Chemistry: Post your doubts here!

[AbbbbY]

From where have u brought this 9?

Number of primary hydrogens. I had to read the question several times to understand what 'game' the examiner was playing. He's taken a concept, twisted it, and asked it here.

 

[AbbbbY]

Dilute Cold* KMNO4

cold dilute, dilute cold. Whats the difference?!

 

[itallion stallion]

It will if you don't write ACIDIFIED.

Acidified K2Cr2O7 or (Cr2O7)2-/H+

What if I write heat in conditions where it is not mentioned in ms,but rest reagent and condition are complete,like if I want to make C6H5NH2 from C6H5NO2 and I use Sn +HCl and also heat so will writing heat negate the mark!

 

[itallion stallion]

Number of primary hydrogens. I had to read the question several times to understand what 'game' the examiner was playing. He's taken a concept, twisted it, and asked it here.

Really hard to digest,but Thanks aloot!

 

[Harsh Poddar]

I've made this site that can help you to quickly access past papers for a few common subjects. Try it out and please give feedback.

IGCSE: http://tinyurl.com/igcsepaper
AS & A Level: http://tinyurl.com/ciepaper

 

[Suchal Riaz]

I've made this site that can help you to quickly access past papers for a few common subjects. Try it out and please give feedback.

IGCSE: http://tinyurl.com/igcsepaper
AS & A Level: http://tinyurl.com/ciepaper

Thanks

 

[Suchal Riaz]

I've made this site that can help you to quickly access past papers for a few common subjects. Try it out and please give feedback.

IGCSE: http://tinyurl.com/igcsepaper
AS & A Level: http://tinyurl.com/ciepaper

does openshift has SSH support?

 

[Harsh Poddar]

does openshift has SSH support?

Yes it does

 

[Suchal Riaz]

Yes it does

i prefer a vitual linux server on my own PC and upload the sources to 000webhost they have neat URLs at least. you can upload the source by FTPs. co.cc is dead now. co.cc had support for nameservers but i haven't seen any other free domain registrar provide nameserver support for free.

 

[Harsh Poddar]

i prefer a vitual linux server on my own PC and upload the sources to 000webhost they have neat URLs at least. you can upload the source by FTPs. co.cc is dead now. co.cc had support for nameservers but i haven't seen any other free domain registrar provide nameserver support for free.

Yeah, but git is powerful for version control and I use it for my other projects and demo.

 

[Suchal Riaz]

Yeah, but git is powerful version control and I use it for my other projects and demo.

maybe we should start a separate conversation. these people would be confused my these things on chemistry thread lol

 

[Harsh Poddar]

maybe we should start a separate conversation. these people would be confused my these things on chemistry thread lol

Yeah We're spamming the forum

 

[MiniSacBall]

Group 1 compounds have white colors, while the Group 2 compounds are colorless! Right?
Transition metal have colored compounds right?

 

[Namehere]

Group 1 compounds have white colors, while the Group 2 compounds are colorless! Right?
Transition metal have colored compounds right?

Yes, not colourless - just white, and yes!

 

[Suchal Riaz]

Group 1 compounds have white colors, while the Group 2 compounds are colorless! Right?
Transition metal have colored compounds right?

no both 1 and 2nd group have white salts.
but CuO is black.
colorless means no fancy colors. very slowly cooled and pure crystals can be transparent also.

 

[Logitech]

Isn´t this supposed to be with cold dilute acidifed KMnO4?

oh yeah my bad.

 

[Haya Ahmed]

People I need someone to tell me the reaction of Al with Cl what happens without heating and with heating and the states of the products .. Thanks

 

[itallion stallion]

Someone plz help me with this
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s13_qp_52.pdf
Q1cvi(I don't know what to do in this part).thanks!

 

[A star]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s04_qp_4.pdf Q2c(i) i get the answer but cant we state the size of carbon atom being smaller than silicon as a valid reason

 

[NinjaInPyjamas]

Can someone please explain how to derive which Group and period an element is from using ionisation energies?