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On March 11, 2024, 11:35 AM

INTRODUCTION - Chapter 4 Chemical Kinetics Intext Solutions class 12 ncert solutions Chemistry - SaraNextGen [2024]


 

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 https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/263/6313/NCERT(INTEXT)_13-11-08_Utpal_12_Chemistry_4_9_html_7c1ba064.gif

https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/263/6313/NCERT(INTEXT)_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 https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/263/6314/NCERT(INTEXT)_13-11-08_Utpal_12_Chemistry_4_9_html_m2a103f0e.gif

https://img-nm.mnimgs.com/img/study_content/curr/1/12/17/263/6314/NCERT(INTEXT)_13-11-08_Utpal_12_Chemistry_4_9_html_5e7dae04.gif

= 0.005 mol L−1 min−1

= 5 × 10−3 M min−1

Also Read : Page-No-103:-Chapter-4-Chemical-Kinetics-Intext-Solutions-class-12-ncert-solutions-Chemistry

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