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Ficks laws of diffusion Quiz | Diffusion Theory: Ficks 1st Law

Ficks laws of diffusion Quiz | Diffusion Theory: Ficks 1st Law

This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Fick’s Law-1”. Fick\'s laws of diffusion Quiz This quiz allows you to check your knowledge regarding Fick\\\'s laws of diffusion. This quiz contains some basic question about Fick\\\'s laws. Before dive into the deep let me mention something about this important law. Fick\\\'s laws of diffusion described diffusion and were represented by Adolf Fick in 1855. They can be used to solve for the diffusion coefficient, D. It is well known that Fick\\\'s first law relates the diffusive flux to the concentration under the assumption of the steady state. While Fick\\\'s second law predicts how diffusion causes the concentration to change with respect to time. Fick\\\'s first law can be used to derive his second law which in turn is identical to the diffusion equation. The mathematics that governs the mass transport phenomena of diffusion is based on Fick\\\'s laws. The physiologist Adolf Fick first introduced his currently recognized laws governing the transport of mass through diffusive means. Fick\\\'s research was vastly inspired by the earlier experiments of Thomas Graham, which was not enough proposing the fundamental laws for which Fick would become famous. Fick\\\'s experiments which modeled on Graham\\\'s dealt with measuring the concentrations and fluxes of salt, diffusing between two reservoirs through tubes of water. It is considered that Fick\\\'s work primarily concerned diffusion in fluids, because at the time, diffusion in solids was not considered generally possible. Today, Fick\\\'s Laws form the core of our understanding of diffusion in solids, liquids, and gases. When a diffusion process does not follow Fick\\\'s laws, it is referred to as non-Fickian. Fick\\\'s laws of diffusion describe diffusion and were derived by Adolf Fick in 1855. They can be used to solve for the diffusion coefficient, D. Fick\\\'s first law can be used to derive his second law which in turn is identical to the diffusion equation.

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Quiz Questions And Answers

Molecules desire to spread as far from a membrane as possible

Iodine
Glucose
Oxygen
Starch

What is diffusion?

The movement of molecules through a semi-permeable membrane from an area of lower concentration to an area of higher c
The movement of molecules through a semi-permeable membrane from an area of higher concentration to an area of lower con
The movement of molecules across a semi-permeable membrane until there are equal amounts on each side of the membrane
Molecules desire to spread as far from a membrane as possible

The dimension of diffusion coefficient is given by

M L T -2
L 2 T -1
L T -1
M L -2 T

What is the molecular weight of Sulphur-dioxide?

84
74
64
54

Estimate the diffusion coefficient for ammonia in air t 25 degree Celsius temperature and one atmospheric pressure. For ammonia, Molecular weight = 17 Molecular volume = 25.81 cm3/

0.4880 cm2/s
0.3880 cm2/s
0.2880 cm2/s
0.1880 cm2/s

What is the value of Schmidt number for hydrogen?

0.23
0.22
0.21
0.24

What is the molecular volume of air at normal boiling point?

29.89 cm3/gm mole
39.89 cm3/gm mole
49.89 cm3/gm mole
59.89 cm3/gm mole

What is the molecular weight of ammonia?

31
53
29
39

What is the unit of diffusion coefficient?

m2
s
m2 s
m2/s

Fick’s law is given by the formula

N b = – D b c d C b/d x
N b = – 2 D b c d C b/d x
N b = – 3 D b c d C b/d x
N b = – 4 D b c d C b/d x
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Answer By: Dpk
Answer On: 27-Sep-2019

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