Previous Year Questions
41 questions from past exams (2022–2025). Solve on paper, then check the related notes.
Showing 15 questions in Chemical Process Principles
20245 questions
- Q12024Mid Semesterhard6 marks
How will you differentiate unit processes from unit operations in chemical industries? Explain heat transfer operations and fluid flow operations in detail
Solve this question - Q22024Mid Semestereasy4 marks
a.Convert a heat transfer coefficient of 175 Btu/h·ft²·°F into W/m²·°C. (2 marks) b.What is the weight of one litre of propane at standard conditions? (2 marks)
Solve this question - Q32024Mid Semestereasy5 marks
a. An aqueous solution contains 18% ethyl alcohol by volume. Express the composition in weight % and mole %. The densities of ethyl alcohol and water are 790 kg…
Solve this question - Q42024Mid Semestermedium4 marks
When heated to 100 °C and 720 mm Hg, 19.2 g of N₂O₄ gas occupies 11450 cc. Assuming the ideal gas law applies, calculate the percentage dissociation of N₂O₄ to…
Solve this question - Q52024Mid Semesterhard6 marks
A furnace is designed to burn coke at 200 lb/h. The coke is 91.1% C and 8.9% ash. The grate efficiency is such that 90% of the carbon charged is burnt. Air is s…
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20235 questions
- Q12023Mid Semestermedium6 marks
How many types of unit operations are used in chemical industries? Describe the mechanical operations in detail.
Solve this question - Q22023Mid Semestereasy4 marks
a. Convert the heat transfer coefficient of value 250 Btu/h·ft²·°F into W/m²·°C. (2 marks) b. How many grams of liquid butane will be formed by liquefaction of…
Solve this question - Q32023Mid Semestermedium5 marks
Natural gas has the following composition: CH₄: 91%, C₂H₆: 5% and N₂: 4%. This gas is piped from the well at 80 °F and 80 psi. Calculate the following: (a) Part…
Solve this question - Q42023Mid Semesterhard5 marks
A solvent recovery system delivers a gas saturated with benzene vapour which analyzes on a benzene-free basis as follows: CO: 11%, O₂: 7% and N₂: 82%. This gas…
Solve this question - Q52023Mid Semesterhard5 marks
A spent dye sample obtained from a soap-making unit contains 7.6% glycerol and 9.3% salt. It is concentrated at a rate of 5000 kg/h in a double effect evaporato…
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20225 questions
- Q12022Mid Semestermedium5 marks
How many types of unit operations are used in chemical industries? Describe the mass transfer operations in detail.
Solve this question - Q22022Mid Semestereasy2 marks
The flow rate of water through a pipe is reported as 20 cubic feet per minute. Taking density of water as 1 g/cm³, calculate the mass flow rate in kg/s.
Solve this question - Q32022Mid Semestereasy2 marks
How many molecules are present in 791 g K₂CO₃?
Solve this question - Q42022Mid Semestermedium6 marks
Natural gas is piped from the well at 300 K and 400 kPa. The gas is found to contain 93.0% methane, 4.5% ethane and the rest nitrogen. Calculate the following:…
Solve this question - Q52022Mid Semestermedium5 marks
A liquid mixture containing 65 mol % benzene and 35 mol % toluene is subjected to flash vaporization at 363 K and 101.3 kPa. The vapour pressure of benzene at t…
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