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Chemical Kinetics and Nuclear Chemistry

34 questions · Chemistry · JEE Advanced
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Chemical Kinetics and Nuclear Chemistry

34 questions · Chemistry · JEE Advanced

  1. Consider a reaction A+R→ Product. The rate of this reaction is measured to be k[A][R]. At the start of the reaction, the concentration of R,[R]0​, is 10-times the concentration of A,[A]0​. The reaction can be considered…2025 · Shift 2 · Q12 · Numerical
  2. Consider the following reaction, 2H2​( g)+2NO(g)→N2​( g)+2H2​O(g) which follows the mechanism given below : 2NO(g)k−1​⇌​k1​​N2​O2​( g)N2​O2​( g)+H2​( g)k2​​ N2​O(g)+H2​O(g)N2​O(g)+H2​( g)k3​​ N2​( g)+H2​O(g)​ (fast equlibrium)  (slow reaction)  (fast reaction) ​…2024 · Shift 1 · Q9 · Numerical
  3. A sample initially contains only U-238 isotope of uranium. With time, some of the U-238 radioactively decays into Pb−206 while the rest of it remains undisintegrated. When the age of the sample is P×108…2024 · Shift 2 · Q11 · Numerical
  4. Match the rate expressions in LIST-I for the decomposition of X with the corresponding profiles provided in LIST-II. Xs​ and k are constants having appropriate units. Includes table Includes diagram2022 · Shift 1 · Q15 · MCQ
  5. For the following reaction, 2X+Yk​P the rate of reaction is dtd[P]​=k[X]. Two moles of X are mixed with one mole of Y to make 1.0 L of solution. At 50 s, 0.5 mole of Y is left in the reaction mixture. The…2021 · Shift 2 · Q3 · Multiple correct
  6. 92238​U is known to undergo radioactive decay to form 82206​Pb by emitting alpha and beta particles. A rock initially contained 68 × 10 − 6 g of 92238​U. If the number of alpha particles that it would…2020 · Shift 1 · Q17 · Numerical
  7. Which of the following plots is(are) correct for the given reaction? ([P]0 is the initial concentration of P) Includes diagram2020 · Shift 2 · Q8 · Multiple correct
  8. Consider the kinetic data given in the following table for the reaction A + B + C → Product. The rate of the reaction for [A] = 0.15 mol dm-3, [B] = 0.25 mol dm-3 and [C] = 0.15 mol dm-3 is found to be Y × 10-5 mol dm-3s-1. The… Includes diagram2019 · Shift 1 · Q15 · Numerical
  9. In the decay sequence. x1, x2, x3 and x4 are particles/radiation emitted by the respective isotopes. The correct option(s) is(are) Includes diagram2019 · Shift 1 · Q7 · Multiple correct
  10. The decomposition reaction 2N2​O5​(g)Δ​2N2​O4​(g)+O2​(g) is started in a closed cylinder under isothermal isochoric condition at an initial pressure of 1 atm. After Y × 103 s, the pressure inside…2019 · Shift 2 · Q9 · Numerical
  11. For a first order reaction A(g)→2B(g)+C(g) at constant volume and 300K, the total pressure at the beginning (t=0) and at time t are P0​ and P1​, respectively. Initially, only A…2018 · Shift 2 · Q11 · Multiple correct
  12. Consider the following reversible reaction, A(g)+B(g)→AB(g). The activation energy of the backward reaction exceeds that of the forward reaction by 2RT(in Jmol−1). If the…2018 · Shift 2 · Q13 · Numerical
  13. In a bimolecular reaction, the steric factor P was experimentally determined to be 4.5. The correct option(s) among the following is (are)2017 · Shift 2 · Q11 · Multiple correct
  14. 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 > 20. For an unstable nucleus having N/P ratio less than 1, the possible mode(s) of…2016 · Shift 1 · Q1 · Multiple correct
  15. According to the Arrhenius equation,2016 · Shift 1 · Q2 · Multiple correct
  16. The % yield of ammonia as a function of time in the reaction N2​(g) + 3H2​(g) ⇌ 2NH3​(g), Δ H < 0 at (P, T1) is given below: If this reactions is conducted at (P, T2), with T2 > T1, the % yield of… Includes diagram2015 · Shift 1 · Q20 · Multiple correct
  17. In dilute aqueous H2​SO4​, the complex diaquodioxalatoferrate(II) is oxidized by MnO4−​. For this reaction, the ratio of the rate of change of [H+] to the rate of change of [MnO4−​] is2015 · Shift 2 · Q1 · Numerical
  18. A closed vessel with rigid walls contains 1 mol of 92238​U and 1 mol of air at 298 K. Considering complete decay of 92238​U to 82206​Pb, the ratio of the final pressure to the initial pressure of the system at…2015 · Shift 2 · Q2 · Numerical
  19. For the elementary reaction M → N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is2014 · Shift 2 · Q1 · MCQ
  20. X and Y are two volatile liquids with molar weights of 10 g mol − 1 and 40 g mol − 1, respectively. Two cotton plugs, one soaked in X and the other soaked in Y, are simultaneously placed at the ends of a tube of length L = 24 cm, as… Includes diagram2014 · Shift 2 · Q11 · MCQ
  21. X and Y are two volatile liquids with molar weights of 10 g mol − 1 and 40 g mol − 1, respectively. Two cotton plugs, one soaked in X and the other soaked in Y, are simultaneously placed at the ends of a tube of length L = 24 cm, as… Includes diagram2014 · Shift 2 · Q12 · MCQ
  22. In the reaction, P + Q → R + S, the time taken for 75% reaction of P is twice the time taken for 50% reaction of P. The concentration of Q varies with reaction time as shown in the figure. The overall order of the reaction is Includes diagram2013 · Shift 1 · Q12 · MCQ
  23. In the nuclear transmutation 9Be4​ + X → 8Be4​ + Y (X, Y) is (are) :2013 · Shift 2 · Q2 · Multiple correct
  24. 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 and t1/10 respectively. What is the value of [t1/10​t1/8​​]×10…2012 · Shift 1 · Q1 · Numerical
  25. The periodic table consists of 18 groups. An isotope of copper, on bombardment with protons undergoes a nuclear reaction yielding element X as shown below. To which group, element X belongs in the periodic table? 2963​Cu+11​H→601​n…2012 · Shift 1 · Q2 · Numerical
  26. Bombardment of aluminium by α-particle leads to its artificial disintegration in two ways : (i) and (ii) as shown. Products X, Y and Z, respectively, are Includes diagram2011 · Shift 1 · Q11 · MCQ
  27. For the first order reaction 2N2​O5​ (g) → 4NO2​ (g) + O2​ (g)2011 · Shift 2 · Q2 · Multiple correct
  28. The concentration of R in the reaction R → P was measured as a function of time and the following data is obtained The order of reaction is Includes table2010 · Shift 1 · Q12 · Numerical
  29. The number of neutrons emitted when 92235​U undergoes controlled nuclear fission to 54142​Xe and 3890​Sr is2010 · Shift 1 · Q13 · Numerical
  30. Plots showing the variation of the rate constant (k) with temperature (T) are given below. The point that follows Arrhenius equation is2010 · Shift 1 · Q17 · MCQ
  31. For a first-order reaction A → P, the temperature (T) dependent rate constant (k) was found to follow the equation logk=−(2000)T1​+6.0. The pre-exponential factor A and activation energy Ea​, respectively, are2009 · Shift 2 · Q1 · MCQ
  32. The total number of α and β particles emitted in the nuclear reaction 92238​U→82214​Pb is ​.2009 · Shift 2 · Q15 · Numerical
  33. Under the same reaction conditions, initial concentration of 1.386 mol dm −3 of a substance becomes half in 40 seconds and 20 seconds through first order and zero order kinetics, respectively. Ratio (k0​k1​​)…2008 · Shift 1 · Q6 · MCQ
  34. Consider a reaction aG + bH → Products. When concentration of both the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is…2007 · Shift 2 · Q3 · MCQ