Physics, Chemistry and Biology: Post your doubts here!

[suri003]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_s11_qp_62.pdf
guys question 2b....?..... 2mrw i hv exam .....

 

[suri003]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_s11_qp_62.pdf
guys question 2b....?..... 2mrw i hv exam .....

 

[Sudhanshu]

See,
The number of squares covered by leaf is approx. 55.5.
The number of squares covered by that white larva tunnels is approx. 15.
So percent comes out to be 26%

 

[shahdigcse]

I am really confused with colour changes of "potassium manganate(v11)" . I know that it changes to colorless with acids and it is originally purple
But sometimes it changes to pink ,brown or colourless.
Can someone PLZ make it clear to me, & and I will be very thankful.

 

[Kushal lodha 5336]

thank u sooooo much............its reallly helpful...................

 

[Kushal lodha 5336]

thank u sooooo much............its reallly helpful...................

 

[suri003]

thank u sooooo much............its reallly helpful...................

np........

 

[suri003]

See,
The number of squares covered by leaf is approx. 55.5.
The number of squares covered by that white larva tunnels is approx. 15.
So percent comes out to be 26%

thnks ... hopfully there was no question lyk tis today......phew...........

 

[Kdown567]

I am really confused with colour changes of "potassium manganate(v11)" . I know that it changes to colorless with acids and it is originally purple
But sometimes it changes to pink ,brown or colourless.
Can someone PLZ make it clear to me, & and I will be very thankful.

Manganese is oxidised to different states , these different oxidation numbers have different colours , manganese (II) is brown in colour

 

[shahdigcse]

Manganese is oxidised to different states , these different oxidation numbers have different colours , manganese (II) is brown in colour

ohh i see ... what about when it is pink or colourless?!
Thanks for replying

 

[hiyaraja]

hey I need chem atp notes of igcse

 

[Sudhanshu]

Many a times in ATP they ask :
Describe the
appearance of the filtrate.

Please tell me how to determine the colour of the solutiom......​

 

[Tiffygirly]

Chemistry Paper 6,does anyone have like a revision guide for alternative to practical?

 

[suri003]

Chemistry Paper 6,does anyone have like a revision guide for alternative to practical?

https://www.xtremepapers.com/community/attachments/study-quide-0620-pdf.32527/

 

[Tiffygirly]

https://www.xtremepapers.com/community/attachments/study-quide-0620-pdf.32527/

Huh,I'm soooo grateful,thank uuu Good luck in ur exam

 

[suri003]

Huh,I'm soooo grateful,thank uuu Good luck in ur exam

np same to u "_

 

[Kdown567]

Lol done it yet?

 

[Kdown567]

Many a times in ATP they ask :
Describe the
appearance of the filtrate.

Please tell me how to determine the colour of the solutiom......​

Is it in relation to ion tests , and the colours of their precipitates

 

[Alla' Abu-Sultaneh]

how do you solve physics paper 3 Q2 may june 2011 part b?

 

[Kdown567]

V

how do you solve physics paper 3 Q2 may june 2011 part b?

Which variant /31 /32 or /33

 

[Alla' Abu-Sultaneh]

V

Which variant /31 /32 or /33

31