Biology; Chemistry; Physics: Post your doubts here!

[asma tareen]

Daadi jaan. Aap bhi na!
Z displaces W.
W displaces X.
X displaces Y.
So, Reactivity is Z>W>X>Y.
Answer is C.

Q 32 co2 ka kya kaam hai

 

[Mohammad Farzanullah]

http://papers.xtremepapers.com/CIE/...l O Level/Chemistry (5070)/5070_w11_qp_12.pdf
i cant understand why is nitrogen the answer to Q1... plz help asap!

 

[Saad Mughal]

Q 32 co2 ka kya kaam hai

Look, simply see that ALUMINIUM is always formed at the CATHODE, and this is only in option C.
Waise, it's true, the oxygen at anode reacts with the anode to form CO2.

 

[asma tareen]

Look, simply see that ALUMINIUM is always formed at the CATHODE, and this is only in option C.
Waise, it's true, the oxygen at anode reacts with the anode to form CO2.

thnx poutey

 

[Mohammad Farzanullah]

yar dadi ya poutey is ka answer to samjhado!

http://papers.xtremepapers.com/CIE/...l O Level/Chemistry (5070)/5070_w11_qp_12.pdf
i cant understand why is nitrogen the answer to Q1... plz help asap!

 

[passion hunter]

http://papers.xtremepapers.com/CIE/...l O Level/Chemistry (5070)/5070_w12_qp_22.pdf......B6 d (ii) please...

 

[asma tareen]

yar dadi ya poutey is ka answer to samjhado!

http://papers.xtremepapers.com/CIE/...l O Level/Chemistry (5070)/5070_w11_qp_12.pdf
i cant understand why is nitrogen the answer to Q1... plz help asap!

i guess due to high percentage ov nitrogen nitrogen also reacts wgich make oxygen impure not sure

 

[ReN0uNeD De\/!|_]

can anyone plzz tell the advantages and disadvantages of polyester and nylon.....

 

[asma tareen]

wx this website locked or what????

 

[Kamihus]

wx this website locked or what????

it was down for about 6-7 hours

 

[robinhoodmustafa]

it was down for about 6-7 hours

wx this website locked or what????

https://www.xtremepapers.com/community/threads/imran-merchant-guess-paper-2013.26876/

 

[TheStallion-Reborn]

http://papers.xtremepapers.com/CIE/...l O Level/Chemistry (5070)/5070_s10_qp_22.pdf someone please help me, these ionic equations are killing me. question B9, part d(i)

 

[asma tareen]

HOW ARE WE GOING TO PURIFY WATER DETAILS PPL???

 

[asma tareen]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_s10_qp_22.pdf someone please help me, these ionic equations are killing me. question B9, part d(i)

AS THE QUESTION SAYS that theyellow ppt can be seen so iodide ions are there and lead ions are the metal ions in the solution so
Pb^2+ (aq)+ 2I^-1=PbI2 i guess

 

[TheStallion-Reborn]

HOW ARE WE GOING TO PURIFY WATER DETAILS PPL???

pass it through gravel to remove any particles..pass it through coal to remove odours an tastes, then add chlorine to remove harmul bacteria

 

[A_1o1]

HOW ARE WE GOING TO PURIFY WATER DETAILS PPL???

http://www.xtremepapers.com/revision/gcse/chemistry/air_and_water.php

This explains clearly and with proper details

 

[Snowysangel]

Can someone post all the formulae in physics?

 

[Snowysangel]

How would u define uniform acceleration? It's when a body gains the same velocity in every second...? And Jon-uniform acceptation too

 

[Saad Mughal]

How would u define uniform acceleration? It's when a body gains the same velocity in every second...? And Jon-uniform acceptation too

Uniform acceleration. A uniform/constant increase in velocity per unit time. Yes.
Jon-uniform acceptation? I'm sorry, that's not part of the syllabus.

 

[Snowysangel]

Uniform acceleration. A uniform/constant increase in velocity per unit time. Yes.
Jon-uniform acceptation? I'm sorry, that's not part of the syllabus.

Yeah I meant non-uniform acceleration x_x