If 75% of a first order reaction was completed in 90 minutes, 60% of the same reaction would be completed in approximately (in minutes)_______.

Consider the given plots for a reaction obeying Arrhenius equation $\left(0^{\circ} \mathrm{C}<\mathrm{T}<300^{\circ} \mathrm{C}\right)$ : ( k and $\mathrm{E}_{\mathrm{a}}$ are rate constant and activation energy, respectively)
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A sample of milk splits after 60 min. at 300 K and after 40 min. at 400 K when the population of lactobacillus acidophilus in...

The reaction $2 X \rightarrow B$ is a zeroth order reaction. If the initial concentration of $X$ is $0.2 M$, the half-life is $6 h$....

Consider the following plots of rate constant versus $\frac{1}{\top}$ for four different reactions. Which of the following orders is correct for the activation energies of...

During the nuclear explosion, one of the products is ${ }^{90} \mathrm{Sr}$ with half life of 6.93 years. If $1 \mu \mathrm{~g}$ of $...

The reaction rate for the reaction| $$ \left[\mathrm{PtCl}_4\right]^{2-}+\mathrm{H}_2 \mathrm{O} \rightleftharpoons\left[\mathrm{Pt}\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{Cl}_3\right]^{-}+\mathrm{Cl}^{-} $$ was measured as a function of concentrations of different species. It was...

SECTION-B The first order rate constant for the decomposition of $\mathrm{CaCO}_3$ at 700 K is $6.36 \times 10^{-3} \mathrm{~s}^{-1}$ and activation energy is $...

For the reaction $\mathrm{A} \rightarrow \mathrm{B}$, the rate constant $\mathrm{k}\left(\right.$ in $\left.\mathrm{s}^{-1}\right)$ is given by
$$ \log _{10} k=20.35-\frac{\left(2.47 \times 10^3\right)}{T} $$
The energy of...