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Chemical Reaction Engineering

Chemical Reaction Engineering
The rate of the reaction, X → Y, quadruples when the concentration of 'X' is doubled. The rate expression for the reaction is, r = K Cxn, the value of 'n' in this case will be

2
3
1

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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
A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.

Equal to or more than
Equal to
Less than
More than

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Chemical Reaction Engineering
If the time required to complete a definite fraction of reaction varies inversely as the concentration of the reactants, then the order of reaction is

1
2
3

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

(time)n - 1 (concentration)
1/(time)(concentration)n - 1
None of these
(time)-1 (concentration)n - 1

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Chemical Reaction Engineering
Which one is the rate controlling step in a solid-gas non-catalytic reaction occurring at very high temperature?

Chemical reaction
Ash layer diffusion
Film diffusion
Pore diffusion

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