Engineering Questions with Answers - Multiple Choice Questions
Chemical Industry MCQ’s – Inorganic Chemical – Oxygen and Nitrogen
1 - Question
What is the molecular weight of Oxygen?
a) 30
b) 31
c) 32
d) 33
View Answer
Explanation: Atomic weight of Oxygen is 16, Therefore the weight of O2 molecule is 2(16) = 32.
2 - Question
What is the molecular weight of Nitrogen?
a) 25
b) 26
c) 27
d) 28
View Answer
Explanation: Atomic weight of Nitrogen is 14.Therefore the weight of N2 molecule is 2(14) = 28.
3 - Question
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
View Answer
Explanation: High purity oxygen is used for welding and cutting metals, open-hearth steel purification and medicinal purposes.
4 - Question
Which oxygen is used for blast furnace operations?
a) High purity oxygen
b) Low purity oxygen
c) Atmospheric oxygen
d) Liquid oxygen
View Answer
Explanation: Low purity oxygen is used for Blast furnace operations.
5 - Question
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
View Answer
Explanation: Nitrogen is used to prevent oxidation in metalworking and food preservation due to its inertness.
6 - Question
Refrigeration by Joule-Thomson cooling is termed as which of the mentioned cycles?
a) Linde
b) Claude
c) Newton
d) None of the mentioned
View Answer
Explanation: Linde cycle uses refrigeration by Joule-Thomson cooling.
7 - Question
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
View Answer
Explanation: Claude cycle obtains refrigeration by adiabatic expansion of compressed air in a rotating expansion machine.
8 - Question
What type of oxygen is used for oxidation of hydrocarbons?
a) Low purity oxygen
b) High purity oxygen
c) Atmospheric oxygen
d) Liquid oxygen
View Answer
Explanation: Low purity oxygen is used for oxidation of hydrocarbons into CO2 and H2O.
9 - Question
How much percentage of oxygen is present in High purity oxygen?
a) 90.5
b) 93.5
c) 95.5
d) 99.5
View Answer
Explanation: The composition of high purity oxygen is 99.5% O2 and 0.5% Ar.
10 - Question
What is the boiling point of nitrogen?
a) -190 Celsius
b) -192 Celsius
c) -195.8 Celsius
d) -200 Celsius
View Answer
Explanation: Boiling point of nitrogen is -195.8 Celsius.