2621st link - 1) 5 2)3 is it?
I could write questions here as it is time consuming. I wrote them here.
Please help me.
http://www.artofproblemsolving.com/Forum/viewtopic.php?f=330&t=458393
http://www.artofproblemsolving.com/Forum/viewtopic.php?f=330&t=458389
http://www.artofproblemsolving.com/Forum/viewtopic.php?f=330&t=458388
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6 Answers
71Aditya. I do have the solutions and answer given by them.. But could get to those answer..
Expecially, that X/y ratio question and that co ordination one. (Why it should be trans only)
Also my answer to the no. of isomers for NBS/Br2 reaction was also 3 .. But did't you see they have given answer as 9 ?
For 1st link, the given asnwer are : 1) 3 2) 9
2nd link : A
3rd link : I strongly believe that Nitrogen should attack the developing Carbocation instead of oxygen's lone pair (as what is done in solutions)
1the answer for x/y ratio
here they have specified that rate of hydrogen abstraction in any case is same,
hence, there are 6 hydrogen attached to primary carbon
and 2 hydrogen to secondary carbon,hence the ratio is 6/2=3
for nbs/br2 one the are three possible sites for attack but you have to also look at the number of possible isomers possible for the formed compound.
i am thinking that oxygen being more electronegative than nitrogen,has more tendency to donate electrons(2 lone pair than that of n),thus oxygen attack occurs.
how was your paper?how much are you expecting?
this time i felt that the paper was a bit easier on the difficulty level but had many questions.......
in chemistry how to find the geometrical isomers in the aromatic compuonds and conjugated aromtic compunds,many questions were there testing this concept.could you pls tell how to find it?
i think there will be a few corrections in the answer key....
71
i am thinking that oxygen being more electronegative than nitrogen,has more tendency to donate electrons(2 lone pair than that of n),thus oxygen attack occurs.
Isn't your explanation contradicting your solution itself?
I didn't do very well... I was distracted in many one or more type questions and ended up most of them in wrong.
Whaat about you? Since you did find the paper easy, you should fetch good marks.. (something above 220 odd)
1for the oxygen question
the answer given is with oxygen attack
all i am saying that oxygen having 2 lone pairs is full of electrons compared to nitrogen and hence it readily gives electrons to the carbocation and hence oxygen attacks the carbocation.
I too did many mistakes in the very easy questions,i m getting around 175-180.......what about you?