If rate constant is numerically the same for the three reactions of first, second and third order respectively. Assume all the reactions of the kind $\mathrm{A}\to$ products. Which of the following is correct:

What will be the order of reaction and rate constant for a chemical change having ${\mathrm{logt}}_{50\%}\mathrm{Vs}$. log concentration $\left(\mathrm{a}\right)$ curves as ?

For a reaction, $2\mathrm{A}+\mathrm{B}⟶$product, rate law is

$-\frac{\mathrm{d}\left[\mathrm{A}\right]}{\mathrm{dt}}=\mathrm{k}\left[\mathrm{A}\right]$

At a time when $\mathrm{t}=\frac{1}{\mathrm{k}}$, concentration of the reactant is (${\mathrm{C}}_0=$initial concentration)

A reaction follows the given concentration-time graph. The rate for this reaction at $20$ seconds will be: