iodide Oxalate Nitrate Flouride Borate

Anonymous

3) General Groups :

Anonymous

a) Identified by ppt rkns like SO4(2-) and PO4(3-)

Anonymous

b) Identified by redox reactions like Cr2O7(2-) and MnO4(-)

Anonymous

Solubility Rules :

Anonymous

11:36 PM

1) All salts of group 1 metals are water soluble.

Anonymous

2) All salts of Be Mg (initial from group 2) are water soluble.

Anonymous

3) All nitrates are water soluble.

Anonymous

4) All chlorides are water soluble except PbCl2 (only dissolves in hot water), AgCl, Hg2Cl2.

Anonymous

AgI, PbI2, HgI2, Hg2I2

Anonymous

5) All sulphates are water soluble except PbSO4, HgSO4, Hg2SO4, BaSO4, CaSO4

Anonymous

11:44 PM

6) All carbonates are water insoluble except group 1 metals and ammonium carbonate.

Anonymous

7) All sulphides are water insoluble except group 1, initial members of group 2 and ammonium sulphide

Anonymous

Anonymous

End Of Revision Day 1 (Time Taken: 30 mins)

Anonymous

I think 9 more days would be sufficient for this chapter :)

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