Biology; Chemistry; Physics: Post your doubts here!

[flaminheroes]

Can you guy's give me a list of all the tests that are required in Chemistry ATP?

 

[robinhoodmustafa]

Can you guy's give me a list of all the tests that are required in Chemistry ATP?

Oh Yes I have that but let me search for it. u till wait~

 

[ZaqZainab]

answer is d

Calcium Carbonate is a Limiting substance so Its mass in reaction will change but the HCL Volume wont change as it is in excess

but isn't HCl reacting ?

 

[robinhoodmustafa]

but isn't HCl reacting ?

Ofcourse

Moles of Solute never changes so volume of HCL also doesnt

 

[Snowysangel]

K and Na give hardcore explosive reactions.
Calcium has a voilent reaction.
mg and zinc have a moderate reactionm
and iron has a slow reaction.

How will u describe the observation in a 3 mark question. K and na turn red hot because of the great amount of heat produced, they dart rapidly over the surface...what else should we write? How do calcium and iron react?

 

[aiman]

can any one uplaod sir naushad 2013 physics guess paper

 

[HarithAslam]

Ofcourse

Moles of Solute never changes so volume of HCL also doesnt

wait wait.
CaCO3 will decrease in mass-understood
CO2 will increase in mass-understood
HCl-moles will decrease, so won't the volume of HCl decrease too, causing the concentration to remain constant?

 

[Dawarkazi]

Imran Merchant Guess :

Nylon, Terylene , Cracking, Dehydration, Extraction of Iron, Extraction of Iron, Aluminium, Ionic Lattice Drawing, Polypropene (and all others), Fractional distillation of crude oil, Reduction of Metal oxides, Electrolysis, Exothermic , Endothermic. Covalent Molecule Drawing . Dynamic Equilibrium, diamond, graphite, oxides, isomerism Carbon cycle, Pollution.

Funny Guess! Moles to hai hi nai

Don't rely on it , though! Better to do everything !

Dude is it confirmed that this is merchant's geniune guess?
someone else also posted a file which had questions...?

 

[robinhoodmustafa]

Dude is it confirmed that this is merchant's geniune guess?
someone else also posted a file which had questions...?

Dawaar its 1 year old GP

 

[robinhoodmustafa]

flaminheroes

Sorry bro! Internet stopped working

 

[flaminheroes]

flaminheroes

Sorry bro! Internet stopped working

upload the image again mate it's broken D:

 

[robinhoodmustafa]

upload the image again mate it's broken D:

http://easycaptures.com/fs/uploaded/627/3978817638.jpg

 

[irfan.kheerdali]

how to learn the qu. on test,observation and conclusion by heart . cations and anions. plzzzzzzzzzzzzzzz helppppppppppp

 

[flaminheroes]

Thankyou may the force be with you for these exams.

 

[Saad Mughal]

Thankyou may the force be with you for these exams.

That quote.

 

[mercedes008]

check the examiner report instead

Prove from marking scheme about NaCl being a special case?

 

[Dawarkazi]

Dawaar its 1 year old GP

oooohh!!

 

[HarithAslam]

please reply to my question, anyone, its on the previous page

 

[AhsanAfzal]

part b. as the size of molecules increases the temperature rise done when it is burned increases or decreases? pls explain

 

[Suchal Riaz]

part b. as the size of molecules increases the temperature rise done when it is burned increases or decreases? pls explain

the more carbon atoms, the more heat in organic compounds of same homologous series.