NEETChemistryChemical Kinetics
Which of the following is correct with respect to the graph given? aligned & [R]= Concentration at time ' t ' & [R]₀= Initial concentration aligned
Options
- AI, III represent first order and II represents zero order reaction
- BI, II represent zero order and III represents first order reaction
- CI, II, III all represent zero order reactions
- DI, II, III all represent first order reaction
Correct answer
B. I, II represent zero order and III represents first order reaction
Step-by-step solution
For a zero order reaction :- Rate = K [ A ]^0= K Thus, the rate does not change with concentration. Therefore, I is of zero order reaction. For the integrated rate law of zero order :- C =- kt + C ₀ Thus, the graph II is for a zero order reaction. For a first order reaction:- t = 2.303 ~K [ R ]₀ [ R ] or [ R ]₀ [ R ] = K 2.303 t Thus, III is a graph for a first order reaction.