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Thats the same which came to mind too
This was the marking scheme .. for q no. 5 (a)
Reaction (ii)
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s07_ms_4.pdf
Or probably he liked physics or something it shud be Cl2 and UV light .
thanx a lotThe answer is C .
1 is not one of the answers as CO does not react with O2 in atmosphere,all of these reactions which convert CO to CO2 occur in some heated environment like on a catalytic converter so 1 is not the answer.
The other Nitrogen and Sulfur both oxidize in air. Nitrogen easily goes from NO +1/2O2 ---> NO2 while SO2 you may think doesnt form SO3 without the conditions that are present in Contact process but in reality this happens. NO2 + SO2 ---> SO3 + NO . Now this NO again converts back to NO2 by NO +1/2O2 ---> NO2 . You might say that SO2 is not reacting with O2 but it is with NO2 but NO2 is a catalyst here and so in reality u can say it reacts with the O2 provided by NO2 . Theres another way u cud answer this without even caring abt whether option 3 is correct is by finding that 1 is wrong so 2 and 3 is the answer which corresponds to C.
For this question again you need to prove option 1 wrong and then you have your answer. You have 1 mole of a monomer which has 6.02*10^23 particles now lets assume we polymerise these monomers and form a polymer will the polymer also be 1 mole meaning will it also have those 6.02*10^23 particles. the answer quite clearly is no because polymer is large and if u start with 1 mole of monomer you will never form 1 mole of polymers but a fraction of this. In reality you will form 1/(6.02*10^23) moles of polymer. this is option 3 and so it is correct. Once again dont wait to find if option 2 is correct since you know that 1 is wrong tick C because there is not anyway to have 3 in answer without having option 1 .
Please feel free to ask any problem regarding these explanations .
link?
Thank you so much
I'll give the questions a try , hopefully something turns out correct hehe
hahha best of luck (Y)Thank you so much
http://www.sheir.org/a-level-chemistry-51-nov2011.pdflink?
no no u just have to take log for the rate of reaction!http://www.sheir.org/a-level-chemistry-51-nov2011.pdf
yeah so heres the link....Q2b,the graph part,
editing to my prev question would say that log(rate of reaction) is taken n the values r neg ....waot abt the reciprocal of AT,should i take log of that as well,
see if u can help
thanx 4 the quick response dear....i'll plot n see if i got further doubts
okay sure. npthanx 4 the quick response dear....i'll plot n see if i got further doubts
well,im kinda gettin the intercept at x....m i doin it right,n then im completely messing up wid finding the slope....(i know,not so hard of a question,been long since i last attempted a graph question,kinda forgettingokay sure. np
)...pls see through
ooh okay
for reaction 1:
use molar gas volume to calculate the no of moles of Oxygen.
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