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now my goodness....explain this... *Image* now...i thought....stability is in order I<IV<III<II but actually it is given I<IV<II<III how the hell II<III II is outright conjugated...III is it conjugated... ...

how to understand which of a free radical is stabler?? we know that conjugated system is stabler than 3° is stabler than 2° which is stabler than 1° and ultimately weakest is .CH3 but what if the question involves things l ...

question if the ring like mass m1 comes down a distance h what is the ratio of v1/v2 my method i solved this problem mainly on intitution like i drew a erpendicular and the length comes out to be h cos@ now i want to know the ...

In details of 10+2 field, do I fill the Month and Year of my 10th boards(March 2008)? School would obviously be the school I go to, and board CBSE... Subjectwise Marks of 10+2 = Marks of 10th board? ...

A thin horizontal uniform rod AB of mass m and length l can rotate freely about a vertical axis passing through its end A. At a certain moment the end B starts experiencing a constant force F which is always perpendicular to ...

For the reaction 2HI(g)[eq]H2(g)+I2(g) equilibrium constant is 25 at 500K. 1 moles HI is added to the system, the value of equilibrium constant at same temp. is ...

An aqueous solution of a given salt was made alkaline with solid NH4cl and NH4OH solution. H2S gas was then passed through the test tube. A black precipitate appeared. Which of the following conclusions is most appropriate ab ...

The elogation in spring 1 just after breaking spring2 A) mg/k B) 2mg/k C) mg/2k D) none *Image* ...

f; R--> R f(x) = {x + √5 , x εQ {√5- x , x εQc , THEN f is A) one-one & onto B) one-one and into C) many-one & onto D) many-one and into ...

An engineer works at a plant out of town. A car is sent for him from the plant everyday that arrives at the railway station at the same time as the train on which he comes. One day he arrives at the station one hour before an ...

STATEMENT--1 The minimum distance between the parabola y2 = 4x and the circle x2 + y2-54y +704 0 is √522. STATEMENT--2 Shortest distance between two non intersecting curves occurs along the common normal. ...

Let A≡(9,6), B(4,-4) be two points on parabola Y2=4x and P(t2,2t), tε[-2,3] be a variable point on it such that area of ΔPAB is maximum, then point P will be A) (4,4) B) (3,-2√3) C) (4,1) D) (1/4,1) ...

Coefficient of X6 IN *Image* is (A)26 (B)28 (C)30 (D)35 ...

Let PQRS be a rectangle of size 9X3,if it is folded along QS such that plane PQS is perpendicular to plane QRS and point R moves to point T. If θ is angle between the line QP and QT then tanθ is equal to A) 3/10 B) 10/3 C) ...

find dy/dx at x=0, y=(x-1)/(x3+x2+x+1) ...

Number of common points for the curves *Image* and *Image* is (where[.] denotes greatest integer function) (a)0 (b)1 (C)3 (D)none of these ...

A certain amount of ideal monoatamic gas undergoes, process given by UV1/2 = C where U is the internal energy of the gas. The molar specific heat of the gas for the process will be (c=constant) A) R/2 B) 3R C) 5R/2 D) -R/2 ...

A wire fixed at one end suffers extension when loaded at the other end. The linear strain is 4 x 10-3. The wire also suffers contraction in the radial direction. If the ration of radial strain to linear strain is 0.2. The per ...

*Image* ..please check dis one... ...

draw the graph of sin(ex) ...

The following question contains ONE OR MORE correct answer A glass prism is immersed in a hypothetical liquid. The graph shows the variation of refractive index of glass and liquid with the wavelength of light. When a ray of ...

STATEMENT_1 consider the arrangement shown in figure. A smooth conducting rod, CD, is lying on a smooth U - shaped conducting wire making good electrical contact with it. The U -shape conducting wire is fixed and lies in hori ...

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Two persons A nad B, each carrying a source of sound of frequency 600 Hz are standing a few meters apart in a quiet field. The beat frequency heard when A moves towards B with a velocity of 3 ms-1 ( velocity if sound is 340 m ...

The following question contains ONE OR MORE correct answer The power dissipated in resistor is 15W. The reading of ammeter and voltmeter are 500mA and 10V respectively. Ammeter, voltmeter and battery are ideal *Image* (A) the ...

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2 moles of an ideal diatomic gas are in the cylinder at temperature T. Suppose on supplying heat to the gas its temperature remains constant but' n ' moles get dissociated into atoms. IF heat supplied to the gas is 0.25 RT, t ...

Let y = [ √x ] x x x x x. . . . . . ( infinite times ) Find dy/dx in terms of x , y , log y and log x and no other variable. ...

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