CBSE
Multiple Choice QuestionsGiven 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 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:
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.
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
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
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
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
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 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
