Chemical Kinetics · Chemistry · WB JEE
MCQ (Single Correct Answer)
For a chemical reaction, half-life period $\left(t_{\frac{1}{2}}\right)$ is 10 minutes. How much reactant will be left after 20 minutes if one starts with 100 moles of reactant and the order of the reaction be (i) zero, (ii) one and (iii) two?
An egg takes 4.0 minutes to boil at sea level where the boiling point of water is $T_1 K$, where as it takes 8.0 minutes to boil on a mountain top where the boiling point of water is $\mathrm{T}_2 \mathrm{~K}$. The activation energy for the reaction that takes place during the boiling of egg is
For a first order reaction with rate constant $$\mathrm{k}$$, the slope of the plot of $$\log$$ (reactant concentration) against time is
Which of the following would give a linear plot?
(k is the rate constant of an elementary reaction and T is temp. in absolute scale)
For the reaction A + B $$\to$$ C, we have the following data:
| Initial concentration of A (in molarity) | Initial concentration of B (in molarity) | Rate (initial) (Relevant unit) |
|---|---|---|
| 1 | 10 | 100 |
| 1 | 1 | 1 |
| 10 | 1 | 10 |
The order of the reaction with respect to A and B are
N2(g) + O2(g) $$\rightleftharpoons$$ 2NO(g) is 4 $$\times$$ 10$$-$$4 at 2000 K. In presence of a catalyst the equilibrium is attained 10 times faster. Therefore, the equilibrium constant, in presence of the catalyst at 2000 K is
(1) A $$\to$$ B; rate constant, k = 0.693 min$$-$$1
(2) A $$\to$$ C; half-life, t1/2 = 0.693 min
Choose the correct option.
Identify the correct order (n) and rate constant (k)
$${N_2} + 3{H_2}$$ $$\rightleftharpoons$$ $$2N{H_3}$$; $${K_1}$$
$${N_2} + {O_2}$$ $$\rightleftharpoons$$ $$2NO$$; $${K_2}$$
$${H_2} + {1 \over 2}{O_2}$$ $$\rightleftharpoons$$ $${H_2}O$$; $${K_3}$$
The equilibrium constant for the oxidation of 2 mole of NH3 to give NO is