Chemical Kinetics · Chemistry · WB JEE
MCQ (Single Correct Answer)
1
For a first order reaction with rate constant $$\mathrm{k}$$, the slope of the plot of $$\log$$ (reactant concentration) against time is
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2
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)
WB JEE 2023
3
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
WB JEE 2023
4
The equilibrium constant for the reaction
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
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
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5
Under the same reaction conditions, initial concentration of 1.386 mol dm$$-$$3 of a substance becomes half in 40 s and 20 s through first-order and zero-order kinetics respectively. Ratio $$\left( {{{{k_1}} \over {{k_0}}}} \right)$$ of the rate constants for first-order (k1) and zero-order (k0) of the reactions is
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6
2.5 mL 0.4 M weak monoacidic base (Kb = 1 $$\times$$ 10$$-$$12 at 25$$^\circ$$C) is titrated with 2/15 M HCl in water at 25$$^\circ$$C. The concentration of H+ at equivalence point is (Kw = 1 $$\times$$ 10$$-$$14, at 25$$^\circ$$C)
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7
For a reaction 2A + B $$ \to $$ P, when concentration of B alone is doubled, t1/2 does not change and when concentrations of both A and B is doubled, rate increases by a factor of 4. The unit of rate constant is,
WB JEE 2020
8
Consider the following two first order reactions occurring at 298 K with same initial concentration of A :
(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.
(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.
WB JEE 2019
9
The kinetic study of a reaction like vA $$\to$$ P at 300 K provides the following curve, where concentration is taken in mol dm$$-$$3 and time in min.
Identify the correct order (n) and rate constant (k)
Identify the correct order (n) and rate constant (k)
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10
The following equilibrium constants are given
$${N_2} + 3{H_2}$$ $$\rightleftharpoons$$ $$2N{H_3}$$; $${K_1}$$
$${N_2} + {O_2}$$ $$\rightleftharpoons$$ $$2NO$$; $${K_2}$$
$${H_2} + {1 \over 2}{O_2}$$ $$\rightleftharpoons$$ $${H_2}O$$; $${K_3}$$
The equilibrium constant for the oxidation of 2 mole of NH3 to give NO is
$${N_2} + 3{H_2}$$ $$\rightleftharpoons$$ $$2N{H_3}$$; $${K_1}$$
$${N_2} + {O_2}$$ $$\rightleftharpoons$$ $$2NO$$; $${K_2}$$
$${H_2} + {1 \over 2}{O_2}$$ $$\rightleftharpoons$$ $${H_2}O$$; $${K_3}$$
The equilibrium constant for the oxidation of 2 mole of NH3 to give NO is
WB JEE 2018