Recently Active Questions

*Image* for c=r,q d=p,q hoga na!!!!!!!! ...

*Image* i think b shud be answer but ans. given is different ...

The pink violet colour of KMnO4 is due to: (a) d-d transition (b) p-d transition (c) charge transfer (d) Both (a) & (c) ...

If f(x) is continuous function and attains only rational values. If f(0) = 5, then roots of the equation (f(0))x2 + f((5))x + f(3) = 0, are 1. Real and equal 2.Real and unequal 3. Non-real complex cubic roots of unity 4. Irra ...

*Image* i m finding only two geometrical isomers! :( ...

NH3 has much higher boiling point than PH3 because ...

Calculate number of geometrical isomers of complex [Cr(NH3)3Cl3] ? ...

Ammonia reacts with excess chlorine to form ...

A lens of focal length 15 cm is dipped in water. What is the new focal length given that ref index of glass wrt air is 3/2 and that of water wrt air is 4/3. If the lens is dipped in a liquid under what condition, the rays are ...

Co-ords. of centre of circle which bisects the circumferences of the circles : x2+y2 = 1 ; x2+y2+2x-3=0; x2+y2+2y-3 = 0 is : A) (-1,-1) B) (3,3) C) (-2,-2) D) (2,2) Ans : (-2,-2) ...

Prove that for any triangle inscribed in a rectangular hyperbola its orthocenter also lies on that same rect hyperbola ...

Let PQ specified by the equation x + y = 3 3 be a chord to the circle x2+y2=27. If the point R moves on the circle, then the locus of centriod of triangle PQR is a circle, the square of whose radius is - ...

Atomic radii of fluorine and neon in Angstrom units are respectively given by A. 0.72,1.60 B. 1.60,1.60 C. 0.72,0.72 D. None of these. If we dont know the exact values,should we go for option A although there is an option lik ...

From a pt perpendicular tangents are drawn to the ellipse x2+2y2=2.The chord of contact touches a circle which is concentric with the given ellipse.Find the ratio pf maximum and minimum area of circle?? ...

*Image* Magnetic field is inside the plane of paper and increasing with time. Four diiff. shaped conductors PQR are placed as shown. In which figure Potential at point P will be greater than potential at R? ...

*Image* Here sequence of X and Y will be 1. X-Cl, Y-Br 2. X-F, Y-Cl 3. X-Cl, Y-F 4. All of these may correct USE UR MAGNIFIERS PLZZZ ...

(NOT MY DOUBT---) *Image* ...

How many sp3 hybridised atom in (SO3)3 solid? ...

Q1) a uniform meter scale of weight 50gram force is balanced at 40cm mark when a weight of 100 gram force is suspended at the 5cm mark were must the weight of 80 gram force be suspended to balance the meter scale. Q2) a unifo ...

Q1. If the curves y=f(x) and y=g(x) intersect each other orthogonally at some point P, then at P (a) f and g may be increasing (b) f and g may be decreasing (c) f and g may have opposite monotonity (d) NOT Q2. A/R Statement 1 ...

Which of the following compounds is expected to be coloured ? A. Ag2SO4 B CuF2 C. MgF2 D. CuCl have doubt b/w B n D ...

If 'I' is the intensity of absorbed light and 'C' is the concentration of AB for the photochemical process, AB + hμ ------>AB*, the rate of formation of AB* is directly proportional to A. C B. I C. I2 D. C.I ...

there is a ellipse which is rotated about the axis to form an egg-like structure......a quarter of the egg is cut. We have to find out the centre of mass of the one-fourth egg...... ...

Q1. Two concentric shells of radius R and 2R, out of which the inner shell is having a charge Q and the outer shell is uncharged. If they are connected with a conducting wire, then (a) Q amount of charge will flow from inner ...

Stmnt 1: LiCl is predominantly a covalent compound Stmnt 2: Electronegativity difference between Li and Cl is too small (IIT 1998) ...

* GOT THE ANSWR ** ...

limx→π/2 (sinx - sinxsinx)/(1-sinx+lnsinx) ...

If the line y- 3 x+3=0 cuts the parabola y2=x+2 at A and B,then PA.PB is equal to (P≠( 3 ,0) Solution as in book (y-0)/( 3 /2)=(x- 3 )/(1/2)=r On solving with y2=x+2 3r2/4 = r/2 + 3 +2 PA.PB=|r1r2| = (4( 3 +2))/3 ...

If y1,y2 are the ordinates of the two points P and Q on the parabola and y3 is the ordinate of the point of intersection of tangents at P and Q,then y1,y2,y3 are in AP.Prove ...

*Image* Out of following which is most reactive towards electrophilic substitution reaction? USE UR MAGNIFIERS PLZZZZZZZZZ ...