Chemical Engineering
2025 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE CH 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 34–36 of 65. Imported answers require review unless explicitly marked reviewed.
Question 34
Open questionCHNAT1 markNeeds review
Oil is extracted from mustard seeds having 20 wt% oil and 80 wt% solids, using hexane as a solvent. After extraction, the hexane-free residual cake contains 1 wt% oil. Assuming negligible dissolution of cake in hexane, the percentage oil recovery in hexane is ____% (rounded off to the nearest integer).
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 35
Open questionCHNAT1 markNeeds review
The residence-time distribution (RTD) function of a reactor (in min
) is
The mean residence time of the reactor is ____ min (rounded off to 2 decimal places).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 36
Open questionCHMCQ2 marksNeeds review
Consider a Cartesian coordinate system with orthogonal unit basis vectors
defined over a domain:
. Choose the condition for which the divergence of the vector field
is zero.Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer