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Chemical Reaction Engineering
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Q61

In the converter of the contact process for the manufacture of H₂SO₄ the equilibrium conversion of SO₂ ____(i)____ with increase in temperature and ___(ii)___ with increase in the mole ratio of SO₂ to air.

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Q62

The reaction A → B is conducted in an isothermal batch reactor. If the conversion of A increases linearly with holding time, then the order of the reaction is

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Q63

Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

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Q64

For the reaction, A + B → 2B + C,

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Q65

An irreversible first order reaction is being carried out in a CSTR and PFR of same volume. The liquid flow rates are same. The relative conversion will

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Q66

Organic catalysts differ from the inorganic catalyst in the sense that the former is

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Q67

For an ideal plug flow reactor, the value of Peclet number is

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Q68

If the time required for half change is inversely proportional to the square of initial concentration and the velocity depends on the units in which the concentration term is expressed, then the order of reaction is

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Q69

If 'n' is the order of reaction, then unit of rate constant is

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Q70

A stirred tank reactor compared to tubular-flow reactor provides

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Q71

The energy balance equation over a tubular reactor under transient conditions is

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Q72

Brunaur, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation?

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Q73

A space velocity of 5 hr^-1 means that

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Q74

An isothermal irreversible reaction is being carried out in an ideal tubular flow reactor. The conversion in this case will __________ with decrease in space time.

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Q75

For multiple reactions, the flow pattern within the vessel affects the

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Q76

If helium is introduced in a reactor containing O₂, SO₂ and SO₃ at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO₃ (as per Le Chatlier principle)

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Q77

The temperature dependence of reaction rate constant (K) by Arhenius law is given by

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Q78

Consider the n^th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction

(t_{\frac{1}{2}})

and the initial reactant concentration (C_A₀) gives a straight line plot?

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Q79

For a tubular flow reactor with uniform concentration and temperature, the independent variable is

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Q80

A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is

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