chem p12...hmm that was a tough one !!!

[EzioAuditre]

we agree wd 1 but 2 choice was sthng i dun remember tht i thought was wrong am not sure lets hope for the best
gt will be at 28 so many cnfusions all tht

 

[Sannikutti]

what about the nitrogen and sulphur oxides

 

[Hateexams93]

GUYS Q2 WAS IT C OR A ?

 

[intel1993]

Does any one remembers the answer of the Q no 31 ...the Q regarding adding water to a reaction...and the Q regarding the X, Y and Z gases(No and So2)....

the answer for q31 was B..........
n answer for that No and so2 question was A............

 

[RiseAgainst]

GUYS Q2 WAS IT C OR A ?

I chose C.

 

[armaghanaqib]

can someone remind me what was Q 31????

 

[Sannikutti]

it was about
acid and water mixed

 

[sakibfaiyaz]

Yea 31 was C or A as far as I remember...option 3 would be true for sure...the acid would be adsorped by the container for sure..Cant remember what option 1 was :S

 

[diwash]

I dont think 3 was Correct in Q 31...it was either 1 or both 1 and 2...

 

[Sannikutti]

look
at this year
the concentration does not affect
the activition energy
nor container surface area i think so
like it is in this past paper
http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf
and option 1 was the collision frequency would have decreased
if the activition energy was different then this woud have been explained by maxwell boltzman disturbution curve
and adsorption would have beeen taken place for the first only reaction so it will not differ because the adsorption constant will remained the same
and plus the adsorption would be more for the first reaction with HCL only with out water because the water molecules can get adsorbed more so lesser reaction probalby i read in wiklipedia and some other websites

 

[alphabravocharlie]

Hey just clarifying, the question is the one about increasing pressure, and options were gas liquefies, absorbed by containers and something else. If so then it was 1 and 2.

 

[tasnim007]

it was D for sure .....cos u react butandioic acid with calcium and see...wat happens .,....there are 4 H not 6 @SANNIKUTTI
TRY it out on ur copy now and u ll seE it was D

hassam I am very sure its D too
thats what I gave
nd i thnk hot acidified KMnO4 does oxidise secondary alcohol
see here http://en.wikipedia.org/wiki/Oxidation_of_primary_alcohols_to_carboxylic_acids
But what was answer to dat NO & SO2.

:wink:

 

[grumpy]

for 40th i am dead right it is D.
FOR BOLTZMANN i think lower higher lower
and no and so2 i dont remember a question
can someone please right the whole question and the options.

 

[tasnim007]

for 40th i am dead right it is D.
FOR BOLTZMANN i think lower higher lower
and no and so2 i dont remember a question
can someone please right the whole question and the options.

I thnk boltzmann higher lower lower
nd NO & SO2 are about dat question X, Y nd Z
pollutant gases that react with (1/2)O2 in atmosphere

 

[junaidaftab]

Question 31: A or B?

 

[sakibfaiyaz]

I think that would be B....as in 1 and 2 are right...but 3 isnt...
NO,NO2 or SO2 arent polar i think

 

[junaidaftab]

What was the exact statement of option B, people?

 

[armaghanaqib]

i wrote B of Q31.....and NO and SO2 are polar...so it was A

 

[tasnim007]

I wrote A
1 & 2 I m sure rite
NO may be slightly polar nd SO2 is polar

 

[EzioAuditre]

for SO2 it was A
Q40 it was D now i realised
for boltzman it was high low low
5 isomers
for pressure question it was B
for pv it was D