Physics, Chemistry and Biology: Post your doubts here!

[sasuke474]

Is there any logical way to know color of salts or we just have to memorize
Also is there any rule to which salts are soluble or not like based on reactivity or any property of the reactants

 

[GorgeousEyes]

Paper 6 final revision notes anyone ?

 

[Ahmed Al Hilali]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w09_qp_6.pdf
can anyone explain to me : Q4 (e)(ii)&(iii) ?

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_ms_61.pdf
can anyone explain to me : Q5 (e) ?

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w09_qp_12.pdf
Q7 , how do I know that student 2 is correct

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_qp_13.pdf
Q20

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w07_qp_1.pdf
Q11

I know they are too much , solve the one u can plz
2moro is my exam

 

[sasuke474]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w09_qp_6.pdf
can anyone explain to me : Q4 (e)(ii)&(iii) ?

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_ms_61.pdf
can anyone explain to me : Q5 (e) ?

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w09_qp_12.pdf
Q7 , how do I know that student 2 is correct

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_qp_13.pdf
Q20

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w07_qp_1.pdf
Q11

I know they are too much , solve the one u can plz
2moro is my exam

Dude you're so late!!! But thanks for sharing, i hope there's an answer soon because idk either

 

[Mohammed Askari Mujtaba]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w09_qp_6.pdf
can anyone explain to me : Q4 (e)(ii)&(iii) ?

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_ms_61.pdf
can anyone explain to me : Q5 (e) ?

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w09_qp_12.pdf
Q7 , how do I know that student 2 is correct

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_qp_13.pdf
Q20

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w07_qp_1.pdf
Q11

I know they are too much , solve the one u can plz
2moro is my exam

for S11_qp_13: All Nitrate salts are soluble in water, silver chloride is insoluble and so is barium sulfate, so it cannot be A, C or D, hence answer is B
for W09_qp_6: Double the volume, hence reaction time will be longer resulting in temperature change being slower at half the rate, temp change will be half since rate is half

 

[Ahmed Al Hilali]

Dude you're so late!!! But thanks for sharing, i hope there's an answer soon because idk either

i just remembered these questions

 

[Ahmed Al Hilali]

for S11_qp_13: All Nitrate salts are soluble in water, silver chloride is insoluble and so is barium sulfate, so it cannot be A, C or D, hence answer is B
for W09_qp_6: Double the volume, hence reaction time will be longer resulting in temperature change being slower at half the rate, temp change will be half since rate is half

got it
thank you

 

[ZaqZainab]

Do ALL the metals react with Acid to give Hydrogen

 

[mak kings]

cud any1 clear my 2 mcqs plz now....URGENT URGENT!!!
http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Chemistry%20(0620)/0620_w08_qp_1.pdf 4 and 17
http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Chemistry%20(0620)/0620_s08_qp_1.pdf 19

 

[GorgeousEyes]

https://www.xtremepapers.com/community/threads/physics-igcse-paper-6-final-revision-tips.25517/
If you ever need paper 6 final revision notes , that's ur destination

 

[sundas]

Should we extrapolate the graphs for physics alternative to practical?

 

[sundas]

Should we extrapolate graphs for physics in alternative to practical?

 

[Lightning soul]

Should we extrapolate graphs for physics in alternative to practical?

I think they ask it as a question. I don't think you're normally supposed to extrapolate graphs

 

[sasuke474]

Any important tips for phy p6?

 

[Lightning soul]

Any important tips for phy p6?

Focus on practising a lot of past papers. This should be your key revision method

 

[sundas]

are you sure?

 

[Lightning soul]

are you sure?

I'll give you a proper response in about an hour. I would suggest checking the marking schemes for past papers

 

[sundas]

they usually don't mention the extrapolation part!
will be waiting
Thankyou

 

[sundas]

one more question sorry
if they don't specify in the question whether the source is ac or dc then is this how you draw it??
---0 0---

 

[h&yman]

can someone please tell me all the formulas needed for physics atp