Q. The half life period of a first order reaction is given by (where, K = rate constant. )

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Q. Half life period of a chemical reaction is

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Q. In the gaseous phase ammonia formation reaction (N₂ + 3H₂ ↔ 2NH₃), the value of the equilibrium constant depends on the

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Q. Which of the following is a controlling factor in very fast heterogeneous reaction ?

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Q. Enzymes are destroyed, when the

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Q. For an autocatalytic reactor, the suitable reactor set up is

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Q. Ionic reactions occur in

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Q. Sometimes, batch process is preferred over continuous process, when the product

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Q. The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k) is

(Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100 kJ/kmole. K (may be assumed to be independent of temperature))

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Q. Which of the following is not a theory of homogeneous reaction?

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Q. In a semi-batch reactor,

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Q. Most important characteristics of gas-liquid reactors are the

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Q. Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction ?

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Q. If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is

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Q. A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is - 1 kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50 J/mole.K. The temperature rise after a conversion of 0.5 will be

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Q. A photochemical reaction is

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Q. Photochemical reaction rate does not depend significantly on temperature, because

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Q. 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:

Cᴀ₀ = 5 kmole/m³ ; Xᴀ = 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

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Q. According to the 'law of mass action', the rate of reaction is directly proportional to the

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Q. In a chemical reaction, __________ are conserved.

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