Physics, Chemistry and Biology: Post your doubts here!

[Phoenix Blood]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry
(0620)/0620_w07_qp_1.pdf
question
11 HUH? dont get the question
18 why not A
21 dont get wat exactly theyu are asking
29 ALL ALLOYS CONDUCT ELECTRICITY NEVR NEW -_________-


Phoenix Blood thnx

11) B
In combustion, each hydrogen atom requires only a quarter of an oxygen molecule. In B, the
6 carbons require 6 molecules of oxygen: the 10 hydrogens require 10/4 molecules less the half molecule
already present. Thus the answer is (6 + 10/4 – 1/2) = 8.

18) Copper does not react with dilute sulphuric acid, hence won't form copper(II)sulphate.

21) C
A solution contains both copper(II) sulphate and sodium chloride. When some of the solution is put into aqueous barium chloride, a
blue precipitate is observed. When some of the solution is put into aqueous silver nitrate , a white precipitate is observed. Does this hold true for each case?
So, the copper(II) sulphate and sodium chloride show no change in aqueous barium chloride, no no blue ppt. will be observed.
However, in aqueous silver nitrate, the chloride ions from sodium chloride will show a white ppt..

29) An alloy is a mixture or solid solution composed of a metal and another element. Because all metals conduct electricity, the property goes for all alloys as well.

 

[My Name]

11) B
In combustion, each hydrogen atom requires only a quarter of an oxygen molecule. In B, the
6 carbons require 6 molecules of oxygen: the 10 hydrogens require 10/4 molecules less the half molecule
already present. Thus the answer is (6 + 10/4 – 1/2) = 8.

18) Copper does not react with dilute sulphuric acid, hence won't form copper(II)sulphate....oops i forgot

21) C
A solution contains both copper(II) sulphate and sodium chloride. When some of the solution is put into aqueous barium chloride, a
blue precipitate is observed. When some of the solution is put into aqueous silver nitrate , a white precipitate is observed. Does this hold true for each case?
So, the copper(II) sulphate and sodium chloride show no change in aqueous barium chloride, no no blue ppt. will be observed.
However, in aqueous silver nitrate, the chloride ions from sodium chloride will show a white ppt..

29) An alloy is a mixture or solid solution composed of a metal and another element. Because all metals conduct electricity, the property goes for all alloys as well.okie i just wasnot sure

 

[Phoenix Blood]

What's this quotation supposed to mean?

 

[My Name]

What's this quotation supposed to mean?

my thing is in orange

 

[Phoenix Blood]

Does what hold true for each case? Do your qualitative analysis sheet well. Those you find at the back of a paper 5 question paper.

 

[My Name]

Does what hold true for each case? Do your qualitative analysis sheet well. Those you find at the back of a paper 5 question paper.

yeah

 

[My Name]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s03_qp_3.pdf
last question first part
guiger millre ?

 

[DarkEclipse]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s03_qp_3.pdf
last question first part
guiger millre ?

Yeah, just draw a GM tube.

 

[My Name]

Yeah, just draw a GM tube.

can u answr this to
that after \drawing gm tube
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s03_ms_1 2 3 5 6.pdf
it says in ms
source and detector and labels so
detector gm tube
and the source will b e one point right ?
and absorbers papre/cardboard

plz and thanku

 

[Mai(M4!)]

Hey Guys if you took B in one component are you gonna get B as an overall grade or what???

 

[Mai(M4!)]

would u remark all components if u got an overall grade of B???

 

[Phoenix Blood]

can u answr this to
that after \drawing gm tube
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s03_ms_1 2 3 5 6.pdf
it says in ms
source and detector and labels so
detector gm tube
and the source will b e one point right ?
and absorbers papre/cardboard

plz and thanku

Yeah and yeah.

 

[My Name]

a few silly n short doubts Phoenix Blood
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w03_ms_1 2 3 5 6.pdf

question 3 part a

is it necessary to fill the lines

question 11 I think part c is actually the answer of part b i

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w04_ms_3.pdf

question 1 part why 2 mark

 

[Phoenix Blood]

a few silly n short doubts Phoenix Blood
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w03_ms_1 2 3 5 6.pdf

question 3 part a

is it necessary to fill the lines

question 11 I think part c is actually the answer of part b i

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w04_ms_3.pdf

question 1 part why 2 mark

Upload the question papers.

 

[My Name]

Upload the question papers.

just rite qp insteda of ms

 

[Phoenix Blood]

a few silly n short doubts Phoenix Blood
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w03_ms_1 2 3 5 6.pdf

question 3 part a

is it necessary to fill the lines

question 11 I think part c is actually the answer of part b i

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w04_ms_3.pdf

question 1 part why 2 mark

3,a, One mark will be for the position. Not necessary to fill the lines, but for the other mark, talk a little about the position or how you came to it.

There isn't any question c in the paper. http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w03_qp_3.pdf
The answer for b,i and b,ii match

 

[My Name]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s10_qp_61.pdf
light question plz

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_61.pdf
question 1 can u xplain wat exactly si triangle method??for gradient
question 3 c
question 4 light question paert a i
I HATE LIGHT QUESTIONS

 

[My Name]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_qp_61.pdf
question 2 last part it ll be above the original graph
question 6 last part

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w11_qp_61.pdf
question 2 part c ii
question 4 part g

Phoenix Blood

 

[Phoenix Blood]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s10_qp_61.pdf
light question plz

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_61.pdf
question 1 can u xplain wat exactly si triangle method??for gradient
question 3 c
question 4 light question paert a i
I HATE LIGHT QUESTIONS

I hope you can understand this :/
you just substitute and write your derivation in part (iv) and (v).

In the next paper, you don't have to use the gradient method
but the gradient method anyway is like:

• The vertical distance between (0, 0) and (70, 98) is 98.
  
  
• The horizontal distance between (0, 0) and (70, 98) is 70.
  
  
• 98 ÷ 70 = 1.4

So the gradient here will be 1.4, i.e, vertical distance/ horizontal distance.

3)c) statement: no
justification: within limits of experimental accuracy (always use this statement ), l increases V decreases, say this by by reference to results.

4)a)i) just like i marked the pins on the previous diagram.

My Name, i doubt you will even see this

 

[Phoenix Blood]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_qp_61.pdf
question 2 last part it ll be above the original graph
question 6 last part

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_w11_qp_61.pdf
question 2 part c ii
question 4 part g

Phoenix Blood

2, last part) sketch straight line to the LEFT of the original
6, last part) 5 cm3, just see on the graph.

2, c, ii) read the graph!!
4, g)
) temperature changes would be same/faster/owtte (1) metal in excess (1)/
temperature changes would be greater (1) lower volume (1)