Physics, Chemistry and Biology: Post your doubts here!

[Mackintosh]

no

^^Does anyone have the CD for this?

I am not sure dear coz yet to buy it? does it include something important??

 

[Al-Anoud]

no
I am not sure dear coz yet to but it? does it include something important??

It has the answers to all the questions in the book...

 

[ashutosh rungta]

can somebody plz upload some notes for physics paper 6 0625

 

[ashutosh rungta]

Is transistor required for physics paper 6 (0625)

 

[Mackintosh]

It has the answers to all the questions in the book...

Oh i c thanks for the info girl..when do u have the exam for bio? mayb i can help you

 

[Al-Anoud]

Oh i c thanks for the info girl..when do u have the exam for bio? mayb i can help you

JazakAllah. My exam is over now, Alhamdulilah.
I really appreciate your effort.

 

[Mackintosh]

JazakAllah. My exam is over now, Alhamdulilah.
I really appreciate your effort.

oh! how were the papers?btw where do u reside?

 

[Lanocaster]

You guys reactivity series for cations and anions. Can anyone list it for me,for cations,from least to most reactive,and also for anions. Pleasee,thanks xxx

I cannot list ALL of them but here are a few-
Cations:
All group 1 metals in reverse order (Caesium, Rubidium, ..., Lithum)
All group 2 metals in reverse order (Barium, Strontium, Beryllium)
Aluminium
Carbon (I am not sure, but it is most probably here because it cannot displace aluminium)
Zinc
Iron
Tin
Lead
Copper
Silver
Gold
Platinum

As far as anions are concerned, I just remember that the Halogens are most reactive...the reactivity series for anions is not given in our book, and I don't think that it is very important because it's only required for displacement(do anions even displace each other?) and no question based on this has come in the past papers (AFAIK).

 

[Tiffygirly]

Oh,ok. Thanks all the same. I actually got a mnemonic for it now. For anions,it is SNHCBI( Short Ninjas have Cup but Ice cream),then for Cations,it is PSMAHCS( People sold Magi at a high cost sale) ,but I don't know,maybe it's gonna come out,maybe it doesn't come out,whatever

 

[Tiffygirly]

Oh,it's very important. When they ask,which is released at the Cathode,and you're trying to decide between OH- and let's say Br-,so,the one that is lower at the reactivity series is the one released. It comes like every time.

 

[Lanocaster]

Oh,it's very important. When they ask,which is released at the Cathode,and you're trying to decide between OH- and let's say Br-,so,the one that is lower at the reactivity series is the one released. It comes like every time.

Like I said, I just remember that Halogens are the most reactive. If there is no halogen in the cation, it's going to be the hydroxide ion, but if there IS a halogen then it's gonna be the halogen.
BTW, don't you have Physics tomorrow?

 

[Saket Sekhsaria]

Does Anybody have any solved or classified past papers for Physics or Chemistry ?

 

[_Gowri_]

how do we clamp the ruler to the bench?

 

[Lanocaster]

how do we clamp the ruler to the bench?

Using a clamp?

 

[Lanocaster]

how do we clamp the ruler to the bench?

Using a clamp?

 

[Antonyyabas]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_63.pdf

question 5)c)

 

[_Gowri_]

Using a clamp?

thank you smartass

 

[_Gowri_]

Meaning of 'within the limits of experimental accuracy'?

 

[_Gowri_]

Meaning of 'within the limits of experimental accuracy'?

 

[Lanocaster]

thank you smartass

If you are asking that for p6, then I don't think you need to specify that...