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hey where are you guys seeing the solutions from?!

can someone pls give me a proper link? becasue the one on the first pg isn't workin!

neeraj: minimum is when sin^-1x = pi/4 ..
maximum is when sin^-1x = - pi/2

thanks sandeepramesh! the site you said is damn good!

and most of all, it's latex enabled! :)

edited.. sorry sboosy. i made a terrible mistake..

Ans: assertion & reason r rite and reason is correct explanation.

the unionised F- reacts wid the HF.. this forms HF2- (as stated in the qsn)

and due to le-chatelier's principle, the equilibrium for the reaction

HF

H+ + F-

is shifted to the right as F- is getting depleted.

and hence, HF will furnish more H+ ions, thus increasing the acidity
:)

it depends on the type of connecting medium..
if its twisted pair, then 50-100..
otherwise, >100 is enough
:)

yes, but note in that link you gave me, there is the presence of HCl in the reactions..
without that HCl , the reaction wont take place as i've mentioned in my above post :)

flux is 0.

4. D
everything else has an O - O linkage

6.

N

C-C

N
hence,
6 pi bonds and 5 sigma bonds

@varshavallig: nitrosation happens only in the presence of a strong acid because then only will an NO+ ion be formed.
so i think your answer is wrong.

but if there was a strong acid like H2SO4, then your answer is right coz of the powerful +R grp N-(CH3)2 present, which is the other necessary condition for nitrosation :)

it depends on the frame of reference..

ha ha.. nice one einstein :D

but by intuition, me thinks the answer should be an isoceles triangle..
so answer is 75 degrees

let centroid be (h,k)
h = (sin@ + cos@ + 1)/3

k= (sin@ - cos@ + 2)/3

=> 3h - 1 = sin@ + cos @
and
3k-2 = sin@ - cos@

square the 2 equations and add them
we get:
(3h-1)^2 + (3k-2)^2 = 2

so locus of centroid is:
(3x-1)^2 + (3y-2)^2 = 2
which is a circle of centre (1/3, 2/3) and radius (rt2)/3
:)

required area is the shaded area in the figure..
by symmetry, area is

-2_[0]

^[1] lnx dx = -2[xlnx - x]_o¹

do lhospital for x-->0 xlnx

the answer turns out to be 2 sq units

s.h.i.t s.h.i.t s.h.i.t s.h.i.t!!! lampard youre right!!
somebody KILL ME!! :( :(
i forgot to take combinations of 3 or more x power terms!
so sorry akhil, but youve to consider -1*-2* -4 also
so answer is 13!