Question:
The time required for completion of 93.75% of a first order reaction is $x$ minutes. The half-life of it (in minutes) is
The time required for completion of 93.75% of a first order reaction is $x$ minutes. The half-life of it (in minutes) is
Show Hint
Remember the percentage completion to half-life equivalents: 93.75% = 4 half-lives.
Updated On: May 19, 2025
- $x/8$
- $x/2$
- $x/4$
- $x/3$
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
For a first order reaction, time for 93.75% completion = 4 half-lives ($t = 4t_{1/2}$)
So, $x = 4t_{1/2} \Rightarrow t_{1/2} = x/4$
So, $x = 4t_{1/2} \Rightarrow t_{1/2} = x/4$
Was this answer helpful?
0
0
Top Questions on Chemical Kinetics
- Assertion (A): Molecularity of reaction is determined experimentally. Reason (R): Molecularity is applicable only for an elementary reaction and not for a complex reaction.
- CBSE CLASS XII - 2025
- Chemistry
- Chemical Kinetics
- If the rate constant is measured in per second, which reaction order does this indicate?
- AIIMS Paramedical - 2025
- Chemistry
- Chemical Kinetics
- What is the correct unit for the rate constant in a first-order reaction?
- AIIMS Paramedical - 2025
- Chemistry
- Chemical Kinetics
- The thermal decomposition of an acid is a first-order reaction with a rate constant of \(2.3 \times 10^{-5}\ \text{s}^{-1}\) at a certain temperature. Calculate how long it will take for three-fourths of the initial quantity of acid to decompose. (\(\log 4 = 0.6021\), \(\log 2 = 0.3010\))
- CBSE Compartment XII - 2025
- Chemistry
- Chemical Kinetics
- The molecule A changes into its isomeric form B by following a first order kinetics at a temperature of 1000 K. If the energy barrier with respect to reactant energy for such isomeric transformation is 191.48 kJ mol\(^{-1}\) and the frequency factor is \(10^{20}\), the time required for 50% molecules of A to become B is ________________________ picoseconds (nearest integer). [R = 8.314 J K\(^{-1}\) mol\(^{-1}\)]
- JEE Main - 2025
- Chemistry
- Chemical Kinetics
View More Questions
Questions Asked in AP EAPCET exam
- If $$ \int \frac{dx}{1 - \sin^4 x} = A \tan x + B \tan^{-1}(\sqrt{2} \tan x) + C, $$ then find $ A^2 - B^2 $.
- AP EAPCET - 2025
- Integration
- In compound (X), hyperconjugation is present and in (Y), resonance effect is present. What are X and Y, respectively?
- AP EAPCET - 2025
- Organic Chemistry
- A family consists of 8 persons. If 4 persons are chosen at random and they are found to be 2 men and 2 women, then the probability that there are equal numbers of men and women in that family is:
- AP EAPCET - 2025
- Probability
- The total maximum number of electrons possible in 3d, 6d, 5s and 4f orbitals with \(m_l\) (magnetic quantum number) value -2 is
- AP EAPCET - 2025
- Atomic Structure
- If \[ A = \begin{bmatrix} 1 & -1 & 2 \\ -2 & 3 & -3 \\ 4 & -4 & 5 \end{bmatrix} \] and \( A^T \) represents the transpose of \( A \), then calculate \( AA^T - A - A^T \).
- AP EAPCET - 2025
- Matrices
View More Questions