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Chemistry: Post your doubts here!

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924
Reaction score
1,096
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153
It's says B as the answer.
Only B shows a p orbital.

porbital.gif


p orbitals
 
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Only B shows a p orbital.

porbital.gif


p orbitals
Formation of ICl3 (s):

1/2 I2 (s) + 3/2Cl2(g) --> ICl3(s)

2 x Formation of ICl3 (s) :

I2(s) + 3Cl2(g) --> 2ICl3(s)


How to do this?

Easy.

Atomize: I2(s) ---> I2(g) [+38]

React: I2(g) + 3Cl2(g) ---> 2ICl3 (s) [-214]

Total = 38 - 214 = -176kJ

But this was 2 x Formation of ICl3(s)

So divide it by 2. -176/2 = -88kJ/mol
Oxidation number of N in:

NH4+ : -3

NO3- : +5

N2O : +1

So change from NH4+ to N2O is +4

And change from NO3- to N2O is -4
Jazak Allah Khairan

You're a life saver!!!

I still have a few more doubts,If possible can you please solve them............
 
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NO can be oxidised to NO2 in the atmosphere pretty easily. SO2 can also be oxidised to SO3, especially since NO catalyses this reaction.

Unfortunately, CO is quite stable and won't turn into CO2 in the atmosphere. If that was the case, we wouldn't be complaining about CO, since it would be naturally depleted. Only the CO2 produced would be an issue due to global warming.

Oxidation of NO and SO2 to form NO2 and SO3 respectively doesn't solve any problems, since it still forms acid rain and weathers the buildings and destructs aquatic life.
 
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So the 2016 syllabus for AS has somethings moved from A2 to As, namely carbon nanotubes and Buckminsterfullerene, infrared spectroscopy and iodofrom test. I have no where to practice questions from these so could anybody link some A2 papers having questions from these topics. Cheers (y)
 
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So the 2016 syllabus for AS has somethings moved from A2 to As, namely carbon nanotubes and Buckminsterfullerene, infrared spectroscopy and iodofrom test. I have no where to practice questions from these so could anybody link some A2 papers having questions from these topics. Cheers (y)
Iodoform test I think A2 questions should be pretty much similar to the AS ones.
Question 5 of the specimen paper http://papers.gceguide.com/A Levels/Chemistry (9701)/9701_y16_sp_4.pdf includes iodoform test.
Question 9 of http://theallpapers.com/papers/CIE/AS_and_ALevel/Chemistry (9701)/9701_w13_qp_43.pdf includes buckminister fullerene.
 
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CaCO3 and Ca(OH)2 both react with acids. KNO3 is a salt. It is a result of neutralisation, not a reagent.
NO can be oxidised to NO2 in the atmosphere pretty easily. SO2 can also be oxidised to SO3, especially since NO catalyses this reaction.

Unfortunately, CO is quite stable and won't turn into CO2 in the atmosphere. If that was the case, we wouldn't be complaining about CO, since it would be naturally depleted. Only the CO2 produced would be an issue due to global warming.

Oxidation of NO and SO2 to form NO2 and SO3 respectively doesn't solve any problems, since it still forms acid rain and weathers the buildings and destructs aquatic life.


Thanks a bunch.
 
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