Biology; Chemistry; Physics: Post your doubts here!

[asd]

Dehydration

Fermentation
Hydrogenation
Hydrolysis
Hydration
Cracking
Addition
Substitution
Esterification
Polymerisation
Fractional Distillation of Crude Oil


Did i missed anything? which is in organic.. now tell me which catalyst is used for each if there is used any.

 

[syed1995]

dude .. arent the hydrogen ions supposed to be gathered round the cathode ??

H+ will be given off at the cathode .. and it will evolve, causing the OH- to change the color of the litmus solution blue.

 

[Ahmedfj]

H+ will be given off at the cathode .. and it will evolve, causing the OH- to change the color of the litmus solution blue.

thanx a lot dude ... any tips on balancing equations ??

 

[syed1995]

thanx a lot dude ... any tips on balancing equations ??

write the number of each atom at the bottom of both reactants and products .. it might take a little time but your equations will be right.

H2 + 02 = H2O

Reactants ------------ Products
H - 2 ------------ H=2
O - 2 ------------ O=1


so you will change H2 to 2H2 to balance it.

and make the equation 2H2 + O2 > 2H20

Reactants ------------ Products
H - 4 ------------ H=4
O - 2 ------------ O=2

 

[Spidey21]

dude .. arent the hydrogen ions supposed to be gathered round the cathode ??

hydrogen ions at the cathode
HYDROXIDE ions (OH)-1
gather around the anode...remember just gather around and not discharge!

 

[asd]

hydrogen ions at the cathode
HYDROXIDE ions (OH)-1
gather around the anode...remember just gather around and not discharge!

Bu tthe question says around the cathode

 

[syed1995]

hydrogen ions at the cathode
HYDROXIDE ions (OH)-1
gather around the anode...remember just gather around and not discharge!

I hate NaCl, it causes all my concepts to go in the gutter when it comes to electrolysis.

 

[asd]

I hate NaCl, it causes all my concepts to go in the gutter when it comes to electrolysis.

NaCl is always concentrated when it comes to electrolysis. ALWAYS. Even if they mention only aqueous. UNLESS they say its dilute..

 

[Ahmedfj]

NaCl is always concentrated when it comes to electrolysis. ALWAYS. Even if they mention only aqueous. UNLESS they say its dilute..

are u sure ??

 

[Spidey21]

I hate NaCl, it causes all my concepts to go in the gutter when it comes to electrolysis.

true..:|

 

[asd]

are u sure ??

I've been through most of the past papers and it's always concentrated! Even one of the guys here, who i think knows Chem pretty well, says the same. ashiqbal

 

[Spidey21]

Bu tthe question says around the cathode

no its a typo
the solution is electrolysed near the cathode from where the H+ are dischgared leaving behind OH- ions

 

[asd]

But i doubt the answer. Even if its written in Mark scheme. because why would OH ever go to cathodE? it itself is negative!

 

[Spidey21]

But i doubt the answer. Even if its written in Mark scheme. because why would OH ever go to cathodE? it itself is negative!

it doesnot go
its just there in the solution
it just does not travel!!

 

[asd]

it doesnot go
its just there in the solution
it just does not travel!!

Doesn't the OH- ions move towards anode, although they won't discharge but still, they should be attracted towards the anode..

 

[areexrulz]

marchant guess ppR...
JUNE
02 q 9 , 11
03 q 9, 10
04 q 3 , 9 ,11
05 q 2 ,3 ,11
06 q 11
07 q 2, 3, 10
08 q 3, 7. 11

NOV
02 q 1,2,7,9
03 q 3,10
04 q 2,3,10
05 q 1,2,9
06 q 2,3,10
07 q 2,3,4,12

awll the best guysS...

 

[Spidey21]

Doesn't the OH- ions move towards anode, although they won't discharge but still, they should be attracted towards the anode..

i dont know
i dont think so...:|

 

[asd]

marchant guess ppR...
JUNE
02 q 9 , 11
03 q 9, 10
04 q 3 , 9 ,11
05 q 2 ,3 ,11
06 q 11
07 q 2, 3, 10
08 q 3, 7. 11

NOV
02 q 1,2,7,9
03 q 3,10
04 q 2,3,10
05 q 1,2,9
06 q 2,3,10
07 q 2,3,4,12

awll the best guysS...

I got a better guess paper. June 2000-2011 and Same for november.

 

[Spidey21]

I got a better guess paper. June 2000-2011 and Same for november.

how can you say its better?? :|

 

[asd]

how can you say its better?? :|

That big list man, better do'em all!
Why leave a few behind?