Chemistry: Post your doubts here!

[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

 

[kitkat <3 :P]

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

ohh got it :") thank u

 

[♣♠ Magnanimous ♣♠]

kya tumne vo figure dekhi? ._______.

ohh got it :") thank u

 

[omaaaar]

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

Thanks man this seems helpful

 

[kitkat <3 :P]

kya tumne vo figure dekhi? ._______.

mai bhool gyi :/

 

[_Ahmad]

then it would be 100K MORE

by Suchal Riaz

Q31
you must be having problem why (3) is wrong. actually the T in the equation is in kelvin. so the temperature does not double but actually increase by 25. so it is wrong. to double it the temperature must double means 2X(273+25=596K=323°C
All others are correct. 2) statement is correct because density is proportional to n/V and rearranging equation we get n/v = p/(RT) which shows inverse relation.

 

[kitkat <3 :P]

by Suchal Riaz

Q31
you must be having problem why (3) is wrong. actually the T in the equation is in kelvin. so the temperature does not double but actually increase by 25. so it is wrong. to double it the temperature must double means 2X(273+25=596K=323°C
All others are correct. 2) statement is correct because density is proportional to n/V and rearranging equation we get n/v = p/(RT) which shows inverse relation.

got it

 

[_Ahmad]

View attachment 45191
Y NOT C

check this
https://www.xtremepapers.com/commun...st-your-doubts-here.9859/page-511#post-826539

 

[princessnoor]

What i am doing is finidnt the pressure of the gas in flask X in Joined
and the presuure of gas in flask Y when joined
they both apply pressure in the final volumne

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s13_qp_11.pdf
in Qs 32 i dont get 3rd statement
and QS 11

 

[princessnoor]

th

Login off now. Its 1 am here.

All the best to you guys for the paper!

thnx

 

[ashcull14]

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

chiral carbon has all different groups attached to it at all 4 sides ...condition is that this carbon should have four branches around it..presence of a double bond isnt counted and all the groups shall be different from each other..e.g....CH(OH)CH3CN...is chiral ....all 4 groups attached to the mid carbon are different

 

[ashcull14]

check this
https://www.xtremepapers.com/commun...st-your-doubts-here.9859/page-511#post-826539

thnks a lot

 

[huh]

PLEASE HELP GUYS, I STUDIED POORLY. WHAT SHOULD I REVISE. I NEED AT LEAST AN A GRADE. HELP!!!!

 

[ashcull14]

maybe im in a hurry donno wht im doing.. cn smone plx solve

 

[kitkat <3 :P]

PLEASE HELP GUYS, I STUDIED POORLY. WHAT SHOULD I REVISE. I NEED AT LEAST AN A GRADE. HELP!!!!

this makes the two of us