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Q#1 Diffusion GATE CH 2024 MCQ +1 mark -0.33 marks

Consider the steady, uni-directional diffusion of a binary mixture of A and B across a vertical slab of dimensions 0.2m×0.1m×0.02m as shown in the figure. The total molar concentration of A and B is at \(100 mol m^{-3}\). The mole fraction of A on the left and right faces of the slab are maintained at 0.8 and 0.2, respectively. If the binary diffusion coefficient \(D_{AB} = 1 × 10^{-5} m^2 s^{-1}\)the molar flow rate of A in \(mol.s^{-1}\), along the horizontal x direction is

\(3×10^{−6}\)

\(6×10^{−6}\)

\(6×10^{−4}\)

\(3×10^{−4}\)

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