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Question 1 of 20
India has no elemental sulphur deposits that can be economically exploited. In India, which one of the following industries produces elemental sulphur as a by-product?Correct
Question 2 of 20
Two paper pulp plants P and Q use the same quality of bamboo as a raw material. The chemicals used in their digester are as follows:
Plant P Plant Q
NaOH Yes No
Na2S Yes No
Na2CO3 Yes Yes
NaHCO3 No Yes
Na2SO3 No Yes
Which one of the following statements is CORRECT?Correct
Question 3 of 20
Match the industrial processes in Group-1, with the catalyst materials in Group-2.
P Ethylene polymerisation I Nickel
Q Petroleum feedstock cracking II Vanadium pentoxide
R Oxidation of SO2 to SO3 III Zeolite
S Hydrogenation of oil
IV Aluminium triethyl with titanium chloride promoterCorrect
Question 4 of 20
The Lagrange mean-value theorem is satisfied for f(x) = x*x*x + 5 , in the interval (1, 4) at a value (rounded off to the second decimal place) of x equal toCorrect
Question 5 of 20
A jacketed stirred tank with a provision for heat removal is used to mix sulphuric acid and water in a steady state flow process. H2SO4 (l) enters at a rate of 4 kg/h at 25 degreeC and H2O (l) enters at a rate of 6 kg/h at 10 degreeC. The following data are available:
Specific heat capacity of water = 4.2 kJ kg‒1K‒1.
Specific heat capacity of aqueous solution of 40 mass% H2SO4 = 2.8 kJ (kg solution)‒1 K‒1.
Assume the specific heat capacities to be independent of temperature.
Based on reference states of H2SO4 (l) and H2O (l) at 25 degreeC, the heat of mixing for aqueous solution
of 40 mass% H2SO4 = ‒ 650 kJ (kg H2SO4)‒1.
If the mixed stream leaves at 40oC, what is the rate of heat removal (in kJ/h)?Correct
Question 6 of 20
An ideal gas is adiabatically and irreversibly compressed from 3 bar and 300 K to 6 bar in a closed system. The work required for the irreversible compression is 1.5 times the work that is required for reversible compression from the same initial temperature and pressure to the same final pressure.
The molar heat capacity of the gas at constant volume is 30 J mol‒1 K‒1 (assumed to be independent of temperature); universal gas constant, R is 8.314 J mol‒1 K‒1; ratio of molar heat capacities is 1.277. The temperature (in K, rounded off to the first decimal place) of the gas at the final state in
the irreversible compression case isCorrect
Question 7 of 20
Consider a rigid solid sphere falling with a constant velocity in a fluid. The following data are known at the conditions of interest: viscosity of the fluid = 0.1 Pa s, acceleration due to gravity = 10 m/(s*s), density of the particle = 1180 kg/(m*m*m) and density of the fluid = 1000 kg(m*m*m). The diameter (in mm, rounded off to the second decimal place) of the largest sphere that settles in the Stokes’ law regime (Reynolds number <= 0.1), isCorrect
Question 8 of 20
A binary system at a constant pressure with species ‘1’ and ‘2’ is described by the two-suffix Margules equation Ge / RT = 3AB where Ge is the molar excess Gibbs free energy, R is the universal gas constant, T is the temperature and A,B are the mole fractions of species 1 and 2, respectively.
At a temperature T G1/RT = 1 and G2/RT = 2 where G1 and G2 are the molar Gibbs free energies of pure species 1 and 2 respectively.At the same emperature, g represents the molar Gibbs free energy of the mixture. For a binary mixture with 40 mole % of species 1, the value (rounded off to the second decimal place) of G/RT isCorrect
Question 9 of 20
The space between two hollow concentric spheres of radii 0.1 m and 0.2 m is under vacuum. Exchange of radiation (uniform in all directions) occurs only between the outer surface (S1) of the smaller sphere and the inner surface (S2) of the larger sphere. The fraction (rounded off to the second decimal place) of the radiation energy leaving S2, which reaches S1 isCorrect
Question 10 of 20
A binary distillation column is to be designed using McCabe Thiele method. The distillate contains 90 mol% of the more volatile component. The point of intersection of the q-line with the equilibrium curve is (0.5, 0.7). The minimum reflux ratio (rounded off to the first decimal place) for this operation isCorrect
Question 11 of 20
At 30 degreeC the amounts of acetone adsorbed at partial pressures of 10 and 100mmHg are .1 and .4 kg acetone per kg activated carbon respectively.Assume Langmuir isotherm describes the adsorption of acetone on activated carbon. What is the amount of acetone adsorbed (in kg per kg of activated carbon) at a partial pressure of 50mmHg and 30 degree C?Correct
Question 12 of 20
Consider the following two cases for a binary mixture of idea gases A and B under steady state conditions.In case 1 the diffusion of A occurs through non diffusing B.In case 2 equimolal counter diffusion of A and B occurs.In both the cases the total pressure is 100kPa and the partial pressures of A at two points separated by a distance of 10mm are 10kPa and 5kPa.Assume that the Fick’s first law of diffusion is applicable.What is the ratio of molar flux of A in case 1 to that in case 2?Correct
Question 13 of 20
The liquid phase reversible reaction A and B is carried out in an isothermal CSTR operating under steady state conditions.The inlet stream does not contain B and the concentration of A in the inlet stream is 10mol/lit.The concentrations of A at the reactor exit for the residence times of 1s and 5s are 8 mol/lit and 5 mol/lit respectively.Assume the forward and backward reactions are elementary following the first order rate law.Also assume that the system has constant molar density.The rate constant of forward reaction isCorrect
Question 14 of 20
A porous pellet with Pt dispersed in it is used to carry out a catalytic reaction. Following two scenarios are possible.
Scenario 1: Pt present throughout the pores of the pellet is used for catalyzing the reaction.
Scenario 2: Pt present only in the immediate vicinity of the external surface of the pellet is used for catalyzing the reaction.
At a large value of Thiele modulus, which one of the following statements is TRUE?Correct
Question 15 of 20
A liquid flows through an “equal percentage” valve at a rate of 2 m cube/h when the valve is 10% open. When the valve opens to 20% the flowrate increases to 3 m cube/h. Assume that the pressure drop across the valve and the density of the liquid remain constant. When the valve opens to 50%, the flowrate (in m cube/h, rounded off to the second decimal place) isCorrect
Question 16 of 20
Which of the following can change if only the catalyst is changed for a reaction system?Correct
Question 17 of 20
For which reaction order the half life of the reactant is half of the full life time(time for 100% conversion) of the reactant?Correct
Question 18 of 20
Identify the wrong statementCorrect
Question 19 of 20
Match the polymer with the catalyst used in manufacturing
I.Low density polyethylene
II.High density polyethylene
P.Ziegler natta catalyst
Q.traces of oxygen
Question 20 of 20
Select the wrong statement regarding water gas shift convertors from the below listCorrect