Q. Diffusion co-efficient in molecular diffusion is estimated by _________

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Q. Find the total flux for a particle A and B in a steady state if flux of A and B is 2.44 and 4.44 mol/sq.m sec.

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Q. Find the flux of A ( xA= 0.2) if Total flux is 5 mol/sq.m sec and J flux of A is 2 mol/sq.m sec.

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Q. Find J flux of A ( xA = 0.5) if the total N flux is 6 mol/sq.m sec and N flux of A is 3 mol/sq.m sec.

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Q. Diffusivity of the liquids can be determined by

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Q. For the molecular diffusion of liquids, if the diffusing molecules having criteria of steady state diffusion of B over non diffusing A then the N flux of A is

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Q. For liquid molecular diffusion of A and B, steady state equimolar counter diffusion the N flux of A is negative of N flux of B.

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Q. Find the change in concentration for a steady state equimolar counter diffusion if D(AB)= 6 sq.m/sec, the change in distance is 2 m and the N flux of A is 5 mol/sq.m sec.

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Q. Find the diffusivity of AB in sq.m/sec if N flux of A 5 mol/sq.m sec, concentration difference is 2mol/cu.m and distance is 3 m.

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Q. __________ energy helps for molecular diffusion.

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Q. For two particles at steady state collision of A and B, J flux of A is 2 mol/sq.m sec, find the J flux of B.

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Q. Estimate the mole fraction if concentration of A is 2 mol/cu.m and the total concentration is 5 mol/cu.m.

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Q. Find the partial pressure of A if the total pressure is 2 atm; Concentration of A is 2 mol/cu.m and total concentration is 5 mol/cu.m.

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Q. From the reaction, Methane –> Carbon + 2(Hydrogen molecule), find the ratio of N Flux of A to the Total N flux( A+B); Given N Flux of B =-2 N flux of A.

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Q. For a Steady state diffusion of A through Non- diffusing B. N flux of B= ______

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Q. The value of N flux of A under steady state non-diffusing B with diffusing A is _________

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Q. If the value of N flux of A to the total N flux is 1 then it is a steady state diffusion of non-diffusing B.

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Q. In respect to free convection over a vertical flat plate, the Nusselt number for laminar and turbulent flows varies respectively with Grashoff number G ᵣ as

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Q. Experimental results indicate that the local heat transfer coefficient h g for flow over a flat plate with an extremely rough surface is approximated by the relation

hₓ = a x -0.12

Where a is a constant coefficient and x is distance from the leading edge of the plate. What is the relation between this local heat transfer coefficient and the average heat transfer coefficient for a plate of length x?

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Q. For the free convection circumstances, the following dimensionless numbers apply

(i) Grashof number
(ii) Prandtl number
(iii) Nusselt number

Identify the correct answer.

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