NEET Chemistry Chemical Kinetics MCQs

Which of the following statements is TRUE regarding the half-life of a zero-order reaction?

For a first-order reaction with rate constant $k$, how long does it take for 99% of the reaction to complete?

The rate constant of a first-order reaction is $k$. If the initial concentration is $[A]_0$, what will be the time taken for the concentration to reduce to 1% of $[A]_0$?

A first-order reaction is 99% complete in time $t$. What is the rate constant $k$ for this reaction?

The half-life of a first-order reaction is $t_{1/2}$. How long will it take for the reaction to be 99% complete?

For a first-order radioactive decay with rate constant $\lambda$, what percentage of the initial radioactive nuclei will remain after a time $t = \frac{4.605}{\lambda}$?

For the reaction $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$, which of the following affects the equilibrium constant $K_c$?

The equilibrium constant $K_c$ for the reaction $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$ is 0.5 at 400°C. What will happen to the equilibrium if the temperature is increased, assuming the reaction is exothermic?

For the reaction $\frac{1}{2}N_2(g) + \frac{3}{2}H_2(g) \rightleftharpoons NH_3(g)$, how is the equilibrium constant $K'_c$ related to the $K_c$ of the reaction $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$?

Which of the following is not true about the equilibrium constant $K_c$ for the reaction $N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$?