English
Karnataka Board PUCPUC Science 2nd PUC Class 12

A reaction is first order in A and second order in B. Write the differential rate equation.

Advertisements
Advertisements

Question

A reaction is first order in A and second order in B. Write the differential rate equation.

Very Short Answer
Advertisements

Solution

Reaction is first order in A and second order in B, hence the differential rate equation is:

`dx/dt` = k[A][B]2

shaalaa.com
  Is there an error in this question or solution?

RELATED QUESTIONS

Define “zero order reaction”.


What is pseudo first order reaction? Give one· example of it.


Write molecularity of the following reaction:

2NO(g)+O2(g)→2NO2(g)


For a reaction : 

(i) Write the order and molecularity of this reaction.

(ii) Write the unit of k.


The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :

SO2Cl2 (g) → SO2 (g) + Cl2 (g)

Experiment Time/s–1 Total pressure/atm
1 0 0.4
2 100 0.7

Calculate the rate constant.

(Given : log 4 = 0.6021, log 2 = 0.3010)


The conversion of molecules X to Y follows second order kinetics. If concentration of X is increased to three times how will it affect the rate of formation of Y?


In a reaction between A and B, the initial rate of reaction (r0) was measured for different initial concentrations of A and B as given below:

A/mol L−1 0.20 0.20 0.40
B/mol L−1 0.30 0.10 0.05
r0/mol L−1 s−1 5.07 × 10−5 5.07 × 10−5 1.43 × 10−4

What is the order of the reaction with respect to A and B?


Write the principle behind the following methods of refining:

Hydraulic washing


Define the following term:

Pseudo first-order reaction


For a complex reaction:

(i) order of overall reaction is same as molecularity of the slowest step.

(ii) order of overall reaction is less than the molecularity of the slowest step.

(iii) order of overall reaction is greater than molecularity of the slowest step.

(iv) molecularity of the slowest step is never zero or non interger.


For a general reaction A → B, plot of concentration of A vs time is given in figure. Answer the following question on the basis of this graph.

(i) What is the order of the reaction?

(ii) What is the slope of the curve?

(iii) What are the units of rate constant?


Why can’t molecularity of any reaction be equal to zero?


Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?


Why can we not determine the order of a reaction by taking into consideration the balanced chemical equation?


Match the graph given in Column I with the order of reaction given in Column II. More than one item in Column I may link to the same item of Column II.

  Column I Column II
(i)  
(ii)  (a) 1st order
(iii) (b) Zero-order
(iv)    

Assertion: Order of the reaction can be zero or fractional.

Reason: We cannot determine order from balanced chemical equation.


Assertion: Rate constants determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason: Reactant molecules undergo chemical change irrespective of their orientation during collision.


In the presence of a catalyst, the heat evolved or absorbed during the reaction.


For a reaction R → p the concentration of reactant change from 0.03 m to 0.02 m in minute, calculate the average rate of the reaction using the unit of second.


If the 0.05 molar solution of m+ is replaced by a 0.0025 molar m+ solution, then the magnitude of the cell potential would be


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×