Moles,Density and Concentration MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Moles,Density and Concentration, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Moles,Density and Concentration 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 Moles,Density and Concentration mcq questions that explore various aspects of Moles,Density and Concentration problems. Each MCQ is crafted to challenge your understanding of Moles,Density and Concentration principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Moles,Density and Concentration MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

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Moles,Density and Concentration MCQs | Page 8 of 10

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Q71.
A mixture contains 80% of NaOH and 20% H₂O by weight, what is the mole fraction of NaOH?

a.

0.24

b.

0.42

c.

0.64

d.

0.78

Discuss
Answer: (c).0.64
Q72.
A compound contains 40% of Sulphur and 60% of Oxygen, what is the empirical formula of the compound?

a.

SO₂

b.

SO₃

c.

SO₄

d.

None of the mentioned

Discuss
Answer: (b).SO₃
Q73.
A liquid mixture composed of 20% CH₄, 30% C₂H₄, 35% C₂H₂, and 15% C₂H₂O. What is the average molecular weight of the mixture?

a.

20

b.

25

c.

6.75

d.

9.25

Discuss
Answer: (b).25
Q74.
A gaseous mixture composed of 20% CH₄, 30% C₂H₄, 35% C₂H₂, and 15% C₂H₂O. What is the average molecular weight of the mixture?

a.

20

b.

25

c.

6.75

d.

9.25

Discuss
Answer: (c).6.75
Q75.
The mole percent of H₂ and N₂ in a mixture is 50% each, what is the mass percentage of H₂?

a.

12.5

b.

25

c.

50

d.

87.5

Discuss
Answer: (a).12.5
Q76.
The mole percent of CO₂ and H₂O in a mixture is 40% and 60% respectively, what is the mass percent of CO₂?

a.

24.1

b.

47.2

c.

61.9

d.

78.5

Discuss
Answer: (c).61.9
Q77.
A mixture contains 20% CO₂, 30% SO₂ and 50% H₂O, what is the mass percent of CO₂?

a.

23

b.

45

c.

66

d.

87

Discuss
Answer: (a).23
Q78.
A mixture contains 20% NaCl, 30% CH₄ and 50% H₂O, what is the mass percent of NaCl?

a.

21

b.

34

c.

45

d.

68

Discuss
Answer: (b).34
Q79.
A mixture contains 10% CO, 40% CO₂ and 50% H₂O, what is the mass percent of CO₂?

a.

9.5

b.

15.4

c.

39.5

d.

74.1

Discuss
Answer: (a).9.5
Q80.
Which of the following is not the unit of concentration?

a.

Mole/m³

b.

Molar

c.

N/m³

d.

ppm

Discuss
Answer: (c).N/m³
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