$A$ reaction $2A \to$ products is found to follow zero order kinetics,then

Which of the following reactions end in finite time?

For a zero-order reaction,the correct expression for rate constant $(k)$ at half-life time $(t_{1/2})$ is ($[R_0] =$ initial concentration of reactant).

Which of the following statements about zero order reaction is not true?

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:

The rate constant for a zero order reaction is $2 \times 10^{-2} \ mol \ L^{-1} \ sec^{-1}$. If the concentration of the reactant after $25 \ sec$ is $0.5 \ M$,the initial concentration must have been ......... $M$.