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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Q. For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant

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Q. With increase in temperature, the equilibrium __________ rises in case of endothermic reaction.

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Q. Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in

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Q. Considering the endotheomic dissociation of CaCO₃ in a closed vessel (CaCO₃ ↔ CaO + CO₂), the pressure of CO₂ increases, if

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Q. During manufacture of H₂SO₄, the oxidation of SO₂ to SO₃ by oxygen is an en-dothermic reaction. The yield of SO₃ will be maximised, if the

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Q. The role of a catalyst in a chemical reaction is to change the

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Q. The vessel dispersion number (D/μL) for plug flow is

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Q. Molecularity of a reaction

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Q. BET apparatus is used to determine the

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Q. A balanced chemical reaction equation conforms to the law of

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Q. An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.

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