CBSE
The rate of reaction between two reactants A and B decreases by a factor of 4, if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is
-1
-2
1
2
Given that the temperature co-efficient for the saponification of ethyl acetate by NaOH is 1.75. The value of activation is:
9.207 Kcal mol-1
10.207 Kcal mol-1
4.0456 Kcal mol-1
7.041 Kcal mol-1
The rate constant of a reaction depends on
the temperature of a reaction
the time of a reaction
the extent of reaction
the initial conc. of the reactant
The increase in rate of reaction is four times when the concentration of reactant is increased two times.The order of reaction is:
Zero.
First.
Second.
Third.
The rate constant for a first order reaction is 60 s-1 .The time required to reduce the concentration of the reactant to of its initial value is:
For a first order reaction A B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 x 10-5 mol L-1s-1. The half-life period of the reaction is
220 s
30 s
300 s
347 s
If 50% of a radioactive substance dissociates in 15 min, then the time taken by substance to dissociate 99% will be
50 min
100 min
99 min
150 min
For a reaction, A+ B Product, the rate is given by,
r = k[A]1/2[B]2
What is the order of the reaction?
0.5
2
2.5
1
The half-life of a first order reaction having rate constant k =1.7 x10-5 s-1 is :
12.1 h
9.7 h
11.3 h
1.8 h
The rate equation for a reaction,
A B
is r = k[ A]0. If the initial concentration of the reactant is a mol dm-3 the half-life period of the reaction is