Biology; Chemistry; Physics: Post your doubts here!

[snowbrood]

one mole of

 

[snowbrood]

could any help me
i have exam tom

 

[snowbrood]

Clever enough to edit your post
And i guess you pasted the wrong question? It should K2Cr2O7 not KMnO4
If its dichromate then it will be B. SO2 is a reducing agent and it will change the colour of Dichromate to green. KI is a reducing agent itself so no change in colour!
Vogue

could u help me

 

[asd]

one mole ofView attachment 10432

D

 

[Vogue]

Clever enough to edit your post
And i guess you pasted the wrong question? It should K2Cr2O7 not KMnO4
If its dichromate then it will be B. SO2 is a reducing agent and it will change the colour of Dichromate to green. KI is a reducing agent itself so no change in colour!
Vogue

thank u
nd yes sure its K2Cr2O7

 

[asd]

No no wait..

 

[snowbrood]

D

yea i kw could u explain me how the sulfuric acid produces 3 moles of ions in aqueous

 

[haha101]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Chemistry (5070)/5070_w06_qp_4.pdf

Q3 d)

Nh3 =Y as is is lighter then air n soluble in water
Hcl= X as it is soluble n heavier thn water

 

[asd]

One for sulfate ion and 2 for hydrogen ions. 3 moles.
It reacts with a carbonate to give CO2, its acidic,

yea i kw could u explain me how the sulfuric acid produces 3 moles of ions in aqueous

 

[snowbrood]

One for sulfate ion and 2 for hydrogen ions. 3 moles.
It reacts with a carbonate to give CO2, its acidic,

if it was allowed to give a thousand likes then i would have given right away

 

[Dukeofwin]

Always getting the colors wrong! Is there any resource someone knows that could help in that part!

 

[haha101]

Always getting the colors wrong! Is there any resource someone knows that could help in that part!

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[asd]

if it was allowed to give a thousand likes then i would have given right away

Oh stop it you!

 

[Dukeofwin]

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Thanks

 

[haha101]

Thanks

just note that its SO2 nt SO4

 

[Dukeofwin]

just note that its SO2 nt SO4

Okay!

 

[a.abid]

Hey can anyone tell me,What will happen to the rate of reaction when the VOLUME is increased or decreased.Plz reply fast.

 

[haha101]

BTw How is everyone preparing ? wht are your techniques ? Any exam papers found difficult ? please let me know so that I can also practice em !

 

[haha101]

Hey can anyone tell me,What will happen to the rate of reaction when the VOLUME is increased or decreased.Plz reply fast.

I think its decreased ! Correct me if wrong

 

[asd]

Hey can anyone tell me,What will happen to the rate of reaction when the VOLUME is increased or decreased.Plz reply fast.

If the volume is increased, concentration must decrease and therefore rate will decrease.
I guess