31402. In the gaseous phase ammonia formation reaction (N2 + 3H2 2NH3), the value of the equilibrium constant depends on the
31403. Transition state theory relates the above quantities as
31404. Photochemical reaction rate does not depend significantly on temperature, because
31405. A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m3 ; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min-1 ; (ΔH) = - 40kJ/mole; ρ = 1000kg/m3 CP = 4 J/gm.°C ; q = 10-3 m3/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is
31406. According to the 'law of mass action', the rate of reaction is directly proportional to the
31407. In a chemical reaction, __________ are conserved.
31408. For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant
31409. In the reversible reaction of the type, A + B AB, in general
31410. A batch reactor is
31411. For an isothermal second order aqueous phase reaction, A B, the ratio of the time required for 90% conversion to the time required for 45% conversion is
31412. A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)
31413. Second order consecutive irreversible reactions were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2)?
31414. What is a smart card with embedded chip,having multiple payment option?
31415. There is no correspondence between stoichiometry and the rate equation in case of a/an __________ reaction.
31416. A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?
31417. Which of the following is used for calcination of limestone and dolomite in industrial practice ?
31418. An imbalanced chemical reaction equation is against the law of
31419. For the chemical reaction P Q, it is found that the rate of reaction doubles as the concentration of 'P' is doubled. If the reaction rate is proportional to Cpn, then what is the value of 'n' for this chemical reaction ?
31420. Which of the following is a characteristic of an ideal plug flow reactor ?
31421. Velocity of a reaction depends upon the
31422. Threshold energy in a reaction is equal to the
31423. An isothermal aqueous phase reversible reaction, P R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is
31424. Design of heterogeous catalytic reactor involves consideration of __________ steps.
31425. A consecutive reaction, , is characterised by
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