Biology; Chemistry; Physics: Post your doubts here!

[syed1995]

yar i have discussed the paper already and all ansers confirmed so i will not need to use it to confirm ans

tu aap kay 30/30 pakkay ? nice

 

[syed1995]

ok lets start two types of polymers addition(without loss of molecules, high temp and pressure,catalyst) eg teflon(non stick surface of pans, perspex(cars front window) polyethene(plastic bags0 and they are thermosetting plastics so they can be heated and reshaped.

Only one product formed in addition polymerisation, (no water formed)

 

[A star]

Aap hi start kar dijiye wesay ziyada tar kay jawab aap hi ko denay hongay ... btw my Macromolecules and Organic is really really weak .. kaafi training chahiyee unn dono mein .. I don't even remember the name of the Macromolecules in our course! let alone their monomers and linkages!

part two second type of polymers condensation (lose of molcule usually water) thre types amide linkage (nylon and protien) ester linkage (fats lipids and terylene) and ether linkage (poly(ether and carbohydrates) monomers include di amine aicaboxylic acid diol

 

[asd]

Only one product formed in addition polymerisation, (no water formed)

That's right, and important to note that the monomers in addition polymers originally have a double bond, which is then broken as they form polymers.

ok lets start two types of polymers addition(without loss of molecules, high temp and pressure,catalyst) eg teflon(non stick surface of pans, perspex(cars front window) polyethene(plastic bags0 and they are thermosetting plastics so they can be heated and reshaped.

And umm, teflon and perspex not in syllabus

 

[A star]

tu aap kay 30/30 pakkay ? nice

i said confirmed not correct i did one wrong (cant disclose yet)

 

[A star]

That's right, and important to note that the monomers in addition polymers originally have a double bond, which is then broken as they form polymers.
And umm, teflon and perspex not in syllabus

umm there uses are u dont need to remember monomers only uses

 

[asd]

umm there uses are u dont need to remember monomers only uses

not even uses :O Don't scare me man

 

[syed1995]

Let me check which are in our syllabus!!!

 

[A star]

not even uses :O Don't scare me man

yupthey arent but it has come in previous year Q name an addition polymer and use

 

[SilverCrest]

How does flammability in a homologous series increase...?

 

[syed1995]

 

[asd]

Addition polymer is poly(ethene) and it used in making plastics/plastic bags/cling films/etc

yupthey arent but it has come in previous year Q name an addition polymer and use

 

[asd]

How does flammability in a homologous series increase...?

flammability decreases down the series, in alkanes i guess, no?

 

[A star]

How does flammability in a homologous series increase...?

flamability=1/molecular size

 

[syed1995]

How does flammability in a homologous series increase...?

Flamability Decreases as the size of the molecule increases ..

in other words the more the carbon atoms the less flamable the organic compound is ..

 

[daredevil]

How does flammability in a homologous series increase...?

I think it decreases as the molecule size increases. ryt

 

[syed1995]

I think it decreases as the molecule size increases. ryt

Yes

 

[A star]

see the question and tell what would be ans if it asked for thin plate

 

[asd]

see the question and tell what would be ans if it asked for thin plate

B?

 

[ashiqbal]

Expecting full?

29!

Aap hi start kar dijiye wesay ziyada tar kay jawab aap hi ko denay hongay ... btw my Macromolecules and Organic is really really weak .. kaafi training chahiyee unn dono mein .. I don't even remember the name of the Macromolecules in our course! let alone their monomers and linkages!

at least you know what you have to do!