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Chemical Reaction Engineering

Chemical Reaction Engineering
If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is

One
Zero
Two
Three

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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
During manufacture of H₂SO₄, the oxidation of SO₂ to SO₃ by oxygen is an en- dothermic reaction. The yield of SO₃ will be maximised, if the

Temperature is increased
Temperature is increased and pressure is reduced
Pressure is reduced
Temperature is reduced and pressure is increased

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Chemical Reaction Engineering
A first order reaction requires two equal sized CSTR. The conversion is

Less when they are connected in series
More when they are connected in series
Same whether they are connected in series or in parallel
More when they are connected in parallel

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Chemical Reaction Engineering
The response curve for a step input signal from a reactor is called C-curve. The variance of C-curve in a 'tanks in series model' comprising of 'm' tanks is equal to

m²
m
√m
1/m

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

1
10
∞
0

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