Related Questions

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will
A Remain the same
B Be halved
C Also be doubled
D Become one fourth
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.
A Independent of
B Directly proportional to
C Inversely proportional to
D Proportional to the square of
Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.
A Zero order
B Third order
C Consecutive
D None of these
If the time required for half change is inversely proportional to the square of initial concentration and the velocity depends on the units in which the concentration term is expressed, then the order of reaction is
A 1
B 2
C 3
D 0
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
A Zero
B One
C Two
D Three
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
A 0
B 1
C 2
D 3
The knowledge of initial concentration and rate constant is necessary to determine the half life time of a reaction of __________ order.
A Zero
B First
C Second
D None of these
If n = overall order of a chemical reaction. a = initial concentration of reactant. t = time required to complete a definite fraction of the reaction. Then pick out the correct relationship.
A $${\text{t}} \propto \frac{1}{{{{\text{a}}^{\text{n}}}}}$$
B $${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} - 1}}}}$$
C $${\text{t}} \propto \frac{1}{{{{\text{a}}^{{\text{n}} + 1}}}}$$
D $${\text{t}} \propto {{\text{a}}^{\text{n}}}$$
In a zero order reaction, reactants concentration does not change with time and the
A Time for half change is half the time taken for completion of the reaction
B Time for half change is independent of the initial concentration
C Time for completion of the reaction is independent of the initial concentration
D Reaction rate is trebled when the initial concentration is trebled
Half-life period for a first order reaction is __________ the initial concentration of the reactant.
A Directly proportional to
B Inversely proportional to
C Independent of
D None of these

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