The half-life of a first-order reaction is
- AIndependent of the initial concentration of the reactant
- BDirectly proportional to the initial concentration of the reactants
- CInversely proportional to the initial concentration of the reactant
- DDirectly proportional to the square of the initial concentration of the reactant
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Similar Questions
For a homogeneous gaseous reaction $A_{(g)} \to 3B_{(g)}$,if the pressure after time $t$ is $P_t$ and after completion of the reaction the pressure is $P_\infty$,select the correct relation for the rate constant $K$.
Difficult
View SolutionFor the thermal decomposition of $N_2O_{5(g)}$ at constant volume,the following table can be formed for the reaction mentioned below:
$2N_2O_{5(g)} \rightarrow 2N_2O_{4(g)} + O_{2(g)}$
$S.NO$ $Time/s$ Total pressure $(atm)$ $1.$ $0$ $0.6$ $2.$ $100$ $X$
$X = . . . . . . \times 10^{-3} \ atm$ [nearest integer]
Given: Rate constant for the reaction is $4.606 \times 10^{-2} \ s^{-1}$.
$2N_2O_{5(g)} \rightarrow 2N_2O_{4(g)} + O_{2(g)}$
| $S.NO$ | $Time/s$ | Total pressure $(atm)$ |
| $1.$ | $0$ | $0.6$ |
| $2.$ | $100$ | $X$ |
$X = . . . . . . \times 10^{-3} \ atm$ [nearest integer]
Given: Rate constant for the reaction is $4.606 \times 10^{-2} \ s^{-1}$.
DifficultJEE MAIN 2025
View SolutionAfter how many seconds will the concentration of the reactant in a first order reaction be halved if the rate constant is $1.155 \times 10^{-3} \ s^{-1}$?
DifficultMHT CET 2008
View SolutionIn a first-order reaction,the concentration of the reactant decreases from $1.0 \, M$ to $0.25 \, M$ in $20 \, \text{minutes}$. What will be the rate constant of the reaction?
Medium
View Solution$A$ first order reaction takes $40 \ min$ for $30 \%$ decomposition. Calculate $t_{1/2}$.
Medium
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