61. The value of $$\frac{{{{\text{N}}_{\text{A}}}}}{{{{\text{N}}_{\text{A}}} + {{\text{N}}_{\text{B}}}}},$$ for steady state equimolal counter diffusion of two gases 'A' and 'B' is
62. Which of the following is used for the concentration of rubber latex?
63. Reboiler is considered as one theoretical plate, because
64. Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in
65. Which of the following is not a continuous leaching equipment?
66. Pick out the wrong statement.
67. At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?
68. Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in
69. Which of the following mixtures does not form an azeotrope at atmosheric pressure?
70. With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.
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