Chemistry: Post your doubts here!

[Rockstar RK]

 

[GCE As and a level]

Guys i will eat then i will come back
PlZ join me

 

[♣♠ Magnanimous ♣♠]

C

yeah! i too thought C coz volume is directly proportional to temperature na so if temp doubles than volume will obviously double
kitkat <3 :P why was your answer B?

 

[♣♠ Magnanimous ♣♠]

link please! i will try to solve coz i am not perfect in chem

 

[ZaqZainab]

C

3 is wrong cause we take kelvin ans so
the temperature is not doubled in that case ans so the pressure isnt
1 makes a lot sense why sdid you think it is wrong?

yeah! i too thought C coz volume is directly proportional to temperature na so if temp doubles than volume will obviously double
kitkat <3 :P why was your answer B?

 

[omaaaar]

Thank u
inshallah
But this mark is out of 130 :s not 140 ..... Also i expect a high Gt for P21 cuz there was no much of Organic chemistry
IDK how they calculate it
But plz remember me in ur prayers
Good luck to u
Allah kareem

Ya this time everyone expects a higher gt bcz of the very easy p21
Ya will surely remember u in prayers u too remember me
U too pr

 

[♣♠ Magnanimous ♣♠]

3 is wrong cause we take kelvin ans so
the temperature is not doubled in that case ans so the pressure isnt
1 makes a lot sense why sdid you think it is wrong?

got it thanks

 

[omaaaar]

Guys could u give me a tip on how to locate that whether there is a chiral carbon in any structure because I never understand that

 

[kitkat <3 :P]

yeah! i too thought C coz volume is directly proportional to temperature na so if temp doubles than volume will obviously double
kitkat <3 :P why was your answer B?

i thought they are inversely propotional

 

[♣♠ Magnanimous ♣♠]

i thought they are inversely propotional

are nahi asma! see if you have that orange book i mean new edition wali
than see page 77 observe figure 5.2 and 5.3 you will get

 

[ZaqZainab]

Guys could u give me a tip on how to locate that whether there is a chiral carbon in any structure because I never understand that

remove all the carbons with double bond or CX2 or CX3
X might be H or many be just Cl...
you will be left with very less carbon wont take much time try too expand them and see

 

[♣♠ Magnanimous ♣♠]

Guys could u give me a tip on how to locate that whether there is a chiral carbon in any structure because I never understand that

ZaqZainab help us coz me too don't know about it

 

[ZaqZainab]

i thought they are inversely propotional

If it said 100K to 200K then it would be

 

[♣♠ Magnanimous ♣♠]

remove all the carbons with double bond or CX2 or CX3
X might be H or many be just Cl...
you will be left with very less carbon wont take much time try too expand them and see

gimme an example coz i didn't get anything

 

[kitkat <3 :P]

If i said 100K to 200K then it would be

then it would be 100K MORE

 

[Rockstar RK]

remove all the carbons with double bond or CX2 or CX3
X might be H or many be just Cl...
you will be left with very less carbon wont take much time try too expand them and see

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w13_qp_12.pdf
PLEASE solve Q-25 and Q-26

 

[♣♠ Magnanimous ♣♠]

If it said 100K to 200K then it would be

lol she thought that volume is inversely proportional to temp.. samji zainab.. well i think she is bit confused in some sub

 

[_Ahmad]

Guys could u give me a tip on how to locate that whether there is a chiral carbon in any structure because I never understand that

check this link
http://www.chemguide.co.uk/basicorg/isomerism/optical.html

 

[♣♠ Magnanimous ♣♠]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w13_qp_12.pdf
PLEASE solve Q-25 and Q-26

it's B right? just see na that they are isomers of butan-2-0l simple! calculate the H and C in opt B it is perfect! so answer B

 

[ZaqZainab]

then it would be 100K MORE

if the question had KELVIN inseted of Degree celcius then statement 3 would be correct
Volume IS directly proportional to Temperature
PV=nRT if the moles and pressure stay constant
VαT