Biology; Chemistry; Physics: Post your doubts here!

[falcon678]

guyz wich gas is releasd whn NO3- is electrolysed...???

 

[A star]

What is the difference between the structure of fats and terylene?

ones natural others synthetic

 

[A star]

guyz wich gas is releasd whn NO3- is electrolysed...???

no

 

[A star]

a.abid ur help neede by others

 

[daredevil]

guyz wich gas is releasd whn NO3- is electrolysed...???

ummm..... if it is a molten NO3- compound then reaction does not occur but if it is aqueous then OH- ions are displaced and O2 is released

 

[a.abid]

a.abid ur help neede by others

where?where?where?

 

[daredevil]

any one with an answer?

A star already told the answer its ammonium sulphate (A).

 

[A star]

A star already told the answer its ammonium sulphate (A).

seriously it feels wierd and funny seeing some one call u A star

 

[a.abid]

seriously it feels wierd and funny seeing some one call u A star

lol then better change ur id simple

 

[A star]

lol then better change ur id simple

i said funny not bad

 

[a.abid]

i said funny not bad

haha okay A star.... lol

 

[a.abid]

i said funny not bad

It feels as if im talking with the real waala A* ...lol

 

[malay]

A dark, shiny solid, X, conducts electricity.
Oxygen combines with X to form a gaseous oxide.
What is X?
A graphite
B iodine
C iron
D lead
How r we suppose to know which oxide is gaseous n which is not?

 

[a.abid]

A dark, shiny solid, X, conducts electricity.
Oxygen combines with X to form a gaseous oxide.
What is X?
A graphite
B iodine
C iron
D lead
How r we suppose to know which oxide is gaseous n which is not?

answeris A....i guess cuz graphite is carbon and it willl form CO2 which is gaseous in nature..... is this correct? :|

 

[malay]

answeris A....i guess cuz graphite is carbon and it willl form CO2 which is gaseous in nature..... is this correct? :|

yup.. thanx
got one more
Q/8
http://www.xtremepapers.com/papers/...l O Level/Chemistry (5070)/5070_w10_qp_11.pdf
with reason??

 

[a.abid]

yup.. thanx
got one more
Q/8
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Chemistry (5070)/5070_w10_qp_11.pdf
with reason??

the answer is C.....I solved it by counting the no. of elements and there nos.... like 5 carbon+10 hydrogen+2 oxygen hope u got it

 

[asd]

"describe methods of purification by the use of a suitable solvent"
Does this mean that if two substances are mixed together, they can be separated by using a solvent in which only one of the 2 dissolves, and then filtering the insoluble substance to separate?

 

[a.abid]

"describe methods of purification by the use of a suitable solvent"
Does this mean that if two substances are mixed together, they can be separated by using a solvent in which only one of the 2 dissolves, and then filtering the insoluble substance to separate?

ofcourse....lemme give u the example of sand and salt.....sand is insoluble in water and salt is soluble...

 

[malay]

the answer is C.....I solved it by counting the no. of elements and there nos.... like 5 carbon+10 hydrogen+2 oxygen hope u got it

k i finally understand..thanx a bunch

 

[a.abid]

k i finally understand..thanx a bunch

np