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Saturday, 31 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumConceptual

JEE Main 8 April 2023, Shift 1, Chemistry Q87

Question 87 of 90 in this shift, Chemistry question 27 of 30, Section B.

The number of given statement/s which is/are correct is ________ (A) The stronger the temperature dependence of the rate constant, the higher is the activation energy. (B) If a reaction has zero activation energy, its rate is independent of temperature. (C) The stronger the temperature dependence of the rate constant, the smaller is the activation energy. (D) If there is no correlation between the temperature and the rate constant then it means that the reaction has negative activation energy.

Official answer

2

NTA final key.

Chapter
Chemical Kinetics
Topic
Arrhenius Equation
Idea tested
Activation Energy Calculation

Same idea in other shifts

Asked 7× in all
  1. 6 Apr 2023, Shift 1 · Q87For the adsorption of hydrogen on platinum, the activation energy is 30 kJ mol−1^{-1} and for the adsorption of hydrogen on nickel, the…MediumNumerical value
  2. 24 Jun 2022, Shift 1 · Q85The rate constants for decomposition of acetaldehyde have been measured over the temperature range 700−1000700-1000 K. The data has been…EasyNumerical valueHas a figure
  3. 27 Jun 2022, Shift 1 · Q86The rate constant for a first order reaction is given by the following equation : ln⁡k=33.24−2.0×104 KT\ln k = 33.24 - \frac{2.0\times10^4\ \mathrm{K}}{T}…EasyNumerical value
  4. 27 Jun 2022, Shift 2 · Q88It 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…MediumNumerical value
  5. 29 Jun 2022, Shift 2 · Q85The equation k=(6.5×1012 s−1) e−26000 K/Tk = (6.5\times10^{12}\ \mathrm{s^{-1}})\,e^{-26000\,\mathrm{K}/T} is followed for the decomposition of compound A. The…EasyNumerical value
  6. 31 Aug 2021, Shift 2 · Q57For the reaction A → B, the rate constant k (in s−1\mathrm{s^{-1}}) is given by log⁡10k=20.35−(2.47×103)T\log_{10} k = 20.35 - \frac{(2.47 \times 10^3)}{T} The…EasyNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.