This set of Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Material Balance without Reaction-I”.
1. A membrane is used to separate gases from waste. If the feed stream contains 20% CO2 and 80% SO2, and the waste stream amounts to 80% of the input stream, what is the composition of CO2 in the waste stream?
a) 0.1875
b) 1.1685
c) 0.1485
d) 0.1285
View Answer
Explanation: The composition of CO2 in the waste stream is determined by performing mole balances for the gases based on the given input and output streams.
2. In a separation process where a membrane separates gases, the feed stream contains 80% SO2 and 20% CO2, with a product stream containing 25% CO2 and 75% SO2. If the waste stream is 80% of the input, what is the composition of SO2 in the waste stream?
a) 0.8175
b) 0.8165
c) 0.8145
d) 0.8125
View Answer
Explanation: The composition of SO2 in the waste stream is calculated using mole balances on the given input and output streams.
3. Below given statements for distillation is
In distillation, a liquid mixture is boiled to produce a vapour of different composition that moves away from the liquid.
a) True
b) False
c) Partially correct
d) None of the mentioned
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Explanation: In distillation, a liquid mixture is boiled to produce a vapour of different composition that moves away from the liquid.
4. In a distillation column process, a feed of 1000 kg is separated into 80% product and 20% waste. The feed contains 20% Acetone and the remaining portion is Water. How much Acetone is present in the waste stream?
a) 20 kg
b) 40 kg
c) 60 kg
d) 80 kg
View Answer
Explanation: By applying a mass balance for each component, the amount of Acetone in the waste stream is calculated to be 40 kg.
5. In a distillation column process with a feed of 1000 kg containing 80% Water and 20% Acetone, 20% of the feed exits as waste. What are the moles of Water in the waste stream?
a) 4.45
b) 8.89
c) 16.67
d) 20.48
View Answer
Explanation: Using the mass balance for each component and converting Water mass to moles, the moles of Water in the waste stream are calculated to be 8.89 moles.
6. Correct statement for a tie component in material balance is
a) Enters a process in only one stream
b) Leaves in only one stream
c) Does not react inside the process
d) All of the mentioned
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Explanation: A tie component full-fills a, b, c all three conditions.
7. In a drying process involving a material called SRU, the mass balance for component A in the process is determined. What is the mass of component A in kg?
a) 1666.67
b) 2666.67
c) 3666.67
d) 4666.67
View Answer
Explanation: The mass balance calculation for component A in the SRU drying process results in 2666.67 kg.
8. In a drying process involving a material called SRU, the mass balance for component B in the process is determined. What is the mass of component B in kg?
a) 666.67
b) 566.67
c) 466.67
d) 366.67
View Answer
Explanation: The mass balance calculation for component B in the SRU drying process results in 666.67 kg.
Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.
