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1) on introducing a catalyst at 500k the rate of 1st order reaction increases by 2 times. the activation energy in the presence of a catalyst is 5 kj/mol. then what will be the Ea in the absence of the catalyst.? a)9.6 kj/mol ...

1.. 1-x2 + 1-y2 = a(x-y) then dy/dx is a) (1-x2)/(1-y2) b) (1-y2)/ (1-x2) c) ( 1-x2)/(1-y2 ) d) 1-y2)/ (1-x2) 2. If y= cosec x (cot–1x) thendy/dx a. x/ 1-x2 b) -x/ 1+x2 c) x/ 1+x2 d) None 3. The tangents to the circle x2 + ...

The exponential function ex is strolling along the road insulting the functions he sees walking by. He scoffs at a wandering polynomial for the shortness of its Taylor series. He snickers at a passing smooth function of compa ...

The path of one projectile as seen from others is a straightline. IF UR ANS> IS TRUE OR FALSE please with sufficient explanation mention how ...

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Prove that \left(a^{\alpha} +b^{\alpha } \right)^{1/\alpha }<(a^{\beta }+b^{\beta })^{1/\beta } when a>0,b>0 , \alpha >\beta >0 ...

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The critical temp of water is higher than O2 becoz H2O molecule has a)fewer e than O2 b)two covalent bonds c)V shape d) dipole moment ans given is c only...but it should be both c,d naa ? ...

A steady currentflows in metallic conductor of non uniform crossection.Quantity which are constant along length opf wire a)drift speed b)current ans is curent but how cna it be true becoz I=ne2AEÏ„/m ...

soln of (dy/dx)2-xdy/dx+y=0 in solns they have solved using options...but is there a direct soln ?? ...

y1=A(cos0.5Ï€x-100Ï€t) y2=A(cos0.46Ï€x-92Ï€t) Q Speed of sound my doubt is that cna we calulate speed of sound dorectly using any of waves or should be write superimposed eqn first and then do claculation part ?? thouggh in t ...

Does n! = the integral from 0 to infinity of (x^n)(e^-x)dx hold true for all real numbers? If so, can we find the derivative of n!? ...

Prove that line x=ay+b, z=cy+d and x= a'y+b', z=c'y+d' are perpendicular if aa'+cc'=-1( edited) ...

open pipe is in resonance in 2nd harmonic with frequncy f1.Now one end is closed and frequncy is increasd to f2 such taht resoance is in nth harmonic.Find n and relation b/w f2 and f1 ...

no. of distinct real roots of f"(x) if f(x)=(x-1)25(x-2)43(x-3)11 ...

what is Isocyanide andd what is the difference between cyanide and isocyanide!! please reply soon!!:-| ...

What is the structure of an IMIDE??? what prefix and suffixes are used while naming a compound with the group IMIDE??? ...

I have not yet started a single word in INORGANIC!! neither have i bought any books!! so again same question!! WHICH BOOKS TO FOLLOW??? ...

Assuming 200 MeV of energy is released for fission of Uranium atom , find the number of fissions per second required to realease 10 kilowatt power. ...

THIS REMAINS ONE OF MY GREATEST DOUBTS Integrate e x cos a da . ...

In a simple fixed pulley system, two unequal masses m1 and m2 are connected by a light string passing over a light fixed pulley. the larger mass is stopped for a momment 2 secs after the system is set into motion. Find the ti ...

Arrange thse lewis acids in odere of strength FeCl3 ZnCl2 SnCl2 AlCl3 BF3 H+ ...

300g of water at 25C is aded to 100g ice at OC.Final temp of mix is ?? ...

1) Are dyes there in JEE syllabus? 2) Is Coni's Rotation method (C.N) der in syllabus? ...

1. what type of waves are used in: a)photography in fog b)detecting crystal structure 2.A solution of Na in liquid ammonia at -33°C conducts electricity. On cooling the conductivity of this _______. 3.what are the reactions ...

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OUTLINE ALL STEPS INVLOVED IN SYNTHESIS OF HC *Image* C- CHO FROM ACROLEIN ...

1..why Hcl and HI do not form radicals easily ????????????? ...

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