Related Questions

For a __________ order reaction, the units of rate constant and rate of reaction are the same.
A Zero
B First
C Second
D Fractional
When a catalyst increases the rate of chemical reaction, the rate constant
A Decreases
B Increases
C Remains constant
D Becomes infinite
The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction.
A More than
B Less than
C Equal to
D Either B or C
A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)
A $$ \propto {\text{CA}}$$
B $$ \propto \frac{1}{{{\text{CA}}}}$$
C Independent of temperature
D None of these
The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are
A Always irreversible
B Insensitive to temperature changes
C Mostly irreversible
D Highly temperature sensitive
In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be
A Greater than 1.0
B Less than 1.0
C Equal to zero
D Equal to 1.0
Overall rate of reaction in a heterogenous 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
When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is
A > 1
B 1
C 0
The rate constant of a chemical reaction decreases by decreasing the
A Pressure
B Concentration of reactants
C Temperature
D Duration of reaction
The rate constant of a chemical reaction increases by increasing the
A Temperature
B Pressure
C Reactant's concentration
D None of these

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