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Chemical Reaction Engineering

Chemical Reaction Engineering
For the reaction, A + B → 2B + C,

rA = rB/2
rA = rB
rA = 2rB
rA = -rB

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Chemical Reaction Engineering
Which of the following is not endothermic in nature?

Steam reforming of naphtha
Gasification of carbon
Combustion of sulphur
Thermal cracking of fuel oil

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Chemical Reaction Engineering
For an autocatalytic reactor, the suitable reactor set up is

P.F. reactor followed by CSTR
CSTR followed by P.F. reactor
CSTR in series
P.F. reactors in series

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Chemical Reaction Engineering
In the hydrodealkylation of toluene to benzene, the following reactions occur:C₇H₈ + H₂ → C₆H₆ + CH₄2C₆H₆ ⇋ C₁₂H₁₀ + H₂Toluene and hydrogen are fed to a reactor in a molar ratio 1:5.80% of the toluene gets converted and the selectivity of benzene(defined as moles of benzene formed/moles of toluene converted) is 90%. The fractional conversion of hydrogen is

0.136
0.16
0.152
0.144

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Chemical Reaction Engineering
Photochemical reaction rate does not depend significantly on temperature, because

The energy of reacting molecules exceeds the activation energy by absorption of light
It is a reversible reaction
None of these
It is an exothermic reaction

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Chemical Reaction Engineering
For the liquid phase parallel reactions:R, rR = K?.CA2; E? = 80 KJ/moleS, rS = K?.CA ; E? = 120 KJ/mole The desired product is R. A higher selectivity of R will be achieved, if the reaction is conducted at

High temperature in a CSTR
Low temperature in a PFR
High temperature in a PFR
Low temperature in a CSTR

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