Biology; Chemistry; Physics: Post your doubts here!

[Anon]

Also,

I need help here:

 

[sweet fairy]

i can't exactly go and buy them right now. -_-''
besides the book shop didnt have them.... :|

 

[SalmanPakRocks]

Answer is D.
Sulphur's Oxidation number has increased from 0 to +6

 

[Anon]

THats bad...

I am not gonna appear in BIO Atp, so dont know much,
but topics would naturally be mashed up in a single question..

And as you havent done many topics, GO for textbooks....

P.S: I hold no responsibility of the result of following this stupid advice.

 

[Anon]

How do you calculate?

 

[SalmanPakRocks]

How do you calculate?

Oxidation number??
well there are some rules! We just follow them and then we can calculate oxidation number.

 

[Anon]

Care to explain those "rules"

EDIT: Remember, I am bad at it..
EDIT#2: Also Remember I have exam tomorrow....

 

[SalmanPakRocks]

Ok well these are long but here goes
1) the oxidation number of an element is always 0 e.g: Cl^2, O^2 etc.
2) The sum of any compound has an oxidation state of 0 i.e: H^2SO^4 = 0
3) Hydrogen, Oxygen, 1st group, 7th group have fixed oxidation no. i.e: +2,-2,+1,-1

 

[Anon]

Can you please apply these rules to the question.... how you got 6?

 

[SalmanPakRocks]

Care to explain those "rules"

EDIT: Remember, I am bad at it..
EDIT#2: Also Remember I have exam tomorrow....

Learning those rules won't help u! Doing practice will. Solve past papers of Redox.

 

[Anon]

I still didnt understand how you solved this question by these rules..

 

[SalmanPakRocks]

Can you please apply these rules to the question.... how you got 6?

ok so this was the question
SO^2 + Br^2 + 2 H^2 O = H^2 S O^4 + 2 H BR
so like i said
SO^2 = 0
Br^2 = 0
2 H^2 0 = +2 (H) -2 (O)

Then
H^2 = +2
S = x
O^4 = -8 (-2x4)
so we make this equation, +2 +x -8 = 0 (solve it u will get 6)
remember the increase in oxidation no. is oxidising.

 

[sweet fairy]

i know how to solve this question as well but u have to be actually there to explain it!
why dont u look up some vids (if there r any) related to this topic?
its oxidation n reduction right?

 

[SalmanPakRocks]

i know how to solve this question as well but u have to be actually there to explain it!
why dont u look up some vids (if there r any) related to this topic?
its oxidation n reduction right?

yes its redox i.e Oxidation and reduction.

 

[Anon]

Thanks Salman,
I got it !!!

just confirming:
H always have +1
Oxygen always have -2

and Np, rucking Fetard..

Also Another question is on its way..

 

[Anon]

Ok, Actually I got that question.

 

[SalmanPakRocks]

Thanks Salman,
I got it !!!

just confirming:
H always have +1
Oxygen always have -2

and Np, rucking Fetard..

Also Another question is on its way..

no H has +2

 

[SalmanPakRocks]

Thanks Salman,
I got it !!!

just confirming:
H always have +1
Oxygen always have -2

and Np, rucking Fetard..

Also Another question is on its way..

yes sure! waiting for it! :twisted:

 

[Anon]

I said, I got that question...
was making a silly mistake,

You said,
H^2=2

So H= +1

??

 

[SalmanPakRocks]

no H^2 = 0
Hbr has H (+2)