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MCQs

Total Questions : 107 | Page 11 of 11 pages
Question 101. In the manufacture of sulphuric acid by the contact process, the catalytic oxidation of SO2 is carried out in multiple stages mainly to
  1.    increase the reaction rate by providing inter-stage heating
  2.    increase the overall conversion by providing inter-stage heating
  3.    increase the overall conversion by providing inter-stage cooling
  4.    decrease the overall conversion by removing sulphur trioxide between stages
 Discuss Question
Answer: Option C. -> increase the overall conversion by providing inter-stage cooling


-NA-


Question 102. Match the following.Group 1                           Group 2(P) Viscosity                   (1) Pyrometer(Q) Pressure                  (2) Hot wire anemometer(R) Velocity                    (3) Rheometer(S) Temperature           (4) Piezoelectric element
  1.    P-4, Q-3, R-1, S-2
  2.    P-3, Q-4, R-2, S-1
  3.    P-3, Q-4, R-1, S-2
  4.    P-4, Q-3, R-2, S-1
 Discuss Question
Answer: Option B. -> P-3, Q-4, R-2, S-1


-NA-


Question 103. The overall rates of an isothermal catalytic reaction using spherical catalyst particles of diameters 1 mm and 2 mm are rA1 and rA2 (in mol (kg-catalyst)-1 h-1), respectively. The other physical properties of the catalyst particles are identical. If pore diffusion resistance is very high, the ratio rA2/rA1 is __________
  1.    0.5
  2.    0.9
  3.    1.4
  4.    2.5
 Discuss Question
Answer: Option A. -> 0.5


-NA-


Question 104. For the function f(z) = 1/[(2 - z)(z + 2] the residue at z = 2 is _________
  1.    -0.25
  2.    -0.24
  3.    -0.23
  4.    -0.22
 Discuss Question
Answer: Option A. -> -0.25


-NA-


Question 105. The solution of the differential equation dy/dx - y2 = 0, given y = 1 at x = 0 is
  1.    1/(1 + x)
  2.    1/(1 - x)
  3.    1/(1 - x)2
  4.    x3/3 + 1
 Discuss Question
Answer: Option B. -> 1/(1 - x)


-NA-


Question 106. The solution of the differential equation d2y/dx2 - dy/dx + 0.25y = 0, given y = 0 at x = 0 and dy/dx = 1 at x = 0 is
  1.    x e0.5x - x e-0.5x
  2.    0.5 x ex - 0.5 x e-x
  3.    x e0.5x
  4.    -x e0.5x
 Discuss Question
Answer: Option C. -> x e0.5x


-NA-


Question 107. In a process occurring in a closed system F, the heat transferred from F to the surroundings E is 600 J. If the temperature of E is 300 K and that of F is in the range 380 - 400 K, the entropy changes of the surroundings (ΔSE) and system (ΔSF), in J/K, are given by
  1.    Î”SE = 2, ΔSF = -2
  2.    Î”SE = -2, ΔSF = 2
  3.    Î”SE = 2, ΔSF < -2
  4.    Î”SE = 2, ΔSF > -2
 Discuss Question
Answer: Option D. -> ΔSE = 2, ΔSF > -2


-NA-


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