Question

First order decomposition of
$R⟶P$
The time taken for its decomposition to ${\frac{1}{2}}^{th}$ and ${\frac{3}{4}}^{th}$ of its initial concentration are $t_{\frac{1}{2}}$ and $t_{\frac{3}{4}}$ respectively. What is the value of $\frac{\left[t_{1/2}\right]}{\left[t_{3/4}\right]}\times 10?(lo{g}_{10}2=0.3)$

Answer 1

For first order reaction$\to$ $t_{1/2}$=$\frac{0.693}{k}$
$2\times t_{1/2}=t_{3/4}$
$\frac{t_{1/2}}{2\times t_{1/2}}\times 10=5$