Chemistry: Post your doubts here!

[Metanoia]

does 2chlorobutane react with hydrogen cynide???

CN- , yes.

HCN, no.

 

[Metanoia]

Which Entalhpy Changes could be positive and Negative?

Is this MCQ?

Perhaps heat of solution.

 

[ahmed faraz]

Is this MCQ?

Perhaps heat of solution.

Can Formation Be Positive and Negative?

 

[_Ahmad]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s11_qp_11.pdf

Q16(D),26(D)

 

[ashcull14]

 

[ahmed faraz]

And Can Sulphur Oxide be Present in Cars? They Sometimes Give X is present and Oxidizes In Atmosphere?
Could You Tell Which Oxides Could OxidiseIN AIR? THnx

 

[Jelleh Belleh]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s08_qp_1.pdf

Q6 please anyone?

 

[Metanoia]

Can Formation Be Positive and Negative?

For different substances, yes, of course.

 

[Metanoia]

And Can Sulphur Oxide be Present in Cars? They Sometimes Give X is present and Oxidizes In Atmosphere?
Could You Tell Which Oxides Could OxidiseIN AIR? THnx

The common question we deal with is Nitrogen monoxide.

SO2 --> SO3 and CO-->CO2 does not take place readily in atmosphere.

 

[GCE As and a level]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s08_qp_1.pdf

Q6 please anyone?

When u got the answer tag me plz

 

[Metanoia]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s08_qp_1.pdf

Q6 please anyone?

You can check post 9761

https://www.xtremepapers.com/commun...st-your-doubts-here.9859/page-489#post-824743

 

[IGCSE13]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q4 ansC

 

[ahmed faraz]

The common question we deal with is Nitrogen monoxide.

SO2 --> SO3 and CO-->CO2 does not take place readily in atmosphere.

Thank You SIR ))!!

 

[GCE As and a level]

The common question we deal with is Nitrogen monoxide.

SO2 --> SO3 and CO-->CO2 does not take place readily in atmosphere.

Sir,when is burning S in air gives SO2 and when it gives SO3 ??
Reaction of SO2 with ammonia will give us ........
Thnx

 

[IGCSE13]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s13_qp_12.pdf Q20 ansB and Q30 ansB

 

[Metanoia]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q4 ansC

w11qp12

Q4. I'll deal with it in grams and converted to moles , you can change back to kg.

 

[Ahmed Aqdam]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_11.pdf

Q16(D),26(D)

16: D as conc. H2SO4 displaces iodine from NaI so it must be a stronger oxidising agent. All others are opposite.

26: Cannot be B as this cannot be oxidised. In A and C only one CHO so will react with 1 mol of HCN.

 

[Metanoia]

Sir,when is burning S in air gives SO2 and when it gives SO3 ??
Reaction of SO2 with ammonia will give us ........
Thnx

Assume it gives SO2 as the main product, though its not suprising should a bit of SO3 should form.

Based on syllabus from years ago, a catalyst (vanadium oxide) needed to change SO2 to SO3 during manufacturing of H2SO4

 

[Metanoia]

View attachment 45183

Look for the molecule that can contribute most Cl radicals. Option A.

 

[..sacrifice4Revenge..]

When u got the answer tag me plz

You can check post 9761

https://www.xtremepapers.com/commun...st-your-doubts-here.9859/page-489#post-824743