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Q) for a reaction activation energy = 0 and k= 3.2 s-1 at 300 K. the value of k at 310K = ? doubt: does activation energy vary with temperature.so wats the answer ...
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An acid-base indicator (ka = 3 * 10-5 ) has red colour in acid form and blue colour in basic form . which is/are correct statements; (A) 75% red form will exist at pH = 4.05 (B) indicator will show red colour at pH = 3.53 (C) ...
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out of the following compds. all atoms are in one plane are; (A) c=c-c=c (B) c≡c-c=c (C) c=c=o (D) c=c=c (add hydrogens wherever necessary) ans = B,C JEE 2011 Q. how to do such Questions? ...
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in the iodoform reaction of ethanol , the number of moles of base (naoh) consumed per mole of ethanol is? ans: 5 (how?) ...
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multi correct; in non uniform spherical shell of mass 'm' and radius R (here E is gravitational intensity) which of the following are wrong; (A) E = 0 (r<R) (B) ∫ E.dS = 0 on any closed surface inside the shell (C) E can ...
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a square loop PQRS of side 'L' is placed near an infinite current( i ) carrying wire in the same plane at a distance 'L'. now the loop is rotated about side PS by 90° . find the charge which passes through any point of the l ...
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in a hypothetical atom, potential energy beteen electron and proton at distance 'r' is given by ( -ke2/4r3 ) where k is constant . suppose bohr model is valid and n is principal quatum number , then total energy is proportion ...
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for a liquid normal boiling point is 351 K statement: at 351 K and 2 atm pressure , change in gibbs energy ΔG is positive. true or false? and why ...
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multi correct A neutron collides head on with a stationary hydrogen atom in ground state.Which of the following are correct( take mass of neutron ≈ hydrogen) A) if kinetic energy of neutron is less than 13.6 eV , collision ...
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at 300K vapour pres. of pure benzene and pure tolune are 100mm and 30mm of Hg rep. also they form ideal soln.a soln. of benzene and tol. is prep. by mixin 3 mole of tolun in 2 moles of benz. at 300K. 1)at wht external pressur ...
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1) A spectroscopic instrument can differntiate 2 close wavelengths λ and λ+Δλ if λ/Δλ = 8000. The instrument is used to study spectral lines of balmer series of hydrogen. find approx how many lines are distinguished by ...
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bleaching powder reacts with iodide ion according to the following unbalanced equation OCl- + I- + H+ --------> I2+Cl- + H2O A 0.6 gram sample of bleaching powder requires 35.24 ml of 0.1084 N Na2S2O3 to titrate the libera ...
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the relative humidity of air at any day is 50% and saturation vapuor pressure at 300K is 3.6 kPa. the amount of water vapours pers litre of air at 300K is? ...
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how do we infer which of the following disproportionate in aqueous solution; NO2 , N2O5 , N2O3 , Cl2O6 , ClO2 , Cl2O7 , SO2 , SO3 , P4O10. ...
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x/a + y/b + z/c = 1 intersects the coordinate axes at A,B,C. if triangle PQR has mid points A,B,C then which of the following is/are true ; 1)ar(triangle PQR) = 2 √(a2b2+b2c2+c2a2) 2) foot of normal to triangle AC from O is ...
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p(x) = x5 + x2 +1 have roots x1 , x2,x3,x4,x5. g(x) = x2-2. then the value of g(x1).g(x2).g(x3).g(x4).g(x5) - 30g(x1.x2.x3.x4.x5) is ? ...
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I'm unable to see any image on tiit. happening since 3 days..anyone else facing the same problem? @nishant bhaiyya pls reply ...
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1) what is the hybridisation state of central atom in the cationic part of the solid form of XeF6? (A) sp3 (B) sp3d2 (C) sp3d (D) dsp2 [please don't google. i have the answer but didn't get it myself..so jus wanted to check h ...
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The circle x^2+(y-4)^2 = 25 intersects x-axis at points A and B . a point p lies on the major segment of the circle . the bisector of the angle APB for any point p can be given by the equation is? answer = y = mx - 1 ...
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my ans is not matching.. *Image* ...
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*Image* specifics ; radius = 5 cm u (coeff) = 0.8 ...
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The smooth circular pipe is kept fixed in a horizontal plane . If mass m with charge +q is slightly displaced from the position shown then the distance travelled by the ball when the magnitude of normal reaction becomes minim ...
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2) find the position coordinates of the image of the object *Image* P as seen through the periscope. The mirrors are inclined at 45 degrees with the x-axis and eye is placed at the level y = -d . answer (3d,-d) ...
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Two conducting rings 'P' and 'Q' of radius 'r' and '3r' move in opp. directions with velocity '2v' and 'v' respectively on a conducting surface. there is a uniform magnetic field of magnitude 'B' perpendicular to plane of rin ...
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initially the system is held at rest nd spring is in natural length. friction between disc nd ground is sufficient to prevent slipping. now system is released frm rest position. 1) the min. coeff. of friction reqd. to prevent ...
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*Image* mass of rod = 30 kg length = 0.8 m is free to rotate about horizontal axis 'O' passing through its centre. a particle p of mass = 11.2 kg falls vertically through a height h = 36/245 m and collides elastically with th ...
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*Image* i know the answer. so please give the steps. ...