Messages posted by hurricane

Locus Education, one of the best coaching classes institutes in Delhi, Noida and Lucknow, 19th May, 2009 has been in providing IIT-JEE, AIEEE coaching classes, IIT JEE correspondence Courses for many years. It has announced a free test series for the IIT-JEE aspirants.

I found this in a site

Is it true..................?????????????

here it is

.http://en.wikipedia.org/wiki/Leibniz_integral_rule

what topics are to be done from J D LEE?

I got that book a week back and every topic seems to be a jupiter...........

CH(COOH)3

by the order of vowels it means that only after the appearance of i ,the letter e should appear and only then should a appearin the word

all of these

ferric chloride gives purple color with phenols

diazonium salts give coupling reaction with phenol

phenol is a stronger acid than the other bcoz of resonance stabilization

if the 4 th term is not with 2^4 it doesn't seem to be a sequence..................

ok fine bro,

2^n factor in the ans is obvious.

just look at the other part.

2,4,7,11,16................

or

2

2+2

2+2+3

2+2+3+4 etc

2+3+4... can be added up by the summation formula if we add and subtract 1

so{ 2+[(n^2+n-2)/2]}2^n

upon simplification u get the ans

(2^n)(n^2+n+2)/2

the final thing,the square symbol and x stand for dx

applicable when a+b =1

only then f(a)=f(b)

using hospital's rule

L=lim as x tends to 0

ncos(x)^n (x)^n-1/[m cosx sin^m-1 (x)

now analyze the various cases.

when n>m,

n-1>m-1

so remove [sin x/x]^m-1

l= n cos x^n etc and in num u have x^n-m

so this is 0

when n=m,sub in the limit after applying hospital's rule.

ans is n/m

if n<m limit tends to infinity

i dont understand yr d option.

average velocity is -5/6 meter per sec

apply

v^2-u^2 =2as twice

1600=900+2as

2as=700

for the req answer,

v ^ 2 =900+2a(s/2)

=900+700/2

=1250

v is sqrt(1250)

hello friends,

i'm sure aspiurants for jee2010 must have downloaded locus notes.

if anyone is interested why dont we discuss maybe some important chapters everyweek

we'll plan what chapters to discuss for that week (not restricted only to locus) and maybe we shall discuss........................

any1 interested??

no one has tried huh.............

hey ,I get an answer square root over 20gL/3

why is kolbe electrolytic synthesis not possible in case of aryl carboxylic acids?

I guess it is due to resonance.

just check out your next post http://www.goiit.com/posts/list/organic-chemistry-how-to-convert-benzene-to-propanoic-acid-954909.htm

It follows from 2nd step I suppose

see,I'm assuming that you don't want to use any other org compound as a reagent.otherwise the procedure may be short

1.ozonolysis.u get glyoxal.

2.reduce glyoxal using red P.ethane is formed

3.HBr is added product is ethyl bromide.

4.take one molecule and oxidize it to ehanoic acid

.5.decarboxylation.you get methane

6.add HBr to get methyl bromide

7.corey house synthesis. you get propane

8.HVZ reaction.product is 2 br propane

.9.alcoholic KOH

10. HBr with peroxide you get 1 bromo propane

11.aq.KOH followed by oxidation.finally u get propanoic acid

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