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Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 29 July 2022, Shift 1, Chemistry Q87

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

The reaction between X and Y is first order with respect to X and zero order with respect to Y. Experiment | [X] mol L−1\mathrm{mol\ L^{-1}} | [Y] mol L−1\mathrm{mol\ L^{-1}} | Initial rate mol L−1 min−1\mathrm{mol\ L^{-1}\ min^{-1}} I | 0.1 | 0.1 | 2×10−32\times10^{-3} II | L | 0.2 | 4×10−34\times10^{-3} III | 0.4 | 0.4 | M×10−3\mathrm{M}\times10^{-3} IV | 0.1 | 0.2 | 2×10−32\times10^{-3} Examine the data of table and calculate ratio of numerical values of M and L. (Nearest Integer)

The figure, in words

Table of experiments I-IV with columns [X], [Y] and initial rate; L and M are unknowns.

Official answer

40

NTA final key.

Chapter
Chemical Kinetics
Topic
Rate Laws
Idea tested
Initial Rates Method

Same idea in other shifts

Asked 9× in all
  1. 5 Apr 2024, Shift 1 · Q85During Kinetic study of reaction 2A+B→C+D2\mathrm{A} + \mathrm{B} \rightarrow \mathrm{C} + \mathrm{D}, the following results were obtained : A…MediumNumerical valueHas a figure
  2. 27 Jan 2024, Shift 1 · Q87Consider the following data for the given reaction 2 HI(g)→H2(g)+I2(g)\mathrm{2\ HI_{(g)} \rightarrow H_{2(g)} + I_{2(g)}} | 1 | 2 | 3…EasyNumerical value
  3. 11 Apr 2023, Shift 2 · Q63For a chemical reaction A + B →\to Product, the order is 1 with respect to A and B. | Rate mol L−1 S−1\mathrm{mol\ L^{-1}\ S^{-1}} | [A]…MediumSingle correctHas a figure
  4. 27 Jul 2022, Shift 1 · Q822NO+2H2→N2+2H2O\mathrm{2NO + 2H_2 \rightarrow N_2 + 2H_2O} The above reaction has been studied at 800∘800^\circC. The related data are given in the table…EasyNumerical value
  5. 3 Aug 2021, Shift 1 · Q57The following results have been obtained during the kinetic studies of the reaction. A + 2B ⟶ 2C Experiment | [A], mol L−1\mathrm{L^{-1}} |…EasyNumerical valueHas a figure
  6. 26 Aug 2021, Shift 1 · Q56The following data was obtained for chemical reaction given below at 975 K.…EasyNumerical value
  7. 18 Mar 2021, Shift 1 · Q572 NO(g)+Cl2(g)⇌2 NOCl(s)\mathrm{2\,NO(g) + Cl_2(g) \rightleftharpoons 2\,NOCl(s)} This reaction was studied at −10-10°C and the following data was obtained run |…MediumNumerical value
  8. 2 Sep 2020, Shift 2 · Q26The results given in the below table were obtained during kinetic studies of the following reaction :…MediumSingle correctHas a figure

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.