A first order reaction is $50 \%$ completed in $1.26 \times 10^{14} \mathrm{~s}$. How much time would it take for $100 \%$ completion?
Compounds ' $A$ ' and ' $B$ ' react according to the following chemical equation.
$$\mathrm{A}(\mathrm{~g})+2 \mathrm{~B}(\mathrm{~g}) \longrightarrow 2 \mathrm{C}(\mathrm{~g})$$
Concentration of either ' $A$ ' or ' $B$ ' were changed keeping the concentrations of one of the reactants constant and rates were measured as a function of initial concentration. Following results were obtained. Choose the correct option for the rate equations for this reaction.
| Expereiment | Initial concentration of [A]/mol L$^{-1}$ |
Initial concentration of [B]/mol L$^{-1}$ |
Initial concentration of [C]/mol L$^{-1}$ S$^{-1}$ |
|---|---|---|---|
| 1. | 0.30 | 0.30 | 0.10 |
| 2. | 0.30 | 0.60 | 0.40 |
| 3. | 0.60 | 0.30 | 0.20 |
Which of the following statement is not correct for the catalyst?
The value of rate constant of a pseudo first order reaction ............ .
Consider the reaction $\mathrm{A} \longrightarrow \mathrm{B}$. The concentration of both the reactants and the products varies exponentially with time. Which of the following figures correctly describes the change in concentration of reactants and products with time?
