paper 12 chemistry ...

[Prince III]

it didnt ask about harmful gases. just what was more in the exhaust.

It asked which one is most harmful

 

[Henry930821]

it was nitrogen

yeap it's in the past year's

 

[BILALrox01]

http://en.wikipedia.org/wiki/Exhaust_gas

 

[Ali23]

in emission hydrocarbon has been burnt ...it doesnt depend upon dat 73% nitrogen in air ...LOL

 

[BILALrox01]

yeap it's in the past year's

yeah its repeated

 

[Henry930821]

yeah its repeated

exactly. nitrogen is the ans.

 

[BILALrox01]

in emission hydrocarbon has been burnt ...it doesnt depend upon dat 73% nitrogen in air ...LOL

haha check the wikipedia link

 

[Prince III]

Okay then I guess it was Nitrogen didn't read the question properly

 

[Ali23]

dat harmful or not harmful one questn is an another one....whch is Hydrogen..A

 

[BILALrox01]

sooo the coniine ans? NH3 wid X to give coniine and 2HBr

 

[creative22]

can anyone remember abt da HBr react with halogeno alkane??? i got B??

What was the question Number Please tell me

 

[Ali23]

@bilal dun remember bro

 

[BILALrox01]

What was the question Number Please tell me

it was above the cracking question. with the 3 possible products

 

[Ali23]

hey one questn is tht...it doesnot decolourises aq bromine...i go with ethene...anyone remember??

 

[oldfashionedgirl]

Ash the percentage of mass one is 50% 50%...both

yeah, it was equal

 

[BILALrox01]

hey one questn is tht...it doesnot decolourises aq bromine...i go with ethene...anyone remember??

ethene does decolourise

 

[Ali23]

yea but question is 2 thngs r given abt tht X....n told tht X cant decolorise aq br2...so Ethene

 

[BILALrox01]

yea but question is 2 thngs r given abt tht X....n told tht X cant decolorise aq br2...so Ethene

cant or can? cuz ethene is an alkene and alkenes Do decolourise Br2

 

[Ali23]

wb dat HCl n Hbr one....bond energy...bond length increses n ploarity increses...in last 30 to 40 qs

 

[Ali23]

@bilil it was written CANT....