Recently Active Questions

1)Which one is a stronger acid- o- Toluic acid or p- Toluic acid? 2)Why is ortho nitro aniline less basic than para nitro aniline? ans1) I think its p- Toluic acid because o- Toluic acid has more +I effect than p- Toluic acid ...

A cone made of insulating material has total charge Q spread uniformly over its sloping surface. Calculate the work done in bringing a small test charge q from infinity to the apex of the cane. The cone has a slope length L. ...

A mixture of 90 mole % of H2and 10 mole % D2 at 298 K and a total pressure of 1 atm is allowed to effuse through a small orifice of area 0.3mm^2.Calculate composition of the initial gas that passes through. ...

An ice cube of side l=20cm is floating in a tank (base area=50cmx50cm) partially filled with water.Dendity of water is 1000kg/m^3 and that of ice is 900kg/.m^3 .Calculate the increase in gravitational potential energy when ic ...

A. *Image* Then: (One or more may be correct) 1.) T = 5 N 2.) T = 10 N 3.) T' = 5 N 4.) T' = 0 B. *Image* Weight of sphere = W and a force P is applied on its surface to attain equilibrium (Friction is present). Then 1. Pmin ...

a particle moves on the path y= sinx with constant speed u. what will be its acceleration at x= π/2 ...

a metal sphere of radius R is charged to potential V. a) find the electrostatic energy stored in electric field within a concentric sphere of radius 2R . b) show that the electrostatic energy stored outside the sphere of radi ...

COSθ=COSα-COSβ/1-COSαCOSβ. THEN TAN2(θ/2).TAN2(β/2)=? PLEASE GIVE A DETAILED SOLUTION. ...

A particle of mass m collides oblically with another particle of mass 2m initially at rest. Both the particles have same diameter at the instant of collision velocity of 1st particle is making an angle of pie/3 with the line ...

balance the reactions: (i) SO2 + Na2CrO4 + H2SO4 → Na2SO4 + Cr2(SO4)3 +H2O (ii) C2H5OH + I2 + OH- → CHI3 + HCO2- + H2O + I- I am facing the same problem in both the reactions for eg taking (i) reaction step I S4+ → S6+ ...

*Image* Determine the equivalent capacitance between a and b. Each of the capacitor has capacity C. ...

hey guysss....hw ws your test? hw much are you all expecting??(at least those who gave it)..welll i cud not revise much yaar...so managed to score around 160 only :( :(...but the paper was good..(physics was indeed very diffi ...

1.in geometrical isomers,why boiling point is directly proportional to dipole moment? and why melting point directly proportional to intermolecular area of contact? 2. *Image* i understand that the above compounds are dissyme ...

hey friends i 've a doubt in HCV Newton laws of motion in "Questions for short answers" section...... i m sorry but image uploading is not working on the system.... Q. no. 8; fig 5-Q1 th equestion is the figure which is depic ...

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Tangent is drawn at any point(p,q) on the parabola y^2=4*a*x, Tangents are drawn from any point on this tangent to the circle x^2+y^2=a^2, such that all the chords of contact pass through a fixed point ( r,s) then p,q,r,and s ...

1) Can SN1 reaction take place with E2 ? If yes, then when and why ? 2)What would be the effect of increasing solvent polarity on the rate of the given substitution reaction:- R------L+ → R+ + :L 3)Why phenyl halide is unre ...

Some things I found in Solomons which explain the mechanism of benzyne substitution.. *Image* *Image* So I was right initially about stability of carbanions. ...

1.In how many ways can 6 boys and 4 girls sit in a row so that no boy is between two girls? 2.How many five digits number divisible by 4 can be formed by digits 1,2,3,4 and 5 if the digits can be repeated in the same number? ...

plz giv the opening and closing rank of iits ...

*Image* above is a concave mirror with water filled up to height h as shown... take refractive index of water to be u .... take radius of curvature of concave mirror to be R ..... where should a point object on the principal ...

Came back from IIt -guwhati for there annual tech fest techniche participated in Technotholon. Technotholon an annual school level compition testing the participants ability 2 thnk out of the box opver 2 lakh participants and ...

only problems not theory! ...

Can anyone tell me what is the condition for a hyperbola and ellipse to interesect orthogonally ...

The sum and difference of two vectors are perpendicular to each other.What is the magnitude of individual vectors? ...

is laptop compulsory in iit and nits? ...

An elevator which can carry a maximum load of 1800 kg(elevator + passengers) is moving up with a constant speed of 2m/s.The frictional force opposing the motion is 4000 N.Determine the minimum power delivered by the motor to ...

*Image* A uniform solid sphere of mass m and radius R is kept on a long plank which is moving with acc. a= kt2 , where k = 1 m/s4 and t is time in seconds . There is no slipping b/w sphere and plank . The minimum value of coe ...

Can anyone explain the marks distribution, total marks, cut off in each section, overall cutoff. And which of these are to be attempted first? Any any other suggestions. ...

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