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Process Calculations - Chemical Engineering Previous Year Questions

Practice Process Calculations - Chemical Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

18Papers

18Years

43Questions

1Topics

Process Calculations question pattern

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Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

43questions

Medium 26 60.5%

Easy 15 34.9%

Hard 2 4.7%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

43questions

MCQ 26 60.5%

Numerical Answer Type (NAT) 15 34.9%

Fill in the blanks 2 4.7%

Subject weightage

Top subjects by unique question coverage.

Chemical Engineering

43 Qs

Most asked topics

Top topics across the included previous year papers.

Process Calculations

43 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Material and Energy Balances

29 Qs

Recycle, Bypass and Purge

11 Qs

Phase Rule and Degrees of Freedom

3 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Chemical Engineering (CH) 2026

2 Qs

Chemical Engineering (CH) 2025

1 Qs

Chemical Engineering (CH) 2024

2 Qs

Chemical Engineering (CH) 2023

3 Qs

Chemical Engineering (CH) 2021

1 Qs

Chemical Engineering (CH) 2020

1 Qs

Chemical Engineering (CH) 2019

1 Qs

Chemical Engineering (CH) 2018

2 Qs

Chemical Engineering (CH) 2017

2 Qs

Chemical Engineering (CH) 2016

2 Qs

Chemical Engineering (CH) 2014

2 Qs

Chemical Engineering (CH) 2013

2 Qs

Chemical Engineering (CH) 2012

2 Qs

Chemical Engineering (CH) 2011

5 Qs

Chemical Engineering (CH) 2010

3 Qs

Chemical Engineering (CH) 2009

3 Qs

Chemical Engineering (CH) 2008

5 Qs

Chemical Engineering (CH) 2007

4 Qs

Browse by subtopics

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Material and Energy Balances

Explore previous-paper coverage, trends and focused practice for Material and Energy Balances.

29 questions16 papers16 years

Recycle, Bypass and Purge

Explore previous-paper coverage, trends and focused practice for Recycle, Bypass and Purge.

11 questions10 papers10 years

Phase Rule and Degrees of Freedom

Explore previous-paper coverage, trends and focused practice for Phase Rule and Degrees of Freedom.

3 questions3 papers3 years

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper name	Year	PDF
Chemical Engineering (CH) 20262026 2 questions in this view	2026	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20252025 1 questions in this view	2025	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20242024 2 questions in this view	2024	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20232023 3 questions in this view	2023	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20212021 1 questions in this view	2021	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20202020 1 questions in this view	2020	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20192019 1 questions in this view	2019	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20182018 2 questions in this view	2018	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20172017 2 questions in this view	2017	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20162016 2 questions in this view	2016	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20142014 2 questions in this view	2014	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20132013 2 questions in this view	2013	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20122012 2 questions in this view	2012	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20112011 5 questions in this view	2011	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20102010 3 questions in this view	2010	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20092009 3 questions in this view	2009	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20082008 5 questions in this view	2008	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download
Chemical Engineering (CH) 20072007 4 questions in this view	2007	ExamElite PDFs ExamElite solutions Official documents Official question paperOriginal authority-issued PDF Official Download

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

2007 · Chemical Engineering · Process Calculations · Recycle, Bypass and Purge

Chemical Engineering (CH) 2007

A simplified flowsheet is shown in the figure for production of ethanol from ethylene. The conversion of ethylene in the reactor is 30 % and the scrubber following the reactor completely separates ethylene ( as top stream ) and ethanol and water as bottoms. The last (distillation) column gives an ethanol-water azeotrope (90 mol % ethanol) as the final product and water as waste. The recycle to purge ratio is 34.
The reaction is : C₂H₄(g) + H₂O(g) → C₂H₅OH (g)
For an azeotrope product rate of 500 mols/hr, the recycle gas flowrate in mols/hr is

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2008 · Chemical Engineering · Process Calculations · Phase Rule and Degrees of Freedom

Chemical Engineering (CH) 2008

Q.8 For a system containing species P, Q and R, composition at point k on the ternary plot is

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2009 · Chemical Engineering · Process Calculations · Material and Energy Balances

Chemical Engineering (CH) 2009

A dehumidifier (shown below) is used to completely remove water vapor from air.
Which ONE of the following statements is TRUE ?

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2010 · Chemical Engineering · Process Calculations · Material and Energy Balances

Chemical Engineering (CH) 2010

A new linear temperature scale, denoted by °S, has been developed, where the freezing point of water is 200°S and the boiling point is 400°S. On this scale, 500°S corresponds, in degrees Celsius, to

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2011 · Chemical Engineering · Process Calculations · Recycle, Bypass and Purge

Chemical Engineering (CH) 2011

Ammonia is synthesised at 200 bar and 773 K by the reaction \( N_2 + 3H_2 \rightleftharpoons 2NH_3 \). The yield of ammonia is 0.45 mol/mol of ammonia. Flow sheet for the process (along with available compositions) is shown below. The single pass conversion for \( H_2 \) in the reactor is 20 %. The amount of \( H_2 \) lost in the purge as a PERCENTAGE of \( H_2 \) in fresh feed is

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2012 · Chemical Engineering · Process Calculations · Recycle, Bypass and Purge

Chemical Engineering (CH) 2012

The reaction \(A_{(l)} + B_{(g)} \rightarrow C_{(l)} + D_{(g)}\) is carried out in a reactor followed by a separator as shown below. Notation: Molar flow rate of fresh B is \(F_{FB}\), Molar flow rate of A is \(F_A\), Molar flow rate of recycle gas is \(F_{RG}\), Mole fraction of B in recycle gas is \(Y_{RB}\), Molar flow rate of purge gas is \(F_{PG}\), Molar flow rate of C is \(F_C\). Here, \(F_{FB} = 2\) mol/s, \(F_A = 1\) mol/s, \(F_B/F_A = 5\) and A is completely converted. If \(Y_{RB} = 0.3\), the ratio of recycle gas to purge gas (\(F_{RG}/F_{PG}\)) is

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Process Calculations - Chemical Engineering Previous Year Questions