Chemical Engineering Gate Yearwise 


Chemical Engineering Gate 2020 Questions with Answer

Ques 14 GATE 2020

A feed stream containing pure species L flows into a reactor, where L is partly converted to M as shown in the figure.

The mass flow rate of the recycle stream is 20% of that of the product stream. The overall conversion of L (based on mass units) in the process is 30%. Assuming steady state operation, the one-pass conversion of L (based on mass units) through the reactor is

A

34.2%

B

30%

C

26.3%

D

23.8%


(c) is the correct answer.

Ques 15 GATE 2020

Which one of the following is NOT CORRECT?

A

nylon-6,6 is produced by condensation polymerization

B

phenol-formaldehyde resin is a thermosetting polymer

C

high density polyethylene (HDPE) is produced by condensation polymerization

D

poly(ethylene terephthalate) (PET) is a polyester


(c) is the correct answer.

Ques 16 GATE 2020

The operating temperature range for the Haber process is 350-500°C. It is used for the production of ammonia at

A

20 MPa using Fe catalyst in an exothermic reaction

B

0.1 MPa using Fe catalyst in an exothermic reaction

C

20 MPa using Fe catalyst in an endothermic reaction

D

20 MPa using zeolite catalyst in an endothermic reaction


(a) is the correct answer.

Ques 17 GATE 2020

Consider the refinery processes in Group-1 and the catalysts in Group - 2.

Group-1Group-2
P HydrodesulfurizationI Zeolites
Q Fluid catalytic cracking (FCC)II PtAl2O3
R Naphtha reformingIII Co-Mo/Al2O3

The correct combination is

A

P-II, Q-I, R-III

B

P-III, Q-II, R-I

C

P-III, Q-I, R-II

D

P-I, Q-III, R-II


(c) is the correct answer.

Ques 18 GATE 2020

Consider the processes in Group-1 and the reactions in Group - 2.

Group-1Group-2
P Solvay processI RCOOH+NaOH→RCOONa+H2O
Q Oxo processII CH2=CH2+CO+H2→CH3CH2CHO
R SaponificationIII CaCO3+2NaCl→Na2CO3+CaCl2

The correct combination is

A

P-II, Q-I, R-III

B

P-III, Q-II, R-I

C

P-III, Q-I, R-II

D

P-I. Q-III, R-II


(b) is the correct answer.

Ques 19 GATE 2020

Given dy/dx=y-20 and y|x=0=40, the value of y at x=2 is _______ (round off to nearest integer).


(168) is the correct answer.

Ques 20 GATE 2020

Consider the following dataset.

X1351525
f(x)6810125

The value of the integral ∫125f(x)dx using Simpson's 1/3rd rule is _______ (round off to 1 decimal place).


(241.9) is the correct answer.

Ques 21 GATE 2020

Which one of the following methods requires specifying an initial interval containing the root (i.e., bracketing) to obtain the solution of f(x)=0, where f(x) is a continuous non-linear algebraic function?

A

Newton-Raphson method

B

regula falsi method

C

secant method

D

fixed point iteration method


(b) is the correct answer.

Ques 22 GATE 2020

Consider the hyperbolic functions in Group - 1 and their definitions in Group -2.

The correct combination is

A

P-IV, Q-I, R-III, S-II

B

P-II, Q-III, R-I, S-IV

C

P-IV, Q-I, R-II, S-III

D

P-I, Q-II, R-IV, S-III


(c) is the correct answer.

Ques 23 GATE 2020

Consider the following continuously differentiable function v(x,y,z)=3x2yi+8y2z j+5xyz k where i, j, and k represent the respective unit vectors along the x, y, and z directions in the Cartesian coordinate system. The curl of this function is

A

-3x2i-8y2j+5z(x+y)k

B

6xyi-16yz j+5xy k

C

(5xz-8y2)i-5yz j-3x2k

D

y(11x+16z)


(c) is the correct answer.

Ques 24 GATE 2020

Consider the following unit step function.

The Laplace transform of this function is

A

e-3s/s

B

e-3s/s2

C

e-3s/(3s)

D

e-6s/s


(a) is the correct answer.

Ques 25 GATE 2020

Sum of the eigenvalues of the matrix is _______ (round off to nearest integer).


(14) is the correct answer.

Ques 26 GATE 2020

In a box, there are 5 green balls and 10 blue balls. A person picks 6 balls randomly. The probability that the person has picked 4 green balls and 2 blue balls is

A

42/1001

B

45/1001

C

240/1001

D

420/1001


(b) is the correct answer.

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