- Messages
- 1,394
- Reaction score
- 1,377
- Points
- 173
N 2011 q13 q24 q29 q30 q31 q34 q37 q38 q39
Can u plz solve these questions for me??
Can u plz solve these questions for me??
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
link?N 2011 q13 q24 q29 q30 q31 q34 q37 q38 q39
Can u plz solve these questions for me??
13c as they contain the common oxide of all three element hydrogen carbon and sulpher
in 13 i am confused y H2S or SO3 will not be formed?13c as they contain the common oxide of all three element hydrogen carbon and sulpher
24c as in first reaction is nuclophylic substitution in which C=O will be replaced with a c-cN and OH bond then H2SO4 oxidised the CN to CO2H and then it formed a ester of the formulae given
in the 24th question ... nitriles are oxidised to form acids right?? why is there a branching (OH) chain too?? that's wat confused me in this question...13c as they contain the common oxide of all three element hydrogen carbon and sulpher
24c as in first reaction is nuclophylic substitution in which C=O will be replaced with a c-cN and OH bond then H2SO4 oxidised the CN to CO2H and then it formed a ester of the formulae given
well you are burning the compound in air and they will break and oxidise them selves instead of reacting between themselvesin 13 i am confused y H2S or SO3 will not be formed?
oo i just confirmed all three answers... only 13th is ryt...29B as the dibromoalkane formed will form a diol as each bromine will be substituted by a OH ion
oh okaay thankswell you are burning the compound in air and they will break and oxidise them selves instead of reacting between themselves
and SO3 requires certain conditions or a very STRONG oxidising agent as SO2 will not oxidise easily
not branching Br are attached to two different Cs hence OH will also do the same hence they look branchedin the 24th question ... nitriles are oxidised to form acids right?? why is there a branching (OH) chain too?? that's wat confused me in this question...
ps typo error thats what i meantoo i just confirmed all three answers... only 13th is ryt...
24's answer is actually B
and 29's answer is D
ummm okay but now tell me about q24 too u explained Q29n
not branching Br are attached to two different Cs hence OH will also do the same hence they look branched
Q24 the answer will be B because see..ummm okay but now tell me about q24 too u explained Q29
yeah I'm just confused by the (OH) in the ester... i mean there is an alcohol group on the ester?? how does that work out?!!Q24 the answer will be B because see..
CH3CHO + HCN -----> CH3H(OH)CN
CH3CH(OH)CN + dil. H2SO4 ----> CH3CHCOOH (hydrolysis of nitriles forms acid)
acid + alcohol will give u an ester so CH3CH(OH)COOH + CH3OH ----> CH3CH(OH)CO2CH3 so the answer is B
did u get it ?
what's wrong with that? it doesn't matter and it can't react with the alcohol because they r both alcohols..compounds like these r called 'hyrdoxy' so this one will be calledyeah I'm just confused by the (OH) in the ester... i mean there is an alcohol group on the ester?? how does that work out?!!
in the 24th question ... nitriles are oxidised to form acids right?? why is there a branching (OH) chain too?? that's wat confused me in this question...
ohh okay -_- yeah i got u now.... gosh i cud just blow up organic chem if i got the chance!! every question seems to be an alien !! -_- x.xwhat's wrong with that? it doesn't matter and it can't react with the alcohol because they r both alcohols..compounds like these r called 'hyrdoxy' so this one will be called
2-hyrdoxy methyl propanoate (i guess thats the correct name) but alll what i want to tell u that it doesn't matter since there is a carboxylic acid group already reacting with an alcohol group then definitely we will have an ester..got me ?
ohh thanks.... that means.... no matter wat is dangling from the rest of the chain most of the times our main focus will be on the funtional group only. ryt?CH3CH(OH)CN > CH3CH(OH)COOH > CH3CH(OH)COOCH3
Answer B
ohh thanks.... that means.... no matter wat is dangling from the rest of the chain most of the times our main focus will be on the funtional group only. ryt?
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now