Q. For the reaction: A → products, the concentration of A decreases from 0.8 M to 0.4 M in 10 minutes. If the reaction is first-order, the rate constant is:

प्रतिक्रिया के लिए: A → उत्पाद, A की सांद्रता 10 मिनट में 0.8 M से घटकर 0.4 M हो जाती है। यदि प्रतिक्रिया प्रथम-क्रम है, तो दर स्थिरांक है:

0.069 min⁻¹
0.069 मिनट⁻¹

0.693 min⁻¹
0.693 मिनट⁻¹

0.0693 min⁻¹
0.0693 मिनट⁻¹

0.0069 min⁻¹
0.0069 मिनट⁻¹

First-order integrated rate law:

\ln \frac{[A]_0}{[A]} = kt

\ln \frac{0.8}{0.4} = k \times 10 \Rightarrow \ln 2 = 10 k \Rightarrow k = \frac{0.693}{10} = 0.0693 {min}^{- 1}

Your support helps keep Exam Achiever 100% free for students preparing for exams.

Thanks for your support!

Your support helps keep Exam Achiever 100% free for students preparing for exams.

Thanks for your support!

Take our Free timed mock tests to sharpen your skills and boost your confidence!