Chemical Kinetics and Nuclear Chemistry

For the reaction system: 2NO(g) + O₂(g) $\to$ 2NO₂(g) volume is suddenly reduce to half its value by increasing the pressure on it. If the reaction is of first order with respect to O₂ and second order with respect to NO, the rate of reaction will

In a first order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is

A reaction involving two different reactants can never be

t_1/4 can be taken as the time taken for the concentration of a reactant to drop to $3 \over 4$ of its initial value. If the rate constant for a first order reaction is K, the t_1/4 can be written as

The following mechanism has been proposed for the reaction of NO with Br₂ to form NOBr: NO(g) + Br₂ (g) $\leftrightharpoons$ NOBr₂ (g) NOBr₂ (g) + NO (g) $\to$ 2NOBr (g) If the second step is the rate determining step, the order of the reaction with respect to NO(g) is

The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2=0.301) :

The time for half life period of a certain reaction A $\to$ products is 1 hour. When the initial concentration of the reactant ‘A’, is 2.0 mol L^–1, how much time does it take for its concentration to come from 0.50 to 0.25 mol L^–1 if it is a zero order reaction ?

For a first order reaction, (A) $\to$ products, the concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of A is 0.01 M is :

Higher order (>3) reactions are rare due to

Consider the following nuclear reactions ${}_{92}^{238}M \to {}_Y^XN + 2{}_2^4He$ ${}_Y^XN \to {}_B^AL + 2{\beta ^ + }$ The number of neutrons in the element L is