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Q1. The equation Z3+ i Z -1 =0 has how many real roots ? The answer given is 0. BUT IF WE DO IT LIKE THIS : multiplying both sides by Z' [ Z conjugate ]... |Z|2 Z2 + i|Z|2 - Z' =0 then by inspection we get num of real roots a ...

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*Image* Indicate the bond energies of C-H bonds indicated by a, b ,c in ascending order. Please give reasons. ...

solve the following \int_{0}^{\pi }{\frac{\sin ^2n\theta }{\sin ^2\theta }}d\theta ...

I WANT TO KNOW WHAT IS ANTI- AROMATIC. NEVER LEANT ANY THEORY ON IT. NEED HELP GUYS.....PLEASE HELP ME KNOW IT !!!! ...

Consider a parabola Y=X2/4 and d point F(0,1). Let A1 (x1,y1), A2 (x2,y2), A3 (x3,y3)......,An (xn,yn) are 'n' points on the parabola such xk>0 and angle OFAk= \frac{k\Pi }{2n} (k=1,2,3...n).Then find d value of \lim_{n\ri ...

state true false: 1)H=G+TS {where symbol have their usual meanings} 2)CuCl2 reacts with H2S to form a mettalic sulphide!!! 3)pka+ pkb=pkw at all temperatures ...

*Image* For complete reduction,what is d value of X ...

Which is the correct order of bond lengths in methyl mercaptan (a)C-S > C-H > S-H (b)C-S >S-H > C-H (c)S-H >C-S > C-H (d) none ...

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Q1 if n postiive integers are taken at random and multiplied together and pn is probablity that last digit of product is 2,4,6,8.Find pn and p4 Q2 2 integers r,s are drawn one at a time without relacememnt from set 1,2,3...n. ...

DETERMINE THE DIRECTION OF FRICTION FOR PURE ROLLING MOTION OF THE RING: Please give reason. *Image* ...

q1 Let an=5n+7n and \Delta =\begin{vmatrix} a_{n+1} &a_{n+2} &a_{n+3} \\ a_{n+4} &a_{n+5} &a_{n+6} \\ a_{n+7} & a_{n+8} & a_{n+9} \end{vmatrix} then Δ= ? q2 Let \ f_k(x)=\int_{0}^{x}{(a_kt^2+b_kt+c_k)dt} \ for \ 1\leq k \leq ...

hey fr9ds long time i posted any question so here is 1 lets take a rod rotating abt a hinge so my question is around which pnt is the rod rotating abt its hinge or abt the com it can also be said to be rotating abt the com as ...

plz post the solutions for these questions 1) find the value of \int_{0}^{100}{[tan^{-1}x]} where [] equals gretest integer function 2)find the value of \int_{-2}^{2}{min {x-[x],-x-[-x]}dx } where [] denotes greatest integer ...

1)\lim_{x\rightarrow 0}\frac{sin(\pi cos^2 \pi)}{x^2} Π(pi) 2)lim x→1 (1+cos \pi x)cot^2 \pi x 1/2 3)\lim_{h\rightarrow 0}[\frac{1}{h^3\sqrt{8+h}}-\frac{1}{2h}] -1/48 4)\lim_{h\rightarrow 0}\left[\frac{(a+h)^2sin(a+h)-a^2s ...

Question 1 *Image* MY ANSWER: C ------------------------------------------------------------------------------------------------ Question 2 *Image* ----------------------------------------------------------------------------- ...

A disc initially at rest, starts rotating eith uniform acceleration.During first 5 secs it describes an angle \beta .During next 5 secs d angle described is \gamma . Find d value of \frac{\gamma }{\beta } . ...

A long metal rod of length l and relative density ∂ is held vertically with its lower end just touching the surface of water.The speed of the rod when it just sinks in water is given by a)√(2 g l) b)√(2 g l ∂) c)√(2 ...

*Image* .....the angle of the prism is 1/Ï€ ...disscuss the rays coming out of the prism ...

*Image* Two blocks A and B of masses 2 kg and 1 kg respectively are conected as shown and are at rest. The pulleys P1 and P2 are light and frictionless. A shell C of mass 1 kg moving vertically up with velocity 10 m/s collide ...

Which of the following carbocation can be easily isolated ? (A) (Me)3C+ (B) *Image* + (C) Ph-CH2 + (D) H2C=CH--CH2 ...

Pls explain the following VERY BASIC question with REASON / CONCEPT involved in it , the answers are given.... 1. One brass plate is inserted b/w two charges.The force between the two charges will : i. Remain the same ii Incr ...

S1 : The reaction of o-bromoanisole gives only meta-aminoanisole on reaction with KNH2 in liquid ammonia. S2 : The above reaction is an example of elimination-addition mechanism. ...

*Image* Find the VA-VC ...

find the magnetic dipole.....do show the method *Image* ...

How many possible ways to : ∫ dx/x ...

*Image* The above compound + Q 1. B2D6/CH3COOD Q 2. B2H6/D2SO4/D2O Q 3. B2D6/dil H2SO4 ...

S1 : A mixture of primary,secondary and tertiary amines is formed in good yield by heating carbonyl compounds with NH3 and H2 in presence of a catalyst. S2 : The eqb. constant for addition of NH3 to all carbonyl compounds are ...

*Image* (i) CH2PPh3 (ii) CH2I2/Zn -----> ?? ...