Chemical Engineering MCQs

6108 MCQs  (Page 276 of 611)

Attempt Chemical Engineering Quiz
Photo-chemical reactions occur in presence of ___________________?
A. Sunlight
B. Darkness
C. Solid catalysts
D. Monochromatic radiation only
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Effectiveness factor E. of a catalyst pellet is defined as, E = (actual rate within pore of the catalyst)/(rate if not snowed by pore diffusion), Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus) ___________________?
A. Tan ht/t
B. Tan t/t
C. Tan ht/tan t
D. None of these
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The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of ∫∞ 0 E.dt is____________________?
A. 0
B. 1
C. ∞
D. √2π
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Molecularity of an elementary reaction, P + Q → R + S is ____________________?
A. 1
B. 2
C. 3
D. 4
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The ‘E’ curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt _____________________?
A. At the inlet
B. At the outlet
C. In the reactor
D. Averaged over the inlet and outlet
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For the reaction as shown in the bellow figure, the rate of formation of Z is 0.2 gm mole/litre.hr. What is the rate of disappearance of X in gm mole/litre.hr ?
A. 0.4
B. 0.1
C. 0.2
D. None of these
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The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line ?
A. Xa vs . η
B. Xa vs ln η
C. Xa/(1 – xa)vs η
D. Xa(1 – xa)vs η
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Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2/sec.D1 = diffusion co-efficient; cm2/sec L = length of the reactor, cm t = time, sec, v = volumetric flow rate, cm3/sec. V = volume, cm3.) ?
A. Reactor dispersion number (d/vl)
B. Reduced time (vt/v)
C. Thiele modulus l √(k/d1)
D. None of these
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Given, 3H2 + CO = CH4 + H2O, KP = 101.84 and, 4H2 + CO2 = CH4 + 2H2O, KP = 101.17 the KP for the reaction CO + H2O = CO2 + H2 is __________________?
A. 103.01
B. 10-0.67
C. 10-3.01
D. 100.67
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The sequence in which three CSTR’s of volumes 5, 10 and 15 m3 will be connected in series to obtain the maximum production in a second order irreversible reaction is ____________________?
A. 15, 10, 5
B. 5, 10, 15
C. 10, 5, 15
D. 10, 15, 5
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Word of the Day
28 Jul
Fragile
(of an object) easily broken or damaged.
نازک، کاغذی، آسانی سے ٹوٹ جانیوالا

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