Diffusion in Solids,Liquids and Gases MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Diffusion in Solids,Liquids and Gases, a fundamental topic in the field of Mass Transfer. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Diffusion in Solids,Liquids and Gases MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Diffusion in Solids,Liquids and Gases mcq questions that explore various aspects of Diffusion in Solids,Liquids and Gases problems. Each MCQ is crafted to challenge your understanding of Diffusion in Solids,Liquids and Gases principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mass Transfer tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Diffusion in Solids,Liquids and Gases MCQs are your pathway to success in mastering this essential Mass Transfer topic.

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Diffusion in Solids,Liquids and Gases MCQs | Page 3 of 8

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Q21.
__________ energy helps for molecular diffusion.

a.

Thermal

b.

Electrical

c.

Internal

d.

All of the mentioned

Discuss
Answer: (a).Thermal
Q22.
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.

a.

1

b.

2

c.

3

d.

None of the mentioned

Discuss
Answer: (d).None of the mentioned
Q23.
Estimate the mole fraction if concentration of A is 2 mol/cu.m and the total concentration is 5 mol/cu.m.

a.

0.2

b.

0.25

c.

0.4

d.

1

Discuss
Answer: (c).0.4
Q24.
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.

a.

0.2 atm

b.

0.4 atm

c.

0.6 atm

d.

0.8 atm

Discuss
Answer: (d).0.8 atm
Q25.
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.

a.

1

b.

-1

c.

2

d.

-2

Discuss
Answer: (b).-1
Q26.
For a Steady state diffusion of A through Non- diffusing B. N flux of B= ______

a.

0

b.

1

c.

2

d.

Infinity

Discuss
Answer: (a).0
Q27.
The value of N flux of A under steady state non-diffusing B with diffusing A is _________

a.

0

b.

Constant

c.

Infinity

d.

None of the mentioned

Discuss
Answer: (b).Constant
Q28.
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.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q29.
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

a.

G ᵣ and G ᵣ¹/⁴

b.

G ᵣ¹/² and G ᵣ¹/³

c.

G ᵣ¹/⁴ and G ᵣ¹/³

d.

G ᵣ¹/³ and G ᵣ¹/⁴

Discuss
Answer: (c).G ᵣ¹/⁴ and G ᵣ¹/³
Q30.
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?

a.

1.136 hₓ

b.

2.136 hₓ

c.

3.136 hₓ

d.

4.136 hₓ

Discuss
Answer: (a).1.136 hₓ
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