51. Batch process is preferred over continuous process, when the
52. 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
53. In case of physical adsorption, the heat of adsorption is of the order of __________ kcal/kg.mole.
54. Which of the following does not produce a change in the value of rate constant of a reaction?
55. For a gaseous phase reaction, rate of reaction is equal to K.CA.CB. If the volume of the reactor is suddenly reduced to $${\frac{1}{4}^{{\text{th}}}}$$ of its initial volume, then the rate of reaction compared to the original rate will be __________ times.
56. The rate of a gas phase reaction is given by K.CA.CB. If the volume of the reaction vessel is reduced to $${\frac{1}{4}^{{\text{th}}}}$$ of its initial volume, then the reaction rate compared to the original rate will be __________ times.
57. The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is
58. The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises form 10 to 100°C.
59. BET apparatus is used to determine the
60. The sequence in which three CSTR's of volumes 5, 10 and 15 m3 will be connected in series to obtain the maximum production in a second order irreversible reaction is
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