Chemistry: Post your doubts here!

[Awesome12]

Why can't it be C?

 

[lara dalal]

Why can't it be C?

View attachment 53826

How could it be C. The OH will combine with the H beside it to get removed as H20 and leave a double bond behind. In C the double bond formed is 2 carbons away from the position of OH. So the OH Could never reach the Hydrogen on that carbon 2 places away from it. In D the OH combines with the H on the Carbon right next to it ( they just showed a rotation in the figure in D to confuse you) I hope you understood what i mean

 

[EricWongCY]

Any tips for Chemistry P5?

 

[bludlynsolja]

Hi guys,

anyone with a link that has chem paper 5 solved, coz the mark schemes.......

ANY LINK WOULD REALLY B APPRECIATED.

 

[hamzashariq]

Hi guys,

anyone with a link that has chem paper 5 solved, coz the mark schemes.......

ANY LINK WOULD REALLY B APPRECIATED.

https://drive.google.com/folderview?id=0Bx_kNsO4S1YbZC1GOHI4TS1HOTA&usp=docslist_api&ddrp=1#

 

[The Sarcastic Retard]

Any tips for Chemistry P5?

https://www.xtremepapers.com/community/threads/chemistry-m-j-2015-paper-52.41463/#post-923477

 

[The Sarcastic Retard]

https://drive.google.com/folderview?id=0Bx_kNsO4S1YbZC1GOHI4TS1HOTA&usp=docslist_api&ddrp=1#

mehria hope this is useful to u too.

 

[bludlynsolja]

Thank you sooooo much bro!! i really appreciate you

 

[mehria]

mehria hope this is useful to u too.

ya i saw ths... thnk u (^_^) but today's paper was nthng lyk pastpapers... it was so different...

 

[bludlynsolja]

ye man!! paper 41 right?
it was completely dfferent trend, aahhhh after all that revision!

 

[ashcull14]

i knw D is corret but why cant the ans b C??

 

[qwertypoiu]

View attachment 53949
i knw D is corret but why cant the ans b C??

Perhaps you thought it said CO2H in the middle but look carefully it doesn't. Rather it says CO2CH which means this is an ESTER. So it is not acidic.

 

[princess Anu]

why is A correct?

 

[princess Anu]

ans is C
can somebody make me the isomers pls

 

[BhaiArshad]

why is A correct?

Single Unit:

 

[Iris Dylan Lane]

why is A correct?

 

[3l_general]

Plz help

 

[Abdel Moniem]

Plz help

Cl2+2NaOH-->NaCl+NaClO+H2O
Number of moles=Mass(g)/Molar Mass(g/mol), rearrange to get the mass as the subject of the formula. According to the chemical equation, all of the products are 1:1 to Cl2 in terms of mole ratio. Calculate the Mass of each product by calculating the Mr of each of the products using the help from the periodic table and use the 0.125 mol.

 

[Abdel Moniem]

ans is C
can somebody make me the isomers pls

CCl2=CH-CH3
CHCl=CClCH3 (This can form a cis and trans isomer)
CH2=CClCH2
CH2=CHCHCl2

 

[princess Anu]

thanks but these are only 5
the ans says there are 7 of them

CCl2=CH-CH3
CHCl=CClCH3 (This can form a cis and trans isomer)
CH2=CClCH2
CH2=CHCHCl2