Biology; Chemistry; Physics: Post your doubts here!

[a.abid]

Glad to help

Ty

 

[Spidey21]

Definiton of Soap : Soap is a salt of a fatty acid!!
My chem teacher says that only definition is importanT!!

 

[syed1995]

Definiton of Soap : Soap is a salt of a fatty acid!!
My chem teacher says that only definition is importanT!!

whaat .. soups are acidic ?!? :O

Could someone get me some notes on Macromolecules ??

 

[Spidey21]

whaat .. soups are acidic ?!? :O

Could someone get me some notes on Macromolecules ??

soaps ...:|

 

[malay]

whaat .. soups are acidic ?!? :O

Could someone get me some notes on Macromolecules ??

about soaps no they r basic!
for notes check this
http://sites.google.com/site/urbang...rganic-chemistry#TOC-Synthetic-Macromolecules
hope it helps...

 

[malay]

3 Which reagent could be used to distinguish between dilute nitric acid and dilute hydrochloric
acid?
A aqueous barium chloride
B aqueous silver nitrate
C aqueous sodium hydroxide
D copper(II) carbonate
with reason...

 

[Maz]

3 Which reagent could be used to distinguish between dilute nitric acid and dilute hydrochloric
acid?
A aqueous barium chloride
B aqueous silver nitrate
C aqueous sodium hydroxide
D copper(II) carbonate
with reason...

I am not sure but i think it would be silver nitrate which would cause a white ppt to be formed with HCl(test of chlorine)but not with HNO3.

 

[syed1995]

3 Which reagent could be used to distinguish between dilute nitric acid and dilute hydrochloric
acid?
A aqueous barium chloride
B aqueous silver nitrate
C aqueous sodium hydroxide
D copper(II) carbonate
with reason...

Silver Nitrate.
White PPT with HCL.

 

[malay]

Silver Nitrate.
White PPT with HCL.

I am not sure but i think it would be silver nitrate which would cause a white ppt to be formed with HCl(test of chlorine)but not with HNO3.

thaanxx....

 

[syed1995]

about soaps no they r basic!
for notes check this
http://sites.google.com/site/urbang...rganic-chemistry#TOC-Synthetic-Macromolecules
hope it helps...

Thanks alot mate!!!

 

[Areeba Khan]

for chem paper 1 nd 2.........do we have 2 learn melting nd bolilng points?

 

[Rimsa]

what does the positive (+) sign mean in the label '+3V' on a voltmeter case?

 

[malay]

Thanks alot mate!!!

no prob

 

[malay]

for chem paper 1 nd 2.........do we have 2 learn melting nd bolilng points?

if u can den go ahead..why not?!

 

[Areeba Khan]

lol nah i mean is it neccessary ? cux im nt good at memmorizing thngs ?

 

[malay]

lol nah i mean is it neccessary ? cux im nt good at memmorizing thngs ?

nope its not at all necessary they usually ask to estimate boiling points of certain substances when others are already given...

 

[Areeba Khan]

nd hw can we deduce? dese kinda ques i always gt dm wrong :/

 

[malay]

Q/9
http://www.xtremepapers.com/papers/...al O Level/Chemistry (5070)/5070_w09_qp_1.pdf
how come the answer is D?

 

[malay]

well... herez wat i do
1-find the difference between values given
2-apply number sequence rules make a guess
i cant explain it any further without a question...

 

[Areeba Khan]

oh ok ill try dat thnkss