Chemical Engineering
GATE CH purpose:exam-prep PYQs
Build your understanding with focused practice from past exam papers.
Questions 481–490 of 650. Imported answers require independent review unless marked reviewed.
Question 16
Open questionCHMCQ1 markNeeds review
Consider the two countercurrent heat exchanger designs for heating a cold stream from
to
, as shown in figure. The hot process stream is available at
. The inlet stream conditions and overall heat transfer coefficients are identical in both the designs. The heat transfer area in Design I and Design II are respectively
and
. If heat losses are neglected, and if both the designs are feasible, which of the following statements holds true? 
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Open questionCHMCQ1 markNeeds review
Producer gas is obtained by
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In Kraft process, the essential chemical reagents used in the digester are
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The most common catalyst used for oxidation of o-xylene to phthalic anhydride is
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In petroleum refining operations, the process used for converting paraffins and naphthenes to aromatics is
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Open questionCHMCQ1 markNeeds review
The combination that correctly matches the polymer in Group-1 with the polymerization reaction type in Group-2 is
Group-1: P) Nylon 6; Q) Polypropylene; R) Polyester
Group-2: I) Condensation polymerization; II) Ring opening polymerization; III) Addition polymerization
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Open questionCHNAT1 markNeeds review
The product of the eigenvalues of the matrix
is ______ (rounded off to one decimal place).Log in to check the answer
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Open questionCHNAT1 markNeeds review
For a hydraulic lift with dimensions shown in figure, assuming
, the maximum diameter
(in m) that lifts a vehicle of mass 1000 kg using a force of 100 N is ______ (rounded off to two decimal places). 
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The liquid flow rate through an equal percentage control valve, when fully open, is 150 gal/min and the corresponding pressure drop is 50 psi. If the specific gravity of the liquid is 0.8, then the valve coefficient,
(in gal/(min psi
)) is ______ (rounded off to two decimal places).Log in to check the answer
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Open questionCHNAT1 markNeeds review
Consider a sealed rigid bottle containing CO
and H
O at 10 bar and ambient temperature. Assume that the gas phase in the bottle is pure CO
and follows the ideal gas law. The liquid phase in the bottle contains CO
dissolved in H
O and is an ideal solution. The Henry’s constant at the system pressure and temperature is
bar. The equilibrium mole fraction of CO
dissolved in H
O is ______ (rounded off to three decimal places).Log in to check the answer
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