The sum of powers of the concentration of the reactants in the rate law expression is called _________of that chemical reaction.
order
molecularity
elementary rate
average rate
The rate constants k1 and k2 for two different reaction are 1016.e-2000/T and 1015.e-1000/T, respectively. The temperature at which k1 = k2 is__________________
1000 K
2000 K
A chemical reaction is catalysed by a catalyst X. Hence, X
Reduces enthalpy of the reaction
Decreases rate constant of the reaction
Increases activation energy of the reaction
Does not affect equilibrium constant of the reaction
The activation energy for a simple chemical reaction A → B is Eα in forward direction. The activation energy for reverse reaction is _______________
Can be lesser or more than Eα
Is always double of Eα
Is negative of Eα
Is always less than Eα
The rate of first order reaction is 1.5 × 10-2 mol L-1 min-1 at 0.5 M concentration of the reactant. The half-life of the reaction is_____________
0.383 min
23.1 min
8.73 min
7.53 min
In the following reaction, how is the rate of appearance of the underlined product related to the rate of disappearance of the underlined reactant?
In a first order reaction A → B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then half-life is______________
3A → B + C
It would be a zero order reaction, when.
The rate of reaction is proportional to square of concentration of A.
The rate of reaction remains same at any concentration of A.
The rate remains unchanged at any concentration of B and C.
The rate of reaction doubles if concentration of B is increased to double.
For exothermic reaction, the energy of activation of the reactants is
Equal to the energy of activation of products
Less than the energy of activation of products.
Greater than the energy of activation of products.
Sometimes greater and sometimes less than that of the products.
