3 Days 105/6·MOLE:WHAT mass of 60% HCl (by mass) is required to completely react with 0.2 mol of zinc.The reaction is :
Zn +2HCl -> ZnCl2+H2
27 Days 220/14·Stoichiometry: 1) What is detonating gas?
2)When the mixture of MgCO3 & CaCO3 was heated for a long time, the weight decreased by 50%. Calculate the percentage composition of the mixture.
3)Calculate the weig..
31 Days 337/4·eee counselling:after the first allotment of seats in aieee
if they allot me a seat, is it possible for me to leave that seat
n go for next round n also tell me that i..
31 Days 187/8·probability basic problem:Suppose you have a cloth bag with one marble inside-either black or white, you don't know which. You add a white marble, shake the bag, and take out a marble at random. It's white. What are the odds t..
33 Days 332/13·SECOND INNINGS-II:1.>If f(x)= x sin(Π/x) ,x>0
0, x=0, then in (0,1) f'(x) vanishses exactly at how many points?
2>Find the point on 9y2=3x2 ,where the normal to it makes equal interc..
34 Days 312/9·Try ...:[image]52629563.jpg[/image]
[image]52629589.jpg[/image]
EDIT:- In Q3 b) part, heat is also there
39 Days 565/27·top three horses:many of you have done this
There are 25 horses and 5 race course. that means you can run atmost 5 horses in one race.
What will be the number (minimum) of races required to find the top 3 horses..
39 Days 263/9·mechano:ABC idnetify with mechanism
[image]30785829.jpg[/image]
45 Days 1279/56·electrostatics dobtSS......:Point charges q and --q are located at the
vertices of a square with diagonals 2l as shown
. Find the magnitude of the electric
field strength at a point located symmetrically
with respect to t..
46 Days 144/5·A STUPID DOUBT!:[image]51988008.jpg[/image]
plz give me the solution for this one!
47 Days 504/18·AIEEE Organic:[image]46642648.jpg[/image]
Agar aise questions AIEEE mein aayenge..I will be damn surprised!
47 Days 212/5·Aromatics...:THIS QUESTON IS STRICTLY FOR PRITISH SINCE HE THREATENED TO SHOOT ME IF I DO NOT GIVE HIM AN ORGANIC QUESTION AND I AM AFRAID OF THAT :P
A soln. of 0.01 mole tert-butyl peroxide in excess ethylbenz..
48 Days 234/9·Chemical Kinetics:i have a basic doubt.
Isnt order of a chemical reaction determined only experimentally ?
i mean can we find order just by looking the balanced chemical eqn ?
[hide]i think it can only be fo..
49 Days 168/7·Organic help:[image]41828639.jpg[/image]please tell the name of this compound....
49 Days 175/2·BITS admission query: Hey guyz, plz plz help. I have already filled my preferences for courses at BITS. I gave topmost priority to BE’s at Goa, then followed by BE’s at Hyderabad, and finally the MSc’s at Pilan..
50 Days 209/11·most basic??:which of the following is more basic??
(C2[/ss]H5[/ss])3[/ss]N & [image]49053046.jpg[/image]
50 Days 164/8·Why??:Why is a^0 = 1 ??
Where a is any number.
56 Days 153/3·wat the system is?:if one opts for a higher ranked branch as first option then the second one as a lower ranked one..he ends up getting the higher one..but he wishes to join in lower branch....so will they allow to join..
56 Days 200/5·Help:I have got 12k rank in AIEEE,280 marks in BITSAT
q1 Which option should I choose ?
q2 Will AIEEE and BITS cutoffs fall ?
q3 Is MSc from BITS good ?
58 Days 224/5·:P :P :P aieee urgent :P ..:hey i saw that in IITs the ARCHITECHTURE stream is dependent on main JEE exam result......
NOW MAIN DOUBT::::::::one of my friends got a really baddddddd rank in main AIEEE exam meant for B.TECH/B...
70 Days 1155/31·CBSE XII- Results2010:.............................................................................
Not to jump, date hasn't been declared yet.
Jump now if u feel like it...19th May 2010 (Chennai/Ajmer/PAnchkula region..
71 Days 347/9·2 min DI:.......................................................................................................................
http://data.artofproblemsolving.com/images/latex/4/8/7/487ae414bbb84439638bb0..
73 Days 240/12·18-05-10 : Organic Miscel..:The first two questions were the very first tough questions I did(from Alkyl Halides too)...way back in the beginning of class 12th FIITJEE. Let's see how you all fare!
[image]49663165.jpg[/image]
..
74 Days 234/24·BitsatAnalytical - FinalQ..:1) i.All donkeys are humans
ii.Some humans are not tigers
From above statements we can conclude that-
A- Some donkeys are Tigers
B- Some tigers are donkeys
C- Some humans are donkeys
D- S..
74 Days 668/31·BITSAT 2010:Please all the Targetiitians and BITSAT 2010 aspirants, all those who gave BITSAT this year, please discuss about the questions and pattern and difficulty level of the paper here........
75 Days 153/4·from rpf part 2 :http://codecogs.izyba.com/gif.latex?%5Cmathrm%7Bf%28x%29%7D%3D%281+2%5Ccos%20x%29%281+2%5Ccos%202x%29%281+2%5Ccos%204x%29........%281+2%5Ccos%2032x%29[/im]
then find
http://codecogs.izyba.com/g..
76 Days 221/8·CRAZY Q:GUYZ..THIS IS ALLEGEDLY A BITSAT QUESTION.... FIND THE ODD-ONE OUT
A>NEEDLE
B>GRAUPEL
C>COLUMN
D>DENDRITE...PLZ GIVE REASON
76 Days 249/8·QUESTIONS ON PROGRESSIONS:1.FIND http://codecogs.izyba.com/gif.latex?\left(1+\frac{1}{3}%20\right)\left(1+\frac{1}{3^{2}}%20\right)\left(1+\frac{1}{3^{3}}%20\right).....[/im]
2.COEFFICIENT OF x98 in http://codecogs.izyba.c..
76 Days 401/26·14-05-10 : Alkyl Halides:Today's question has three parts(fairly easy) -:
(a) The rate law for the substitution reaction of 2-bromobutane and HO- in 75% ethanol/25% water at 30°C is given as
Rate = 3.2 x 10-5 [2-bromob..
76 Days 133/10·from rpf:some questions for bitsat practice
Q-1
http://codecogs.izyba.com/gif.latex?%5Ctexttt%7Blet%20x%2Cy%20be%20selected%20from%20SET%7D%5Cleft%5C%7B1%2C2%2C3%5Ccdots15%20%5Cright%5C%7D%5C%5C[/im]
..
76 Days 72/3·Test:295 QNo:1:1. The conversion of Nitriles into aldehydes is called
77 Days 415/16·aakash aits 3 :hopeless chem questions
Q1. Choose the incorrect statement
(a) In [Fe(CN)6[/ss]]4- , Fe-C bond length is smaller than Fe-C bond length in [Fe(CN)6[/ss]]3-
(b) EAN of Fe in [Fe(CN)6[/ss]]4- is 36
..
77 Days 215/4·books:i am a starter in physical chemistry
is arihant objective approach towards physical chemistry a better book
or sholud i buy standard physical chemistry book???
plz help
78 Days 190/5·Riddles...:1. What English word retains the same pronunciation, even after you take away four of its five letters?
2. If I say "Everything I tell you is a lie," am I telling you the truth or a lie?
3. What..
78 Days 1272/85·Optical Isomerism? NO. Tr..:Welcome to the Great Organic Chemistry Challenge kiddos. Let's see what you got. Give it your best shot. You should know that I don't have the answers to any of these questions. Don't bank on me. Wake..
79 Days 318/51·itsy BITSy:6 men and 2 women take 5 hours to finish a work.How much time does it take for 3 men and 1 woman to finish the work?
a 2½ hours
b 5 hours
c 10 hours
d Data Insufficient
79 Days 278/15·Book-O-Phobics:Verma!,Resnick!,Irodov!,Arihant!,MLKhanna!,ADG!,TMH!,MorrissonBoyd!,Finar!,Loney!....
NO...This is not fr the typical JEE stuff tht we are usually submerged in, this is to share ur fav books (ficti..
80 Days 129/8·Max or Min:Q1)
For any acute angled triangle, http://codecogs.izyba.com/gif.latex?\Delta%20ABC[/im] find the minimum value of
http://codecogs.izyba.com/gif.latex?\frac{sin%20A}{A}+\frac{sin%20B}{B}+\frac{..
80 Days 236/6·@NISHANT SIR.....:sir aap baar bar ye explain kar rahe hain ki internal reflection ho jata hai!!!but i have also seen in a lecture on rainbows ALONGWITH T.I.R. refraction too occurs.......n this seems something really..
82 Days 182/21·BITSAT Chemistry practise..:Q1) Match the List I with List II and select the
correct answer using the codes given
below the list:
List I List II
(A) Peroxide (P) Fe3O4
(B) Sub..
83 Days 130/7·BITSAT english proficienc..:Q 1-3 , a capitalised word is
followed by four words numbered 1 to 4.
Choose the word that is most opposite to the
meaning of the capitalised word
Q1) SCINTILLA
(1) Unscientific
(2) Huge qu..
83 Days 62/1·A standard functions ques..:Let f(x) be a polynomial, such that
f(x).f(1/x)=f(x)+f(1/x), and f(3)= -26. find f(x).
83 Days 97/11·Matrices:1) Find the least positive integral value of "k" such that it satisfies-
http://codecogs.izyba.com/gif.latex?%7B%5Cbegin%7Bpmatrix%7D%20cos%5Cfrac%7B2%20%5Cpi%7D%7B7%7D%5C%20-sin%5Cfrac%7B2%20%5Cpi%..
83 Days 39/1·matrix : If A, B are two square matrices such that AB=A and BA=B , then prove that B2=B
85 Days 1157/59·i walk alone!! :O:you know what the blue box beneath reads
"WebSite Status: Total 1893 Registered users, Total 869551 PageViews, Total 114184 Visitors.
Online Status : Currently 14 guests and 1 users Online. Max..
86 Days 145/15·just a second:Is corrosion an electrochemical phenomena ??/
The IUPAC name of the compound with the structural formula CH3 - CH = CH - C [img]acetylene[/img] CH is
(A)pent-2-ene-4-yne
(B)pent-1-yne-3-ene
87 Days 340/12· Doubts in Photoelectric ..:1) A point source of light is placed at the centre of curvature of a hemispherical surface.the radius if curvature is r and the inner surface is completely reflecting.Find the force on the hemisphere ..
87 Days 812/29·inverse trigo and series ..:given
S = tan-1(1/3)+tan-1(1/5)+tan-1(1/7)+..........+tan-1(1/(2n-1))
if S = Π/4
find n
87 Days 1271/96·BITSAT Reasoning Practise:added Q20 , Q21 , Q22
Q1)
If KMF can be written as LLH then RMS =
a) SLR b) SLU c) SSU d) SUS
Q2)
If corden can be written as zrogbq then what can be ..
88 Days 233/13·Organic.....Straight from..:[image]48053500.jpg[/image]
[image]48053678.jpg[/image]
[image]48053950.jpg[/image]
[image]48054290.jpg[/image]
[hide]plz post your solutions also...[/hide]
88 Days 136/4·chemistry website:can anyone suggest a website offering help in chemistry. i m very confused with this subject.
91 Days 206/7·Never understood this cat..:Q. A solution containing 2.675g of CoCl3[/ss]. 6NH3[/ss] (molar mass = 267.5 g/mol) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3[/ss] ..
92 Days 473/20·thanks!!!!!:thanks a lot bhaiya!n all friends n all TIITians
as few guys don want me here naymore so i think i shud not trouble them and give them there wish so leaving...........
but i liked this forum since..
97 Days 606/28·IPL 2010 winner:umm if i am not wrong
they ll faulter in the semis of finals!!
chek out!!
98 Days 859/31·exceptions in organic che..:well....organic a nightmare for many fun for others....a house of many exceptions to basic phenomenon n reactions is the beauty of ORGANIC CHEMISTRY!!!!!!!
so this thread is dedicated to those except..
100 Days 786/74·Aieee questions:MORE ADDED1.A beaker containing water is balanced on a pan of a common balance.A solid of specific gravity 1 and mass 5 g is tied to the arm of the balance and immersed in the water of the beaker.The ..
101 Days 206/11·AIEEE 2008:1)The solution of the differential equation http://codecogs.izyba.com/gif.latex?%5Cfrac%7Bdy%7D%7Bdx%7D%3D%5Cfrac%7Bx+y%7D%7Bx%7D[/im] satisfying the condition y(1) =1 is
(1) y=xe(x-1) (2) y=..
101 Days 207/13·aieee 07 dbts:[image]47239070.jpg[/image]
101 Days 135/4·Find The ProDuct:Ques. Which of the following is incorrect for the reaction?
[image]47196774.jpg[/image]
4th option
C IS [image]47196897.jpg[/image]
102 Days 205/9·Ionic Equillibrium:Ques.)
2 moles of PCl5 are taken in a closed vessel. At equilibrium the vessel contains 2.5 moles. The degree of dissociation of PCl5 is
1. 0.25
2. 0.5
3. 0.4
4. 0.2
103 Days 738/45·CUTOFF:what cutoff u people expecting can it go below 160 as per the examination pattern , paper difficulty level ,increment of seats in IIT, mistake in heading in omr sheet.
104 Days 347/3·general organic chemistry..:which of the following behaves as (a) a nucleophile (b) an electrophile (c) both or (d) neither?
Cl minus , NO plus , H2O , CH3Oh , CH4 , CH2O , CH3CN , CH3CH=CH2 , AlCl3 ..
113 Days 210/18·Bmat7 dbts........:plz rpely ASAP
[image]45713819.jpg[/image]
113 Days 217/10·Sum of the solutions...:Sum of all the solutions in [0, 4π] of the equation-
tanx + cotx +1 = cos(x + π/4) is ??
113 Days 231/22·ionicc....:[image]46133068.jpg[/image]
113 Days 146/4·chalte chalte depreesion ..:the depression in freezing point (for the same amount of each) is:
acetic acid
114 Days 139/4·refraction:
[image]46157694.jpg[/image]
114 Days 100/2·Solid state Doubt:1) A metallic element crystallises into a lattice containing a sequnece of layers of ABABAB..
Any packing of spheres leaves out voids in the lattice.
Percentage of Empty Space (by Volume) is -
a)..
114 Days 151/8·Organic Test QUestions:Qn(s) frm one of the OrG. tests here.
1) Among the following which is highly acidic?
3-hydroxy Benzoic acid
2-hydroxy Benzoic acid
4-hydroxy Benzoic acid
a) 3>1>2
b) 2=1>3
c) 1>2>3
d..
114 Days 667/19· The Final Assault - Last..:Getting into the IITs - the hallowed portals of high class engineering education in India requires one to cope with immense competition, the changing pattern of the exam year after year and in the end..
114 Days 114/3·Test:296 QNo:3:
Reaction of HCHO and CH3—CHO in the presence of KOH solution is called
115 Days 257/26·aiats 14 chem:Q1. multi:
cooloidal gold can be prepared by
(a) bredig's arc method
(b) reduction of AuCl3
(c) hydrolysis
(d) peptization
Q2. multi:
Select correct statements
(a) Buring carbylamine rkn, in..
115 Days 129/6·RTPF Integer Type:Number of S-S bond present in P4[/ss]S3[/ss] is ___.
Can we do this if we dont know the structure ?
115 Days 94/3·RTPF 9:An optically active alcohol (A) [C6[/ss]H10[/ss]O] absorbs 2 moles of hydrogen per mole of upon catalytic hydrogenation and gives a product . is resistant to oxidation by CrO3[/ss] and does not show ..
115 Days 118/8·Combo Pack -III::: Single Option Correct ::
[image]45904604.jpg[/image]
(Thts a Methyl Group in Qn 2))
3)Which can be prepared from NitroBenzene by SE [/ss]reaction...?
a) o-dinitro benzene
b) p-dinitro ..
115 Days 143/9·Cbse english:Has anyone got an idea as to the range of marks achievable in english in CBSE boards?Is 90 a gettable target?
plz reply soon.
116 Days 497/40·DOUBTS!!!:NEWLY ADDED QUESTIONS unsolved questions are underlined.
1.for what value of k the system of linear equations x+2y+x=1;x+3y+4z=k;x+5y+10z=k2 has solution?find the solution in each case. [roorkee 97] ..
117 Days 139/4·3 Badhiya Conversions...!..:Convert Benzene to -
1) Ph-CH2[/ss]-CH2[/ss]-D
2) Ph-CHD-CH3[/ss]
3) para-D-(C6[/ss]H4[/ss]-CH2[/ss]CH3[/ss])
[hide] In not more than "X" no. of steps, where "X"→ ∞ .... :D [/hide..
117 Days 107/4·Combo Pack -II:1) Total no. of stereoisomers for-
Me--CH(Cl)--CH=CH--CH=C=C(Me)--Me .....?
2) Total no. of products on MOnochlorination of n-Pentane in the presence of sunlight ?
3)Arrange in Decre..
119 Days 371/11·whats formed ??:1) FeCl3 +SO2 →
2)Fe2O3 +NaOH +Cl2 →
3)CuSO4.5H2O +KCN(excess)→
will add more later....
***not my doubts....just some exception reactions ***
119 Days 85/2·Chemical Kinetics:1)Nitrogen monoxide, NO, reacts with hydrogen, H2, according to the following equation:
2 NO (g) + 2 H2 (g) → N2 (g) + 2 H2O (g)
If the mechanism for this reaction were, 2NO(g) + H2(g) N2(g) + H2..
120 Days 85/3·doubts...function domain!..:find the domain of f(x)
f(x)=cos-1[frac]1+x22x[/frac]+[sqrt]sin(cosx)[/sqrt]
please help!!
120 Days 79/1·The Baseless Base:Vapour Pressure of 0.01molal sol.n of a weak base BOH in water at 200C is 17.536mmHg.
Calculate "Kb[/ss]" for the base, given that Aqueous Tension at 200C is 17.540mmHg.
(Also assume the base's ..
120 Days 409/27·p block dbts:**I am hiding the solved questions....**
[hide]1)Hydrolysis of PI3 gives ??[/hide]
2)Decomposition of H2O2 is lowed down by addn of ??
[hide]3)compound which is used in space vehicels to abso..
120 Days 118/6·Doubt in trigo:Find the value of:
tan81° - tan63° - tan27° + tan9°
121 Days 284/7·InteGer Type:1) Find the value of y(log4), if
y2[/ss] -7y1[/ss] +12y=0,
given that- y(0)=2 & y1[/ss](0)=7.
2) :: Done ::
If a function f(x) satisfies-
i) f(x+y)= f(x).f(y)
ii) f(x)= 1 + x.g(x), w..
121 Days 218/9·AAKASH AIATS 13:[image]45457883.jpg[/image]
[hide]i've marked d...[/hide]
122 Days 159/15·Solidifying Solid State::: Single option Correct ::
1) A metallic element crystallises into a lattice containing a sequnece of layers of ABABAB..
Any packing of spheres leaves out voids in the lattice.
Percentage of Emp..
122 Days 237/23·POLLS , ELECTION and DEMO..:I give the power to you to vote the BEST OF THE TWO BOOKS that I'm listing down
for CLASS XII MATHEMATICS (a slight change in the thread (the earlier was calculus : [hide]http://www.targetiit.com/..
122 Days 182/13·quesss:Q1
[image]45446694.jpg[/image]
Q2
[image]45446707.jpg[/image]
Q3 any concept for this question ???????????or simply memory stuff ??
[image]45446723.jpg[/image]
122 Days 101/5·INverse:If "f" is a Decreasing Odd fn., f-1 is -
a)Odd, Decreasing
b) Odd, Increasing
c) Even, Decreasing
d) Even, Increasing
122 Days 157/8·Combo Pack:1- Suggest a Chemical Test to distinguish b/w -
[image]44996234.jpg[/image]
2- Chloro Benzene is subjected to the following-
i)Nitration mixture
ii) Cl2/FeCl3
iii) NH2-NH2
The Final Product ..
122 Days 218/9·AIATS 13:Q1.[hide] Let http://codecogs.izyba.com/gif.latex?%5Cbegin%7BBmatrix%7D%20x_%7Bn%7D%20%5Cend%7BBmatrix%7D[/im] be a sequence of real nos satisfying the recurrence relation
http://codecogs.izyba.com..
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