Chemistry
Chemical Kinetics and Nuclear Chemistry
Previous Years Questions

Match the rate expressions in LIST-I for the decomposition of $X$ with the corresponding profiles provided in LIST-II. $X_{\mathrm{s}}$ and $\mathrm{k... For the elementary reaction M $$\to$$ N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of ... The value of d in cm (shown in the figure), as estimated from Graham's law, is The experimental value of d is found to be smaller than the estimate obtained using Graham's law. This is due to In the reaction, P + Q $$\to$$ R + S, the time taken for 75% reaction of P is twice the time taken for 50% reaction of P. The concentration of Q varie... Plots showing the variation of the rate constant ($$k$$) with temperature ($$T$$) are given below. The point that follows Arrhenius equation is ## MCQ (More than One Correct Answer) For the following reaction, $$2X + Y\buildrel k \over \longrightarrow P$$ the rate of reaction is $${{d[P]} \over {dt}} = k[X]$$. Two moles of X are ... Which of the following plots is(are) correct for the given reaction?([P]0 is the initial concentration of P)... In the decay sequence. x1, x2, x3 and x4 are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)... For a first order reaction $$A\left( g \right) \to 2B\left( g \right) + C\left( g \right)$$ at constant volume and $$300K,$$ the total pressure at the... In a bimolecular reaction, the steric factor $$P$$ was experimentally determined to be $$4.5.$$ The correct option(s) among the following is (are) According to the Arrhenius equation, A plot of the number of neutrons (N) against the number of protons (P) of stable nuclei exhibits upward deviation from linearity for atomic number, Z ... The % yield of ammonia as a function of time in the reaction N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g), $$\Delta$$H < 0 at (P, T1) is given bel... In the nuclear transmutation 9Be4 + X $$\to$$ 8Be4 + Y (X, Y) is (are) For the first order reaction 2N2O5 (g) $$\to$$ 4NO2 (g) + O2 (g) ## Numerical $$_{92}^{238}U$$ is known to undergo radioactive decay to form $$_{82}^{206}Pb$$ by emitting alpha and beta particles. A rock initially contained 68$...
The decomposition reaction$$2{N_2}{O_5}(g)\buildrel \Delta \over \longrightarrow 2{N_2}{O_4}(g) + {O_2}(g)$$ is started in a closed cylinder under i...
Consider the kinetic data given in the following table for the reaction A + B + C $$\to$$ Product. The rate of the reaction for [A] = 0.15 mol dm-3,...
Consider the following reversible reaction, $$A\left( g \right) + B\left( g \right) \to AB\left( g \right).$$ The activation energy of the backward r...
A closed vessel with rigid walls contains 1 mol of $${}_{92}^{238}U$$ and 1 mol of air at 298 K. Considering complete decay of $${}_{92}^{238}U$$ to \$...
In dilute aqueous H2SO4, the complex diaquodioxalatoferrate(II) is oxidized by $$MnO_4^-$$. For this reaction, the ratio of the rate of change of [H+]...
The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons undergoes a nuclear reaction yielding element X as shown b...
An organic compound undergoes first-order decomposition. The time taken for its decomposition to 1/8 and 1/10 of its initial concentration are t1/8 an...
The concentration of R in the reaction R $$\to$$ P was measured as a function of time and the following data is obtained .tg {border-collapse:colla...
The number of neutrons emitted when $${}_{92}^{235}U$$ undergoes controlled nuclear fission to $${}_{54}^{142}Xe$$ and $${}_{38}^{90}Sr$$ is

## Subjective

At constant temperature and volume, X decomposes as 2X(g) $$\to$$ 3Y(g) + 2Z(g); Px is the partial pressure of X. .tg {border-collapse:collapse;bo...
For the given reactions, A + B $$\to$$ Products, following data were obtained .tg {border-collapse:collapse;border-spacing:0;margin: 0 auto} .tg td...
The rate of a first order reaction is 0.04 mol litre-1 s-1 at 10 minutes and 0.03 mol litre-1 s-1 at 20 minutes after initiation. Find the half-life o...
The vapour pressure of the two miscible liquids (A) and (B) are 300 and 500 mm of Hg respectively. In a flask 10 moles of (A) is mixed with 12 moles o...
A hydrogenation reaction is carried out at 500 K. If the same reaction is carried out in the presence of a catalyst at the same rate, the temperature ...
The rate constant for an isomerisation reaction, A $$\to$$ B is 4.5 $$\times$$ 10-3 min-1. If the initial concentration of A is 1 M, calculate the rat...
The rate constant of a reaction is 1.5 $$\times$$ 107 s-1 at 50oC and 4.5 $$\times$$ 107 s-1 at 100oC. Evaluate the Arrhenius parameters A and Ea....
The ionisation constant of $$NH_4^+$$ in water is 5.6 $$\times$$ 10-10 at 25oC. The rate constant for the reaction of $$NH_4^+$$ and $$OH^-$$ to form ...
At 380oC, the half-life period for the first order decomposition of H2O2 is 360 min. Calculate the time required for 75% decomposition at 450oC....
A first order reaction A $$\to$$ B, requires activation energy of 70 kJ mol-1. When 20% solution of A was kept at 25oC for 20 minutes, 25% decompositi...
The decomposition of N2O5 according to the equation: 2N2O5 (g) $$\to$$ 4NO2(g) + O2(g) is a first order reaction. After 30 min. from the start of the ...
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