Chemical Process Calculation Questions and Answers – Mole and Molecular Weight – VIII

This set of Chemical Process Calculation Questions and Answers for freshers focuses on “Mole and Molecular Weight-VIII”.

1-10. A cylinder contains 8 gms of He, 40 gms of Ne and 80 gms of Ar. (Molecular weights of the components are 4, 20 and 40 respectively)
1. How many moles of He are there in the cylinder?
a) 1
b) 2
c) 4
d) 6
View Answer

Answer: b
Explanation: Number of moles = mass / molecular weight.

2. How many moles of Ne are there in the cylinder?
a) 1
b) 2
c) 4
d) 6
View Answer

Answer: b
Explanation: Number of moles = mass / molecular weight.

3. How many moles of Ar are there in the cylinder?
a) 1
b) 2
c) 4
d) 6
View Answer

Answer: a
Explanation: Number of moles = mass / molecular weight.
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4. What is the mole fraction of He?
a) 0.2
b) 0.4
c) 0.6
d) 0.8
View Answer

Answer: b
Explanation: Mole fraction = Moles of the component / Total moles.

5. What is the mole fraction of Ne?
a) 0.2
b) 0.4
c) 0.6
d) 0.8
View Answer

Answer: b
Explanation: Mole fraction = Moles of the component / Total moles.
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6. What is the mole fraction of Ar?
a) 0.2
b) 0.4
c) 0.6
d) 0.8
View Answer

Answer: a
Explanation: Mole fraction = Moles of the component / Total moles.

7. What is weight percentage of He?
a) 0.0225
b) 0.0425
c) 0.0625
d) 0.0825
View Answer

Answer: c
Explanation: Weight percentage = mass of the component / Total mass.
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8. What is weight percentage of Ne?
a) 0.3125
b) 0.4125
c) 0.5125
d) 0.6125
View Answer

Answer: a
Explanation: Weight percentage = mass of the component / Total mass.

9. What is weight percentage of Ne?
a) 0.225
b) 0.425
c) 0.625
d) 0.825
View Answer

Answer: c
Explanation: Weight percentage = mass of the component / Total mass.
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10. He, Ne, Ar all are
a) Inert gas
b) Reactive gas
c) Ideal gas
d) None of the mentioned
View Answer

Answer: a
Explanation: Weight percentage = mass of the component / Total mass.

Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation for Freshers, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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