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.Management Sciences
Category: Chemical Reaction
Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in ______________ in conversion?
A. Decrease
B. Increase
C. No change
D. Either A. or B., depends on the type of reaction
Considering the endothermic dissociation of CaCO3 in a closed vessel (CaCO3 ⇌ CaO + CO2), the pressure of CO2 increases, if____________________?
A. A catalyst is added
B. The temperature is increased
C. An inert gas is pumped keeping the temperature constant
D. None of these
The catalytic activity of enzymes is due to their capacity to lower the ______________ energy?
A. Activation
B. Potential
C. Kinetic
D. None of these
The minimum energy required to allow a chemical reaction to proceed is termed as the ‘threshold energy ‘. Chemical reactions with low activation energy are ________________?
A. Always irreversible
B. Insensitive to temperature changes
C. Mostly irreversible
D. Highly temperature sensitive
In which of the following gaseous phase reactions, the equilibrium of the reaction remains unaffected by pressure changes ?
A. 2O3 ⇌ 3O2
B. N2 + O2 ⇌ 2NO
C. 2NO2 ⇌ N2O4
D. 2SO2 + O2 ⇌ 2SO3
Thermodynamic equilibrium constant in a system is affected by___________________?
A. Inerts
B. Pressure
C. Temperature
D. All A., B. & C.
The half life period of a first order reaction is given by (where, K = rate constant) ?
A. 1.5 K
B. 2.5 K
C. 0.693/K
D. 6.93 K
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