Question

Statement-1 : The ratio of for third order reaction is equal to 5 : 1

Statement-2 : t1/2& t3/4 of a reaction depends only on order, not on the concentration of reactant.

• A. Statement 1 and statement 2 are correct and statement 2 is the correct explanation of statement 1.
• B. Statement 1 and statement 2 are correct but the statement 2 is not correct explanation of statement 1.
• C. Statement 1 is correct but statement 2 is false.
• D. Statement 1 is false but statement 2 is correct.

Answer 1

Answer: (C)

Statement 1 is correct but statement 2 is false.

Answer 2

$\frac{t_{1/2}}{t_{3/4}} = \frac{2^{n - 1} - 1}{4^{n - 1} - 1} \Rightarrow \frac{t_{3/4}}{t_{1/2}} = \frac{4^{n - 1} - 1}{2^{n - 1} - 1} = \frac{4^{2} - 1}{2^{2} - 1} = \frac{15}{3} = 5:1$

}{\Rightarrow t_{3/4} = \frac{4^{n - 1} - 1}{|A|_{0}^{n - 1}K^{(n - 1)}}}$$