Chemical Kinetics and Nuclear Chemistry · Chemistry · JEE Main

Given below are two statements : Statement I : The rate law for the reaction $$A+B \rightarrow C$$ is rate $$(r)=k[A]^2[B]$$. When the concentration o.

Consider the two different first order reactions given below $$\begin & \mathrm+\mathrm \rightarrow \mathrm \text < (Reaction 1) >\.

Time required for $$99.9 \%$$ completion of a first order reaction is _________ times the time required for completion of $$90 \%$$ reaction.(nearest .

Consider the following single step reaction in gas phase at constant temperature. $$2 \mathrm<~A>_<(\mathrm)>+\mathrm_<(\mathrm)> \rightarrow.

Consider the following reaction, the rate expression of which is given below $$\begin & \mathrm+\mathrm \rightarrow \mathrm \\ & \te.

Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below. Some details of .

The following data were obtained during the first order thermal decomposition of a gas A at constant volume : $\mathrm(\mathrm) \rightarrow 2 \m.

The ratio of $\frac<< >^ \mathrm><< >^ \mathrm>$ in a piece of wood is $\frac$ part that of atmosphere. If half life of $< >^ .

$$\mathrm_2$$ required for a reaction is produced by decomposition of $$\mathrm_2 \mathrm_5$$ in $$\mathrm_4$$ as by equation $$2 \math.

The rate of First order reaction is $$0.04 \mathrm <~mol>\mathrm^ \mathrm^$$ at 10 minutes and $$0.03 \mathrm <~mol>\mathrm^ \.

The half-life of radioisotope bromine - 82 is 36 hours. The fraction which remains after one day is ________ $$\times 10^<-2>$$. (Given antilog $$0.20.

For a reaction taking place in three steps at same temperature, overall rate constant $$\mathrm=\frac<\mathrm_1 \mathrm_2><\mathrm_3>$$.

Time required for completion of $$99.9 \%$$ of a First order reaction is ________ times of half life $$\left(t_<1 / 2>\right)$$ of the reaction.

Consider the following data for the given reaction $$2 \mathrm_<(\mathrm)> \rightarrow \mathrm_<2(\mathrm<~g>)>+\mathrm_<2(\mathrm<~g>)>$.

A(g) $$\to$$ 2B(g) + C(g) is a first order reaction. The initial pressure of the system was found to be 800 mm Hg which increased to 1600 mm Hg after .

$$\mathrm_$$ is the time required for the reaction to undergo $$87.5 \%$$ completion and $$\mathrm_$$ is the time required for the rea.

The reaction $$2 \mathrm+\mathrm_ \rightarrow 2 \mathrm$$ takes places through the mechanism given below: $$\mathrm+\mathrm_

The number of incorrect statement/s from the following is ___________ A. The successive half lives of zero order reactions decreases with time. B. A s.

A molecule undergoes two independent first order reactions whose respective half lives are 12 min and 3 min. If both the reactions are occurring then .

The number of given statement/s which is/are correct is __________. (A) The stronger the temperature dependence of the rate constant, the higher is th.

A and B are two substances undergoing radioactive decay in a container. The half life of A is 15 min and that of B is 5 min. If the initial concentrat.

The rate constant for a first order reaction is $20 \mathrm<~min>^$. The time required for the initial concentration of the reactant to reduce to .

A $$\to$$ B The rate constants of the above reaction at 200 K and 300 K are 0.03 min$$^<-1>$$ and 0.05 min$$^<-1>$$ respectively. The activation energ.

An organic compound undergoes first-order decomposition. If the time taken for the $60 \%$ decomposition is $540 \mathrm<~s>$, then the time required .

If compound A reacts with B following first order kinetics with rate constant $$2.011 \times 10^ <-3>\mathrm^$$. The time taken by $$\mathrm

For conversion of compound A $$\to$$ B, the rate constant of the reaction was found to be $$\mathrm~L~mol^~s^>$$. The order o. JEE Main 2023 (Online) 29th January Morning Shift

For certain chemical reaction $$X\to Y$$, the rate of formation of product is plotted against the time as shown in the figure. The number of $$\mathrm.

A first order reaction has the rate constant, $$\mathrm~s^>$$. The number of correct statement/s from the following is/are ____. JEE Main 2023 (Online) 25th January Morning Shift

For the first order reaction A $$\to$$ B, the half life is 30 min. The time taken for 75% completion of the reaction is _________ min. (Nearest intege.

The number of correct statement/s from the following is __________ A. Larger the activation energy, smaller is the value of the rate constant. B. The .

Assuming $$1 \,\mu \mathrm$$ of trace radioactive element X with a half life of 30 years is absorbed by a growing tree. The amount of X remaining i.

The reaction between X and Y is first order with respect to X and zero order with respect to Y. .tg .tg.

For a reaction, given below is the graph of $$\ln k$$ vs $$<1 \over T>$$. The activation energy for the reaction is equal to ____________ $$\mathrm

$$2 \mathrm+2 \mathrm_ \rightarrow \mathrm_+2 \mathrm_ \mathrm$$ The above reaction has been studied at $$800^ \mathrm.

For the decomposition of azomethane. CH3N2CH3(g) $$\to$$ CH3CH3(g) + N2(g), a first order reaction, the variation in partial pressure with time at 600.

For the reaction P $$\to$$ B, the values of frequency factor A and activation energy EA are 4 $$\times$$ 1013 s$$-$$1 and 8.3 kJ mol$$-$$1 respectivel.

The equation k = (6.5 $$\times$$ 1012s$$-$$1)e$$-$$26000K/T is followed for the decomposition of compound A. The activation energy for the reaction is.

The activation energy of one of the reactions in a biochemical process is 532611 J mol$$-$$1. When the temperature falls from 310 K to 300 K, the chan.

A radioactive element has a half life of 200 days. The percentage of original activity remaining after 83 days is ___________. (Nearest integer) (Give.

For a first order reaction A $$\to$$ B, the rate constant, k = 5.5 $$\times$$ 10$$-$$14 s$$-$$1. The time required for 67% completion of reaction is x.

It has been found that for a chemical reaction with rise in temperature by 9 K the rate constant gets doubled. Assuming a reaction to be occurring at .

The rate constant for a first order reaction is given by the following equation: $$\ln k = 33.24 - <<2.0 \times <<10>^4>\,K> \over T>$$ The activation. JEE Main 2022 (Online) 26th June Evening Shift

Catalyst A reduces the activation energy for a reaction by 10 kJ mol$$-$$1 at 300 K. The ratio of rate constants, $$<^kT,\,Catalysed> \over ^kT. JEE Main 2022 (Online) 26th June Morning Shift

A flask is filled with equal moles of A and B. The half lives of A and B are 100 s and 50 s respectively and are independent of the initial concentrat.

At 345 K, the half life for the decomposition of a sample of a gaseous compound initially at 55.5 kPa was 340 s. When the pressure was 27.8 kPa, the h.

For a given chemical reaction $$\gamma$$1A + $$\gamma$$2B $$\to$$ $$\gamma$$3C + $$\gamma$$4D Concentration of C changes from 10 mmol dm$$-$$3 to 20 m.

The rate constants for decomposition of acetaldehyde have been measured over the temperature range 700 - 1000 K. The data has been analysed by plottin.

For the reaction A $$\to$$ B, the rate constant k(in s$$-$$1) is given by$$<\log _<10>>k = 20.35 - <<(2.47 \times <<10>^3>)> \over T>$$The energy of a.

For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is ____________. (Integer answer)

According to the following figure, the magnitude of the enthalpy change of the reactionA + B $$\to$$ M + N in kJ mol$$-$$ is equal to ___________. (In.

The first order rate constant for the decomposition of CaCO3 at 700 K is 6.36 $$\times$$ 10$$-$$3s$$-$$1 and activation energy is 209 kJ mol$$-$$1. It.

The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is $$2C + 8.

The following data was obtained for chemical reaction given below at 975 K.2NO(g) + 2H2(g) $$\to$$ N2(g) + 2H2O(g)The order of the reaction with respe.

For the first order reaction A $$\to$$ 2B, 1 mole of reactant A gives 0.2 moles of B after 100 minutes. The half life of the reaction is __________ mi.

For a chemical reaction A $$\to$$ B, it was found that concentration of B is increased by 0.2 mol L$$-$$ in 30 min. The average rate of the reaction i.

$$> \to 2N> + >$$In the above first order reaction the initial concentration of N2O5 is 2.40 $$\times$$ 10$.

$$PC(g) \to PC(g) + C(g)$$In the above first order reaction the concentration of PCl5 reduces from initial concentration 50 mol L$$-$$1.

The inactivation rate of a viral preparation is proportional to the amount of virus. In the first minute after preparation, 10% of the virus is inacti.

A reaction has a half life of 1 min. The time required for 99.9% completion of the reaction is _________ min. (Round off to the Nearest Integer). [Use.

2NO(g) + Cl2(g) $$\rightleftharpoons $$ 2NOCl(s) This reaction was studied at $$-$$10$$^\circ$$ and the following data was obtained Run $$.

The reaction 2A + B2 $$ \to $$ 2AB is an elementary reaction.For a certain quantity of reactants, if the volume of the reaction vessel is reduced by a.

For a certain first order reaction 32% of the reactant is left after 570s. The rate constant of this reaction is _________ $$\times$$ 10$$-$$3 s$$-$$1.

A and B decompose via first order kinetics with half-lives 54.0 min and 18.0 min respectively. Starting from an equimolar non reactive mixture of A an.

The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at 300 K is 1.0 $$\times$$ 10$$-$$3 s$$-$$1 and th.

If the activation energy of a reaction is 80.9 kJ mol$$-$$1, the fraction of molecules at 700 K, having enough energy to react to form products is e$$.

The rate constant of a reaction increases by five times on increase in temperature from 27$$^\circ$$C to 52$$^\circ$$C. The value of activation energy.

For the reaction, aA + bB $$ \to $$ cC + dD, the plot of log k vs $$<1 \over T>$$ is given below :The temperature at which the rate constant of the re.

Sucrose hydrolyses in acid solution into glucose and fructose following first order rate law with a half-life of 3.33 h at 25$$^\circ$$C. After 9 h, t.

Gaseous cyclobutene isomerises to butadiene in a first order process which has a 'k' value of 3.3 $$ \times $$ 10-4 s-1 at 153°C. The time in minutes .

The rate of a reaction decreased by 3.555 times when the temperature was changed from 40oC to 30oC. The activation energy (in kJ mol–1) of the reactio.

The number of molecules with energy greater than the threshold energy for a reaction increases five fold by a rise of temperature from 27oC to 42oC. I.

If 75% of a first order reaction was completed in 90 minutes, 60% of the same reaction would be completed in approximately (in minutes) _______. (Take.

A sample of milk splits after 60 min. at 300 K and after 40 min. at 400 K when the population of lactobacillus acidophilus in it doubles. The activa t.

During the nuclear explosion, one of the products is 90Sr with half life of 6.93 years. If 1 $$\mu $$ g of 90Sr was absorbed in the bones of newly bor.

MCQ (Single Correct Answer)

For a reaction $$A \xrightarrow<\mathrm_1> \mathrm \xrightarrow<\mathrm_2> \mathrm$$ If the rate of formation of B is set to be zero then.

_<\mathrm>$$ is initial pressure and $$\mathrm

_.