Physics, Chemistry and Biology: Post your doubts here!

[Manobilly]

I am stressed out so i get numerical values wrong! lol

Hahahaha its k ,that happens.

 

[Manobilly]

wait isnt terylene is a polyester of the ester monomer which is formed between ethane 1,2 diol and benzene di carboxylic acid?

Yes thats what I wrote

 

[Manobilly]

yes for an

do v need 2 learn dis thing 4 2morrow?

Yes for any eventuality

 

[imperial]

Terelyne is an ester ,it is formed by reaction between ethane 1 ,2 diol and benzene di carboxylic acid.

you wrote ester, and probably they would not accept it (that if a similar question came, very slim chance)

 

[Moi]

God I'm stressed/tired/sleepy/angry/full of hatered.... I can't take it anymore, didn't finish but whatever, i finished the important topics.. GoodNight Peopel and GOOD LUCK FOR TOMORROW !!!

 

[Manobilly]

Oh sorry it has a link of ester.

 

[AAnsarii]

i need help in esters in general
so here some questions:
draw me a simple ester (dont use same carbon number in alcohol and acid, like ethyl ethanoate, or propyl propanoate)
what is hydrolysis of esters?
any other reactions?

need a HELP ASAP IN ESTERS PLEASE

when a Carbox.acid n alcohol react, dey give ester n water. so when u add watr(in presence of an alkali), u should get C.acid n alcohol, ryt?

 

[AAnsarii]

Terelyne is an ester ,it is formed by reaction between ethane 1 ,2 diol and benzene di carboxylic acid.

can u draw it 4 xplaination plz?
thx

 

[Manobilly]

When You add ester to water ,you get an carboxylic acid+ Ethanol.

 

[Maz]

I don't think we have to know all those details about terylene.

 

[AAnsarii]

When You add ester to water ,you get an carboxylic acid+ Ethanol.

yup, in presence of acid or alkali

 

[AAnsarii]

I don't think we have to know all those details about terylene.

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s07_qp_3.pdf
7(b)they say draw terylene
plz xplain...thx

 

[Maz]

can u draw it 4 xplaination plz?
thx

-co-[]-co-o-{}-o-co-[]-co-o-{}-o-

 

[Maz]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s07_qp_3.pdf
7(b)they say draw terylene
plz xplain...thx

I meant except the drawing part.

 

[Maz]

Just make sure to note that there is a double bond between c and o (i forgot to make it).

 

[uzair2013]

Some one help me out...what are the effects of Ozone in the lower atmosphere apart from cancer????

 

[AAnsarii]

-co-[]-co-o-{}-o-co-[]-co-o-{}-o-

jazakallah, so dis is just a polyester?

 

[Maz]

Some one help me out...what are the effects of Ozone in the lower atmosphere apart from cancer????

Ozone causes cancer? that's the first i have heard of it.

 

[AAnsarii]

Some one help me out...what are the effects of Ozone in the lower atmosphere apart from cancer????

Tropospheric ozone is a greenhouse gas and initiates the chemical removal of methane and other hydrocarbons from the atmosphere. Thus, its concentration affects how long these compounds remain in the air.http://en.wikipedia.org/wiki/Tropospheric_ozone

 

[thats_me]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s07_qp_3.pdf
7(b)they say draw terylene
plz xplain...thx