INTRODUCTION - Chapter 4 - Chemical Kinetics - Intext Solutions - Ncert Solutions class 12 - Chemistry
Updated On 26-08-2025 By Lithanya
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Question 4.1:
For the reaction R → P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and seconds.
Answer:
Average rate of reaction _13-11-08_Utpal_12_Chemistry_4_9_html_7c1ba064.gif)
_13-11-08_Utpal_12_Chemistry_4_9_html_70c2142c.gif)
= 6.67 × 10−6 M s−1
Question 4.2:
In a reaction, 2A → Products, the concentration of A decreases from 0.5 mol L−1 to 0.4 mol L−1 in 10 minutes. Calculate the rate during this interval?
Answer:
Average rate _13-11-08_Utpal_12_Chemistry_4_9_html_m2a103f0e.gif)
_13-11-08_Utpal_12_Chemistry_4_9_html_5e7dae04.gif)
= 0.005 mol L−1 min−1
= 5 × 10−3 M min−1
