• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Physics, Chemistry and Biology: Post your doubts here!

Messages
232
Reaction score
103
Points
38
Please Help
question num 8-b please some one tell how to draw and where please :(
question num- 11 b c and d
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w05_qp_3.pdf
8b is parallel plate n the direction is positive to neg !
11b connect DC current over the plates ( I hope u know wht plates I am talking about !)
then pput the source in a box with a slit and keep an counter in the oppside and move the counter and take readings
11 c away from the neg plate n toward the positive plate
11 d because beta has neg charge .... so moves away from neg terminal but towards pos terminal (plate)
 
Messages
232
Reaction score
103
Points
38
Messages
232
Reaction score
103
Points
38
n
I'm doing chemistry p3 .. and why are the markschemes so sensitive ? like there is this question that why is aluminium used in cables .. so it can also be bcz aluminium has a high melting point right ? but the markscheme dosent say that :eek:_O Why's that ??
o yaar bcuz aluminium is less dense
 
Messages
232
Reaction score
103
Points
38
HOW TO BURN THE FUEL JUST BY DISSOLVING IN WATER N HEATING?
LOOOOLLL noooo

take the fuel in the spirit burner
take water in the beaker !
put beaker on retort stand !! n put burner under it ... then do the steps I saide b4
 
Messages
137
Reaction score
29
Points
28
guysssssss HELP !!!:cry::cry:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_qp_63.pdf

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_ms_63.pdf

Q 2 e) why in the mark scheme its written "fizzing/bubbles" from where did the bubbles and fizzing come???????

and more thing....

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s05_qp_6.pdf

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s05_ms_6.pdf

in june o5 p6 Q 5 e) the answer is Copper (II) ions present but how is that and the observation is GREEN solution then he said in the observation dark blue solution so in answer i wrote "contains iron 2+ ions and copper 2+ions......but the mark scheme said only "Copper (II) ions present" WHYYYYYYY????????????????????

PLZZZZZ HELP HELP
 
Messages
37
Reaction score
16
Points
18
Hi. I've got a question in Chemistry ; Extraction of Aluminium.
Cryolite is added to Aluminium Oxide to reduce it's melting point, right? So what is the new melting point?
 
Messages
232
Reaction score
103
Points
38
guysssssss HELP !!!:cry::cry:
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_qp_63.pdf

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s11_ms_63.pdf

Q 2 e) why in the mark scheme its written "fizzing/bubbles" from where did the bubbles and fizzing come???????

and more thing....

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s05_qp_6.pdf

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s05_ms_6.pdf

in june o5 p6 Q 5 e) the answer is Copper (II) ions present but how is that and the observation is GREEN solution then he said in the observation dark blue solution so in answer i wrote "contains iron 2+ ions and copper 2+ions......but the mark scheme said only "Copper (II) ions present" WHYYYYYYY????????????????????

PLZZZZZ HELP HELP
first one .. leave the fizzing thing ! write solid deposits (red-brown colour)
n colour change from blue to colourless
...

dude the thing is that when we added aq. amoonia it turned blue .. so what was present ... cu2+ only right ....
 
Messages
137
Reaction score
29
Points
28
first one .. leave the fizzing thing ! write solid deposits (red-brown colour)
n colour change from blue to colourless
...

dude the thing is that when we added aq. amoonia it turned blue .. so what was present ... cu2+ only right ....

thanks:)
 
Messages
637
Reaction score
365
Points
73
thank you soo much dear but still i have some doubt! in question 1 (c) the height is 12 i think :/ thn 0.5*12*5...pls make it clear ;/
and alpha can go left and righ also right or only into the paper? and which hand rule will we have to use?

noo, is 10.5 or 10.6 something, look clearly o_O
into the paper because its weak, beta goes left n right or smthng .. i dunno the rule =\
 
Messages
637
Reaction score
365
Points
73
Anybody having good notes of polymerisation ?? i see all the p3's of chem have questions frm polymers =\
 
Top