EASY
JEE Main/Advance
IMPORTANT
Earn 100

Consider the following first order competing reactions :

XkIA+B  and  Yk2C+D

If  50% of the reaction of X was completed when 96% of the reaction of Y was completed, the ratio of their rate constants k2/k1 is :

57.14% studentsanswered this correctly

Important Questions on Chemical Kinetics

EASY
JEE Main/Advance
IMPORTANT
The rate constant (k), the activation energy and the Arrhenius parameter of a chemical reaction at 25°C are 3.0×10-4 s-1, 104.4 kJ mol-1 and 6.0×1014 s-1, respectively. The value of the rate constant when T is:
EASY
JEE Main/Advance
IMPORTANT
The reactions of higher order are rare because
EASY
JEE Main/Advance
IMPORTANT

Consider this reaction. 2NO2g+O3gN2O5g+O2g

The reaction of nitrogen dioxide and ozone represented in first order in NO2g and O3g. Which of these possible reaction mechanisms is consistent with the rate law? 

Mechanism I. NO2+O3NO3+O2 slow  NO3+NO2N2O5 fast

Mechanism II. O3O2O fast  NO2+ONO3 slow  NO3+NO2N2O5 fast

EASY
JEE Main/Advance
IMPORTANT
Select incorrect statement (s):
MEDIUM
JEE Main/Advance
IMPORTANT
The reaction 2A+B+CD+E is found to the first order in A second in B and zero order in C. How many times rate increases by increasing concentration of A, B and C two times.
HARD
JEE Main/Advance
IMPORTANT
For the elementary reaction 2A+B22AB. Calculate how much the rate of reaction will change if the volume of the vessel is reduced to one third of its original volume?
HARD
JEE Main/Advance
IMPORTANT
A first order reaction 75% completed in 27 min. How long time will it for 87.5% completion.Fill your answer as sum of digits till you get the single digit answer.
HARD
JEE Main/Advance
IMPORTANT
A first order reaction has a rate constant 1.5×10-3 sec-1. How long will 5.0 g of this reactant take to reduce to 1.25 g.Fill your answer as sum of digits till you get the single digit answer.