For a reaction 2A + B $$ \to $$ P, when concentration of B alone is doubled, t_1/2 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,

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, t_1/2 = 0.693 min

Choose the correct option.

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)

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