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For a chemical reaction A+B rarr Cit has been found that : (i) rate becomes double when the concentrations of A is doubled (ii) rate becomes 16 times when the concentrations of both A and B are doubled . The rate expression is :

Fora chemical reactionA +2B to Cif therateofdisappearanceof A is 0 .5mol dm^(-3)perhour, therateofdisappearanceof Bis

For a chemical reaction 2A+BiffC, the thermodynamic equilibrium constant K_(p) is

For a chemical raction AtoB the rate of the reaction is 2xx10^(-3) mol dm^(-3)s^(-1), when the initial concentration is 0.05 mol dm^(-3). The rate of the same reaction is 1.6xx10^(-2) mol dm^(-3)s^(-1) when the initial concentration is 0.1 mol dm^(-3). The order of the reaction is

For a chemical change AtoB, it is found that the rate doubles when the concentration of A is increased 4 times. The order in A is

For a chemical change 2A+3Brarr Product's the rates w.r.t. 'A' is r_1 and w.r.t. 'B' is r_2. The rates, r_1 and r_2 are related as

For a certain van der Waal's gas, critical temperature is-243^(@)C. Match the graphs (given in column-I) with the temperature of the gas (given in column-II).

for a certain reactions, large fractions of molecules has energy more than the threshold energy, yet the rate of reaction is very slow. Why?

For a certain reaction of order n, the time for half change, t_(1//2) is given by t_(1//2)=((2-sqrt2))/(k)xxC_(0)^(1//2) where k is constant and C_(0) is the initial concentration. What is n?

For a reaction (d x)/(d t) = K[H^(+)]^(n). If pH of reaction medium changes from two to one rate becomes 100 times of value at pH = 2, The order of reaction is

For a certain reaction large fraction of the molecules has energy more than the threshold energy, yet the rate of the reaction is very slow. Why?

For a certain reaction, large fraction of molecules has energy more than the threshold energy, yet the rate of reaction is very slow. Why ?

For a certain reaction large fraction of molecules has energy more than the threshold energy,yet the rate of reaction is very slow.Why?

For a certain reaction, DeltaH=-50 kJ and Delta S=-80JK^(-1), at what temperature does the reaction turn from spontaneous to non-spontaneous ?

For a certain reaction Delta H = -50 kJ and Delta S = -80 jK^(-1), at what temperature does the reaction turn from spontaneous to nonspontaneous?

For a certain reaction Ato products, the t_(1//2) as a function of [A]_0 is given as below: {:([A]_0(M),0.1,0.025),(t_(1//2),100,50):} Which of the following is true :

Fora certainreactionDelta H^(@) =- 224 kJand Delta S^(@) =- 153 JK Atwhattemperaturewill itchangefromspontaneous tonon-spontaneous ?

For a certain reaction, AH -50 kJ and AS -80JK, at what temperature does the reaction turn from spontaneous to non-spontaneous.

Fora certain reacation large fraction of molecules has energymorethanenergymore thanthethresholdenrgy,yettherate of reactionis very slow. Why ?

For a certain process, DeltaH=280 kJ and DeltaS=140 J K^(-1) "mol"^(-1) .What is the minimum temperature at which the process will be spontaneous?

For a certain process, DeltaH=178 kJ and DeltaH=160 J/K . What is the minimum temperature at which the process will be spontaneous ? Assume that DeltaH and DeltaS do not vary with temperature.

For a cell reaction involving a two electron change, the standrard emf of the cell is found to be 0.295V" at "25^(@)C. The equilibrium constant of the reaction at 25^(@)C will be:

For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25^@C . The equilibrium constant of the reaction at 25^@C will be

For a cell reaction involving a two-electron change, the standard emf of the cell is found to be 0.295 V at 25^@C. the equilibrium constant of the reaction at 25^(@)C will be

For a cell reaction, 2 "Ag"^(+)+Cu(s) rarr Cu^(+2)+2"Ag"(s) schematic diagram indicating migration of cation, anion and electrons is :

For a cell reaction2H_(2(g)) + O_(2(g))to 2H_2O_((l)) DeltaS_(298)^(@) = - 0.32 kJ // K . What is the value Delta_(i) H_(298)^(@) (H_2O, l) ? Given : O_(2(g)) + 4H_((aq))^(+) + 4e^(-) to 2H_2O_((l)) , E^(@) = 1.23 V

For a cell reaction , Cu^(2+) (C_1 , aq) + Zn(s) to Zn^(2+) (C_2 , aq) + Cu(s) of an electro chemical cell , the change in standard free energy , DeltaG^(0) at a given temeprature is

For a cell involving two electrons changes, E_(cell)^(@)=0.3" V" at 25^(@)C. The equilibrium constant for the reaction is :

For a cell given below: Ag|Ag^(+)||Cu^(2+)|Cu Ag^(+)+e^(-)toAg,E^(@)=x Cu^(2+)+2e^(-)toCu,,E^(@)=y ltbr. The value of E_(cell)^(@) is

For a cell involving two electron changes, E_("cell")^(@) =0.3V at 25^(@)C.The cell equilibrium constant of the reaction is

For a cell containing copper and silver electrodes , which of the following statements is correct ?

For a carnot engine, the source is at 500 K and the sink at 300 K. What is efficiency of this engine

For a calomel electrode , which of the following is 'FALSE' statement ?

For a binary liquid solution of A and B. P^(overset(0)A)= pure vapour pressure of A. P^(overset(0)H)= pure pressure of B. X_(A)= mole fraction of A in liquid phase. Y_(A)= mole fraction of A in vapour phase.

For a blue coloured solution obtained in column-2, select the only correct option.

For a binary ideal liquid solution, the variation in total vapour pressure versus compositionof solution is given by which of the curves ?

For a binary ideal liquid solution, the variation in total vapour pressure versus composition of solution is given by which of the curves ?

For a binary ideal liquid solution, the variation in total vapour pressure us composition of solution is given by which of the curves ?

For A+B to C in column-II the graphs given can be from any of these four types. (a)-(dA)/(dt) Vs time (x axis), (b)t_(1//2) Vs initial conc. (x axis) (c )((C_o-C_r)/C_t) Vs time (x axis) , (d) Conc. Vs time (x axis ) Match the graphs in Column-II for the given order of reactions in Column-I

For A+BtoC+D when [A] alone is doubled rate gets doubled but when [B] alone is increased by 9 times rate gets tripled. Then orders of reaction is

For A+B rarr C+D,DeltaH=-20 kJ mol^-1, The activation energy of the forward reaction is 85 kJ mol^-1. The activation energy for backward reaction is…….kJ mol^-1:

For a Ag -Zn button cell , net reaction is : Zn_((s) + Ag_2 O_((s)) to ZnO_((s)) + 2Ag_((s)) , DeltaG^(0)f (Ag_2O) = -11 . 21 kJmol^(-1)DeltaG^(0)F (ZnO) = -318 . 3 kJ mol^(-1) HenceE_("cell")^(0) of the button cell is :

For a 5% solution of urea (Molar mass = 60 g/mol), calculate the osomotic pressure at 300 K. [R=0.0821 " L atm K"^(-1)"mol"^(-1)]

For a A+Btoproduct,the rate law is given by r=k[A]^(1/2)[B]^2.What is the order of the reaction .

For a 1st order reaction log (a-x) is plotted Vs time, a straight line is obtained with slope

For a 1^(st) order reaction (gaseous) (constant V, T) : aAto(b-1)B+1 C(with bgta) the pressure of the system rose by 50(b/a-1) %in a time of 10 min. The half life of the reaction is therefore.

For a 1st order reaction log K is plotted against 1/T and, the slope of the line is -1.5xx10^2K. The activation energy for the reaction would be

For a 1st order reaction, the time required for 99.9% completion is

For a 0.1 M aqueous solution of a weak acis, HA (K_(a)=10^(-9)), the pH is approximately equal to