List of top Chemistry Questions on Half life asked in MHT CET

For a reaction, \( A \to B \), rate equation is \( r = k[A]^0 \). If initial concentration of reactant is \( a \) mol dm\(^{-3}\), find the half-life time of the reaction.
Which of the following is NOT dihydric phenol?
What is half life of a first order reaction if time required to decrease concentration of reactant from 0.4 M to 0.1 M is $x$ hour?
Half-life of a first-order reaction is 20 minutes. The time taken to reduce the initial concentration of the reactant to \( \left(\frac{1}{10}\right)^{\text{th}} \) of its initial value is \( \rule{1cm}{0.15mm} \).
What is half life of a first order reaction if time required to decrease concentration of reactant from 0.4 M to 0.1 M is $x$ hour?
Which of the following is NOT dihydric phenol?
What is half life of a first order reaction if time required to decrease concentration of reactant from 0.4 M to 0.1 M is $x$ hour?
If half life of a first order reaction is 10 minutes, find the time required to decrease concentration of reactant from $0.08 \text{ M}$ to $0.02 \text{ M}$.
What is rate constant of a first order reaction having half life \(138.6 \text{ minute}\)?
Bismuth has a half-life period of $5$ days. A sample originally has a mass of $1000\text{ mg}$, then the mass of Bismuth after $30$ days is
In a first order reaction, concentration of reactant is reduced to (1/8)th of concentration in 23.03 minutes. What is half-life period of reaction?
If the half life period of a substance is 5 years, then the total amount of the substance left after 15 years, when initial amount is 64 gms is
What is the half-life of a first order reaction if time required to decrease concentration of reactant from 1.0 M to 0.25 M is 10 hour?
Half life for a first order reaction is 6.93 hour. What is the time required for 80% completion of the reaction?
In a first order reaction, concentration of reactant is reduced to (1/8)th of concentration in 23.03 minutes. What is half-life period of reaction?
If half life of a first order reaction is 10 minutes, find the time required to decrease concentration of reactant from $0.08 \text{ M}$ to $0.02 \text{ M}$.
Calculate the half-life of a first order reaction if the rate constant of the reaction is $2.772 \times 10^{-3}\,\text{s}^{-1}$.
The half-life of a first order reaction is 6.0 hours. How long does it take for 60% of the reactant to disappear?