Biology; Chemistry; Physics: Post your doubts here!

[GetSomeLife]

sulphate ions or gas?

ion

 

[Spidey21]

ion

add dilute nitric acid and barium nitrate to the sample...
white ppt of BaSO4 will form

 

[asd]

ion

Sulphate Ions can be tested by adding dilute nitric acid followed by barium nitrate, White Ppt. of Barium sulfate will be formed.

 

[Ahmedfj]

B(i) hydrogen
(ii)pops and extinguishes a lighted flame

b iii and b iv please

 

[GetSomeLife]

add dilute nitric acid and barium nitrate to the sample...
white ppt of BaSO4 will form

I got that. But the book says Barium Sulphite can also be formed and that is also white -.-

 

[GetSomeLife]

Sulphate Ions can be tested by adding dilute nitric acid followed by barium nitrate, White Ppt. of Barium sulfate will be formed.

I got that. But the book says Barium Sulphite can also be formed and that is also white -.-

 

[Vogue]

Aluminium Oxide

is there any need to ryt aluminium (iii) oxide?

 

[Spidey21]

b iii and b iv please

b(iii) turns bluish
(iv) as the hydroxide ions gather around it..

 

[GetSomeLife]

is there any need to ryt aluminium (iii) oxide?

No, alumuniom only has one oxidation state. +3

 

[Spidey21]

is there any need to ryt aluminium (iii) oxide?

its better you do cuz the formula is Al2O3...

 

[ashiqbal]

wat r the catalysts that r used in cracking of hydrocarbons?specially the ones used in the apparatus where there is this tube in which there is a cotton plug soaked in hydrocarbon oil leading to a tube that hv a catalyst nd then ethene is collected abv a water tank in a test tube.

aluminium oxide catalyst is used there.

 

[Spidey21]

No, alumuniom only has one oxidation state. +3

so you got your answer...?

and in the barium sulphite case you can write either than
cuz after all its Barium reacting with sulphate...

 

[asd]

Ignore the book

 

[ashiqbal]

its better you do cuz the formula is Al2O3...

no need i think!

 

[Spidey21]

wat r the catalysts that r used in cracking of hydrocarbons?specially the ones used in the apparatus where there is this tube in which there is a cotton plug soaked in hydrocarbon oil leading to a tube that hv a catalyst nd then ethene is collected abv a water tank in a test tube.

that process is called cracking and the catalyst used is Al2O3...or aluminium oxide..

 

[GetSomeLife]

so you got your answer...?

and in the barium sulphite case you can write either than
cuz after all its Barium reacting with sulphate...

Barium reacts with the sulphite, too. I mean there is no guarantee it WAS a sulphate. The book just causes problems!

 

[Spidey21]

Barium reacts with the sulphite, too. I mean there is no guarantee it WAS a sulphate. The book just causes problems!

dude tension makawa!!
www.google.com

 

[GetSomeLife]

dude tension makawa!!
www.google.com

wo to sab se baray masail khare karta hai

 

[Spidey21]

wo to sab se baray masail khare karta hai

ye lo
samajh aye to bata dena LOL
http://www.docbrown.info/page13/ChemicalTests/ChemicalTestsa.htm#Sulphate

 

[Ahmedfj]

b(iii) turns bluish
(iv) as the hydroxide ions gather around it..

dude .. arent the hydrogen ions supposed to be gathered round the cathode ??

 

[syed1995]

Fermentation
Hydrogenation
Hydrolysis
Hydration
Cracking
Addition
Substitution
Esterification
Polymerisation
Fractional Distillation of Crude Oil


Did i missed anything? which is in organic.. now tell me which catalyst is used for each if there is used any.