The formation of gas at the surface of tungsten due to adsorption is a reaction of which order?

$A$ zero-order reaction,$A \rightarrow \text{Product}$,with an initial concentration $[A]_0$ has a half-life of $0.2 \ s$. If one starts with the concentration $2[A]_0$,then the half-life is $.... \ s$

Time required for $100\%$ completion of a zero order reaction is

For a certain reaction $R \to \text{Product}$, the plot of concentration $[R]$ vs time has a negative slope as shown. The order of reaction is:

If the initial concentration of a reactant is $a$,how much time will it take for a $100\%$ zero-order reaction to complete?

For a zero-order reaction,the ratio of $t_{1/2}$ to $t_{3/4}$ is ....