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.Management Sciences
Category: Chemical Reaction
The rate of reaction of a/an ______________ reaction is not affected by temperature rise ?
A. Autocatalytic
B. Photochemical
C. Consecutive
D. Zero order
Overall rate of reaction in a heterogeneous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually ________________ the concentration of catalyst, if it does not entail a chain mechanism?
A. Proportional to
B. Independent of
C. Inversely proportional to
D. Proportional to the square of
For an ideal gas mixture undergoing a reversible gaseous phase chemical reaction, the equilibrium constant ?
A. Is independent of pressure
B. Increases with pressure
C. Decreases with pressure
D. Increases /decreases with pressure depending on the stoichiometric co-efficients of the
reaction
Half life period of a first order irreversible reaction A → B is ______________________?
A. k/2
B. ln k/2
C. ln 2/k
D. ln 0.5/k
The rate at which a chemical substance reacts is proportional to its _____________________?
A. Active mass
B. Molecular weight
C. Equivalent weight
D. Atomic weight
Transition state theory gives the rate constant as__________________?
A. K α e-E/RT
B. K α eE/RT
C. K α T . e-E/RT
D. K α √T . e-E/RT
Fractional conversion _________________ for an exothermic reversible chemical reaction, when the temperature is maximum?
A. Increases
B. Remains unchanged
C. Decreases
D. Unpredictable from the data
According to Arrhenius equation of temperature dependency of rate constant for an elementary reaction _________________?
A. k ∝ √T
B. k ∝ e-E/RT
C. k ∝ T e-E/RT
D. None of these
Pick out the wrong statement ?
A. Chemical reactions with high activation energy are very temperature sensitive
B. A flat velocity profile exists in a plug flow reactor
C. The residence time for all the elements of fluid in case of a P.F.R. need not be same
D. Half life of a reaction increases with increased initial concentration for reaction orders more
than one
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