Chemical Engineering
GATE CH format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 351–360 of 378. Imported answers require independent review unless marked reviewed.
Question 14
Open questionCHMCQ1 markNeeds review
Which of the following conditions are valid at the plat point?
P) Density difference between the extract and raffinate phases is zero
Q) Interfacial tension between the extract and raffinate phases is zero
R) Composition difference between the extract and raffinate phases is zero
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Consider steady state mass transfer of a solute A from a gas phase to a liquid phase. The gas phase bulk and interface mole fractions are
and
, respectively. The liquid phase bulk and interface mole fractions are
and
, respectively. The ratio
is very close to zero.This implies that mass transfer resistance is
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Open questionCHMCQ1 markNeeds review
The following reaction rate curve is shown for a reaction A → P. Here,
and
represent reaction rate and conversion, respectively. The feed is pure A and 90% conversion is desired. 
Which amongst the following reactor configurations gives the lowest total volume of the reactor(s)?
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Consider a first order catalytic reaction in a porous catalyst pellet.
Given
– characteristic length of the pellet;
– effective diffusivity;
– mass transfer coefficient;
– rate constant based on volume of the catalyst pellet;
– concentration of reactant on the pellet surface.The expression for Thiele modulus is
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For a solid-catalyzed gas phase reversible reaction, which of the following statements is ALWAYS TRUE?
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Open questionCHMCQ1 markNeeds review
Match the variables in Group-1 with the instruments in Group-2.
Group-1
P) Temperature
Q) Liquid level
R) Vacuum
S) Concentration
Group-2
I) Capacitance probe
II) McLeod gauge
III) Chromatograph
IV) Thermistor
Choose the correct set of combinations.
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An LVDT (Linear Variable Differential Transformer) is a transducer used for converting
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The DCD (Double Contact Double Absorption) process is used for the manufacture of
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Open questionCHMCQ1 markNeeds review
Match the polymerization processes in Group-1 with the polymers in Group-2.
Group-1
P) Free radical polymerization
Q) Ziegler Natta polymerization
R) Condensation polymerization
Group-2
I) Nylon 6,6
II) Polypropylene
III) Poly vinyl chloride
Choose the correct set of combinations.
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The purpose of methanation reaction used in ammonia plants is to
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