CHEMISTRY P12: INCREDIBLE!!!

[hamizahmed]

abay dashon bas karo, kitna discuss kroge paper. Faltu k vacations mat khrab karo apne

 

[WellWIshER]

y cant it be 2 radicals

and da rate inc in both directions or not?

 

[hamizahmed]

and mjhe to apnay ans bhe yad nai hai

 

[beacon_of_light]

rate of reaction always increases whether its endo or exo.......

 

[1992]

did anyone remeber the one of state oxidixing of N. i put it was +6 and -2. is that right??

 

[1992]

is carbon a giant molecular?? i put yes

 

[beacon_of_light]

In NH4NO3, it was -3 and +5 ...while in N2O it was +1 ....so change in oxidation state was +4 and -4

yeah carbon (graphite n diamond have giant molecular structures!

 

[1992]

o shit i have it wrong S:
i think when u burn pvc, it breacks ozone, and not harmful produts. PVC doenst make harmeful product, just looked at a book

 

[1992]

did anyone put P which was phophurus for Q1 whcih was something about unpaired electrons?? i think it was C

 

[Ab.R0xi0uS]

paper went awsom................expecting abv 37.............

n yes sulphuric acid only acting as acid.............as chlorine is stonger oxidising agent...........

n yes neither p and Q was right......

in redox recation question....... D was rite ans ...only in option 1 state changes.............

and in ammonia question.... only backward rate increases...confrmed./......asd it was an exothermic reaction so increase in tempretre shift equlibrium to left.............

last question ans was B................

element X was SR in that chloride question..........

N YES PRopanoic acid synethesized by all three options given so ans A......

in that 2 2 dimethylquestion..(q37) ans was C...........

and the forms of X raduical formed weere 2/////////

first of all
- increscing temp increses both rates dude confrimed .. only the backward rate increases more than forward that y equilirbium shifts
second
-3 radicals where froming !! DAMN SURE !! spend 5 minutes on that question .. got 3 possiblilty

and 3rd
remind me of propanoic acid formation question ?

lastly
i think amongst p and q
Q was rite it was a stronger alkali !! SO THERE WAS MORE DISSASOCIATION !!

 

[ashhadazam]

Huff. Paper finished.. so many different opinions.. I think MCQ paper is the paper where u get least agreement on answers between the students.. lets w8 till 12th august... thn we will have the markscheme our result and much more to see till then haf fun

 

[princesszahra]

mine went awesome alhumdullilah!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

 

[Different]

In NH4NO3, it was -3 and +5 ...while in N2O it was +1 ....so change in oxidation state was +4 and -4

yeah carbon (graphite n diamond have giant molecular structures!

what about sodium chloride????? it has a giant ionic structure so was that a correct option tooo?????

 

[ashhadazam]

well it wasnt.. aas it asked for giant molecular structurE !

 

[NightmarE]

lollz Ashhad ...
NaCl is a molecule as well ...
any subs. that cntains more than 1 atom is called a molecule ...
chk ur class 8's chem buk ...

 

[beacon_of_light]

NaCl is not a molecule but an ionic crystal...well NaCL contains Na+ and Cl- ions not atoms...and the question asked for giant molecular* structure ....not giant ionic lattice...

 

[ashhadazam]

lol !! a pair or more collecollection of atoms is called a molecule.. NaCl exists due to the attraction of oppositely charged ions.. It isnt a molecule :O !!

to clear it up.. Neon isnt a molecule even though in its strucure contains more than one atom.. everything in this world contains more than on atom but dat doesnt mean it is a molecule.. Molecule is a thing made up of more than two atoms. like a hydrogen molecule !!!

 

[princesszahra]

I think majority of the students need to learn about the structures!!!!

 

[ashhadazam]

Agreed.. !

 

[Dr.Ramsamooj]

I also would like to know when the 2010 june paper will be published on xtremepapers. Is there anywhere else i can obtain the june 2010 papers for physics chemistry and biology?