Chemistry: Post your doubts here!

[ZaqZainab]

ask ZaqZainab

Hehehe IDK

 

[Kamihus]

bcx C has same hexagonal rings attached to it so not chiral

It is chiral that's what I'm asking

 

[ZaqZainab]

ZaqZainab please donot deny my request I am a teacherless student

Chill out bro i don't even know if i will pass my AS maybe i will be still doing my AS next year and if i succeed
I surely will help if i know how to

 

[Kamihus]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_12.pdf can someone please help with q23?

Half is C2H4 and 1/4 is CH4 and 1/4 is C3H6. 2:1:1 ratio.
Multiply ethene by 2 and then add all.

 

[ZaqZainab]

ask ZaqZainab

What C

 

[ashcull14]

It is chiral that's what I'm asking

so so sorry...ddnt read ure que prprly....actually the structure is different if u luk at it closely...OH grup position is dffrnt

 

[♣♠ Magnanimous ♣♠]

Hu 30 min ma suwa jau chhu

me too

 

[ZaqZainab]

HOW?

Listen if it has HIGH ionisation energry it mean it DOESNOT give off electrons easily and there will be less electrons in the lattice and if less electrons the pull wont be that grea and so the melting point will be low easy to melt

 

[♣♠ Magnanimous ♣♠]

can someone explain me the concept of chiral centre please

 

[Kamihus]

can someone explain me the concept of chiral centre please

Four different groups attached to the C atom. If double bond or CH2 then obviously not chiral.
CH3CH(OH)CH2CH3 is chiral as the second carbon has H, OH, CH3 and C2H5 attached to it.

 

[Haya Ahmed]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w04_qp_1.pdf

Q20 pls

 

[Kamihus]

so so sorry...ddnt read ure que prprly....actually the structure is different if u luk at it closely...OH grup position is dffrnt

If they are attached at different side but are same, not chiral, right?

 

[♣♠ Magnanimous ♣♠]

Four different groups attached to the C atom. If double bond or CH2 then obviously not chiral.
CH3CH(OH)CH2CH3 is chiral as the second carbon has H, OH, CH3 and C2H5 attached to it.

than what was your probs in doubt?

 

[Kamihus]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w04_qp_1.pdf

Q20 pls

Br2 behaves as an electrophile as it has induced dipole-dipole forces when in electrophilic addition reaction with an alkene.

 

[Kamihus]

than what was your probs in doubt?

Ring and OH were same but still not chiral.

 

[Rockstar RK]

Listen if it has HIGH ionisation energry it mean it DOESNOT give off electrons easily and there will be less electrons in the lattice and if less electrons the pull wont be that grea and so the melting point will be low easy to melt

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s07_qp_1.pdf
Q9 please

 

[♣♠ Magnanimous ♣♠]

Br2 behaves as an electrophile as it has induced dipole-dipole forces when in electrophilic addition reaction with an alkene.

you are right

 

[♣♠ Magnanimous ♣♠]

Ring and OH were same but still not chiral.

hey i saw that there is diff in rings OH which means it make it chiral right?

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w04_qp_1.pdf
Also in this Q21, why not C?

C has a chiral center
look at those rings there are diffrent

 

[ahmed faraz]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w10_qp_12.pdf Q30 Ans is D? ???/