Chemical Engineering
2026 · Paper 1
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Complete GATE CH 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–65 of 65. Imported answers require review unless explicitly marked reviewed.
Question 64
Open questionCHNAT2 marksNeeds review
Cyclohexane (C₆H₁₂) is produced from benzene (C₆H₆) and hydrogen (H₂) according to the following reaction.
Consider the process flow diagram shown in the figure.
In this process, the overall and single-pass conversions are 90% and 25%, respectively. The recycle stream contains 25 mol % C₆H₆ and 75 mol % H₂. If the fresh feed contains 25% excess H₂, at steady state, the ratio of the molar flow rate of recycle stream to that of the fresh feed is _________ (rounded off to one decimal place).
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Open questionCHNAT2 marksNeeds review
The velocity profile for a fully developed laminar flow of an incompressible Newtonian fluid, at steady state, through a horizontal infinitely wide and long slit of gap 0.01 m is given by the following equation.
where y is the vertical distance measured from the center of the slit. The average velocity of the fluid (in m s⁻¹) is __________ (rounded off to the nearest integer).
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