question_answer

Which one of the following plots is true for the first order decomposition of \[\,{{N}_{2}}{{O}_{5}}\]?

A)     

B)  

C)                     

D)  

Correct Answer: D

Solution :

                 Key Idea If a straight line is obtained in rate versus concentration graph, then the reaction is of first order, ie,                 Rate \[=k\,[R]\] In the following graph, the graph  is true for the first order, decomposition of \[{{N}_{2}}{{O}_{5}}\]. In this graph a straight line is obtained when it is plotted rate versus concentration, ie,                 Rate \[=k\,[{{N}_{2}}{{O}_{5}}]\]                 Rate of decomposition of \[\,{{N}_{2}}{{O}_{5}}\] as a function of \[\,[{{N}_{2}}{{O}_{5}}]\]. Note - In rate = \[k\,\,{{[R]}^{0,}}\] then the reaction is of zero. If rate = \[k\,\,[R]\] then the reaction is of first order. If rate = \[k\,\,{{[R]}^{2}}\], then the reaction is of second order. If rate = \[k\,\,{{[R]}^{3}}\], then the reaction is of third order.