JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 6 April 2023, Shift 1, Chemistry Q87

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

For the adsorption of hydrogen on platinum, the activation energy is 30 kJ mol

^{-1}

and for the adsorption of hydrogen on nickel, the activation energy is 41.4 kJ mol

^{-1}

. The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at 300 K is ________ (Nearest integer) Given: ln 10 = 2.3

R = 8.3

J K

^{-1}

mol

^{-1}

Official answer

NTA final key.

Chapter: Surface Chemistry
Topic: Arrhenius Equation
Idea tested: Activation Energy Calculation

Same idea in other shifts

Asked 7× in all

8 Apr 2023, Shift 1 · Q87The number of given statement/s which is/are correct is ________ (A) The stronger the temperature dependence of the rate constant, the…MediumNumerical value
24 Jun 2022, Shift 1 · Q85The rate constants for decomposition of acetaldehyde have been measured over the temperature range $700-1000$ K. The data has been…EasyNumerical valueHas a figure
27 Jun 2022, Shift 1 · Q86The rate constant for a first order reaction is given by the following equation : $\ln k = 33.24 - \frac{2.0\times10^4\ \mathrm{K}}{T}$ …EasyNumerical value
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
29 Jun 2022, Shift 2 · Q85The equation $k = (6.5\times10^{12}\ \mathrm{s^{-1}})\,e^{-26000\,\mathrm{K}/T}$ is followed for the decomposition of compound A. The…EasyNumerical value
31 Aug 2021, Shift 2 · Q57For the reaction A → B, the rate constant k (in $\mathrm{s^{-1}}$ ) is given by $\log_{10} k = 20.35 - \frac{(2.47 \times 10^3)}{T}$ 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.