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(1)there are 24 balls of 6 different sizes in a bag, there being 4 balls of each size in four different colours .in how many ways 4 balls can be selected so that they are of differnt colours?????? (2) how many 5 digit nos. of ...

Q1 Find the no. of rational and irrational roots of x^3+1=2(2x-1)^{1/3} Q2 Let P(x) be a polynomial such that P(x^2+2)=x^{17}-3x^5+x^3-3 then find roots of P(x) Q3 Let a,b,c ε R and a≠0 be such that (a+c)2<b2 the nfind ...

(1) Prove that \left C(2n,n \right)/(n+1)=Integer where n\ \epsilon Integer ...

hi everyone ! i was of the opinion that we can handle inorganic chemistry for coming year's JEE in a different way ! all of us have observed the questions in the recent 5 years JEE papers ! so, what we can do is collect bits ...

(1)If no of ordered pairs (x,y) satisfying lyl = cosx & y = sin-1(sinx) is m when l x l≤2∩ & n when l x l ≤ 3∩ Then A)m+n = 0 B)m+n =2 C)m+n =10 D)n-m =0 E)n-m=2 (2)If the no of solutions of ln l sinx l = -x2 + 2x , x ...

Which has highest dipole moment? CH3Cl CHCl3 CH2Cl2 CCl4 ...

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why is a compound with paired electrons diamagnetic and unpaired paramagnetic? ...

Well ,let's make mincemeats of these --- :) 1 > Do try to find the remainder when 21990 is divided by 1990 . I have found a way without using binomial but , still it would good to see the other ways too ---- maybe an easie ...

If x is real, the maximum value of - y = 2\left(a-x\right) \{ x+ \sqrt{x^2 + b^2} \} is ________ ? ...

The internal pressure of a real gas is inversely proportional to the square of molar volume TRUE/FALSE ...

Ques1) Let f(n) = 10 n + 3.4 n+2 + 5 , where n belongs to N. The greatest value of the integer which divides f(n) for all n is (a) 27 (b) 9 (c)3 (d) none Ques2) If m and n are any two odd positive integers with n < m , the ...

find in order the Ratio of σ and Πbonds: A-tetracyanomethane B-CO2 C-benzene D-1,3 buta-di-ene ...

this thread aims at discussions on all possible aspects of organic chemistry that we feel are important for JEE 2010 ! members can put forward their question in this thread and we shall try and answer them together ! short co ...

Q1 Find the real values of a,b,p,q for which (2x-1)^{20}-(ax+b)^{20}=(x^2+px+q)^{20} Q2 Find Sum of series S=C_1-(1+ 1/2)C_2 +(1+ 1/2 +1/3)C_3+...+(-1)^{n-1}(1+ 1/2+....+1/n)C_n Q3 Sum of series S=\sum_{r=0}^{n}\frac{3^{r+4}. ...

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6 apples and 6 oranges are to be distributed among 10 boys. Find the number of ways in which this can be done . Ans : (10+6-1 C6 )2 How can this be possible ?????????? ...

A circle S=0 passes thru the common pts of intersection of family of circles x^2+y^2+λx-4y+3=0 & have min area then (A) area of S=0 is Πsq units (B) radius of director circle of S=0 is 2 (C) length of intercept made by S=0 ...

1)a uniform circular loop is rotating clockwise in absence of gravity with tangential speed v0.if v be velocity of transverse waves travelling on the strin then v>v0/v<v0/v+v0?(wat is the meaning of the question?) 2) ...

S[n]= 3/4 +15/16 +63/64+...... find S[n] a) n - 1/3*4^(n) -1/3 b) n + 1/3*4^(-n) -1/3 c) n + 1/3*4^(n)- 1/3 d) n-1/3*4^(-n) +1/3 ...

*Image* In the given figure, u have the road plan of a city. A man standing at X wants to reach the cinema hall at Y by the shortest path. (i) Find the no. of different paths that he can take. (ii) Find the no. of shortest ro ...

A parallelogram OABC ,s.t a,b,c respectively are position vectors of A,B,C wrt O (origin).A poin P is taken on BC which divides it in ration 2:1.Also line segment AP intersects the line bisecting angle O internally in point Q ...

a small heavy block is attached to the lower end of a light rod of length l which can be rotated about its clamped upper end.what minimum horizontal velocity should be given so that it moves in a complete circle? ...

Q1 Ammonia +Hypochlorite anion→ ?? Q2 When zeolite which is hydrated with sodium aluminium islicate is treated with hard water,the sodium ions are exchanged by ? Q3 NH4NO3 +Heat → ? Q4 NH4NO2 +heat→ ? Q5 Glycine +heat â ...

Q1 Which can not reduce acidified soln of MnO4 - a)H2C2O4 b)H2 c)H d)Fe2+ Q2 which oxidising agent is not used for oxidn of mangantae to permanagante a)CO2 b)H2O2 Q3 which of the following cannpt be oxidised by acidified KMnO ...

Does solid BeH2 have linear structure? ...

Q1 St acid among follwing in non polar acetic acid medium is ? a)HF b)H2SO4 c)HClO4 d)HI Q2 Write ionic eqn for NaH +H2O→ ? Q3 Why there is very litle diff in acid strength of H3PO2,H3PO3,H3PO4 ?? Q4 T/F i)carbonates of Na, ...

Structure of S2Cl2 is analogous to SOCl2 CO2 H2S H2O2 ...

This dbt is from what aieee said at http://targetiit.com/iit-jee-forum/posts/ino5-12714.html in post#12 Q Why ionic azides are stable while covalent azides are not ?? ...

1) Last two digits of 3100 are .... 2)Last three digits of 17256 are... 3)The remainder when (a) 597 is divided by 52 (b) (106)85 - (85)106 is divided by 7 (c) 3100 is divided by 100 ...