Chemical Kinetics Questions

For the reaction X → Y + Z, the rate constant is 0.00058 s–1. What percentage of X will be decomposed in 50 minutes?

Given below are two statements: Statement I: For a zero-order reaction A → B, successive half-life decreases with progress of reaction. Statement II: Rate of zero-order reaction remains unchanged with progress of reaction.

What will be the half-life of the first order reaction for which the value of rate constant is 100 s–1?

Given below are two statements: Statement I: Catalyst increases the rate of reaction by decreasing the activation energy. Statement II: The reaction taking place in one step is known as elementary reaction.

Which one of the following reaction is an example of psedo first order reaction?

In which of the following half life of a reaction does not depends on initial concentration?

Given below are two statements: Statement I: For a zero order reaction, the rate of reaction does not depend on initial concentration of reactant. Statement II: Order and molecularity are always equal in elementary reaction.

The rate constant of a reaction has unit mol–1 L s–1. What is the order of reaction?

How much time is required to complete 90% of a first order reaction?

Given below are two statements: Assertion (A): Rate of reaction increases with increase in temperature. Reason (R): Number of effective collisions increases with increase in temperature.

The rate constant for a first order reaction is 2.303 × 10–2 s–1. The time required to reduce 4 g of the reactant to 2 g is;

If the rate of reaction X → Y doubles on increasing the concentration of X by eight times, the order of reaction is:

If the rate of reaction is expressed as follows: Rate = 1/2 d[C]/dt + 1/3 d[D]/dt = –1/4 d[A]/dt = – d[B]/dt Then the reaction is:

The rate constant for a reaction is 1.5 × 10–4 mol L–1 s–1. The order of the reaction is;

All natural radioactive decay of unstable nuclei takes place by:

For the reaction, P + Q → PQ, the following data is obtained. The overall order of the reaction is:

Given below are two statements: Statement I: Order of reaction can have fractional values. Statement II: Molecularity of a reaction is always a positive integer.

Slope of a plot between log([R]0/[R]) vs time for a first order reaction is:

The correct relation for rate constant (k) at two different temperatures among the following is;

If ‘ao’ is the initial concentration and ‘n’ is the order of the reaction then half life time ‘t1/2’ can be expressed as;

For the reaction, A + B → C + D, the rate expression is R = k[A]²[B]. If the concentration of both the reactants is doubled then the rate of reaction will be;

Threshold energy of a reaction is equal to;