Chemical Industry Questions and Answers – Inorganic Chemical – Oxygen and Nitrogen

This set of Chemical Industry Multiple Choice Questions & Answers (MCQs) focuses on “Inorganic Chemical – Oxygen and Nitrogen”.

1. What is the molecular weight of Oxygen?
a) 30
b) 31
c) 32
d) 33
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2. What is the molecular weight of Nitrogen?
a) 25
b) 26
c) 27
d) 28
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3. Which of the mentioned purposes uses High purity oxygen?
a) Welding and cutting of metals
b) Open hearth steel purification
c) Medicinal purposes
d) All the mentioned
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4. Which oxygen is used for blast furnace operations?
a) High purity oxygen
b) Low purity oxygen
c) Atmospheric oxygen
d) Liquid oxygen
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5. Which of the mentioned gas is used as protective atmosphere to prevent oxidation in metalworking and food preservation?
a) N₂
b) O₂
c) H₂
d) CO₂
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6. Refrigeration by Joule-Thomson cooling is termed as which of the mentioned cycles?
a) Linde
b) Claude
c) Newton
d) None of the mentioned
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7. Refrigeration by adiabatic expansion of compressed air in a rotating expansion machine is termed as which of the mentioned cycles?
a) Linde
b) Claude
c) Newton
d) None of the mentioned
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8. What type of oxygen is used for oxidation of hydrocarbons?
a) Low purity oxygen
b) High purity oxygen
c) Atmospheric oxygen
d) Liquid oxygen
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9. How much percentage of oxygen is present in High purity oxygen?
a) 90.5
b) 93.5
c) 95.5
d) 99.5
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10. What is the boiling point of nitrogen?
a) -190 Celsius
b) -192 Celsius
c) -195.8 Celsius
d) -200 Celsius
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