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 temperature dependance of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, k = Ae-E*/RT. Activation energy (E*) of the reaction can be calculated by plotting
log k vs 1/T
k vs T
The activation energy for a simple chemical reaction A → B is Eα in forward direction. The activation energy for reverse reaction
Can be less than or more than Eα
Is always double of Eα
Is negative of Eα
Is always less than Eα
When a biochemical reaction is carried out in laboratory from outside of human body in the absence of enzyme, the rate of reaction obtained is 10-6 times, then activation energy of the reaction in the presence of enzyme is
6/RT
P is required
Different from Eα obtained in laboratory
Cannot say any things
The reaction A → B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 h. What is the time taken for the conversion of 0.9 mole of A to 0.675 mole of B?
0.25 h
2 h
1 h
0.5 h
For the reaction
2 A + B → 3C + D
Which of the following does not express the reaction rate?
The representation of rate of reaction in terms of concentration of the reactants is known as ______________
partial pressure
rate law
total rate
Activation energy of a chemical reaction can be determined by
Evaluating rate constant at standard temperature
Evaluating velocities of reaction at two different temperatures
Evaluating rate constants at two different temperatures
Changing concentration of reactants
In gaseous reactions,the units of the rate equation will be ____________
Mol L-1
mol s-1
atm L-1
atm s-1
A substance 'A' decomposes by a first order reaction starting initially with [A] = 2.00m and after 200 min, [A] becomes 0.15 m. For this reaction t1/2 is
53.50 min
50.4 min
48.45 min
46.45 min
