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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceOtherMediumApplication

JEE Main 5 September 2020, Shift 1, Chemistry Q43

Question 43 of 75 in this shift, Chemistry question 18 of 25.

Consider the following reaction : N2O4(g)⇌2NO2(g)\mathrm{N_2O_4(g) \rightleftharpoons 2NO_2(g)} ; ΔH0=+58\Delta \mathrm{H}^{0} = +58 kJ For each of the following cases (a, b), the direction in which the equilibrium shifts is : (a) Temperature is decreased. (b) Pressure is increased by adding N2\mathrm{N_2} at constant T.
  1. (1)(a) towards product, (b) towards reactant
  2. (2)(a) towards reactant, (b) towards product
  3. (3)(a) towards reactant, (b) no changeOfficial answer
  4. (4)(a) towards product, (b) no change

Official answer

Option 3

NTA final key (Sep 2020).

Chapter
Equilibrium
Topic
Chemical Equilibrium
Idea tested
Le Chatelier's Principle

Same idea in other shifts

Asked 2× in all
  1. 6 Apr 2023, Shift 2 · Q85The equilibrium composition for the reaction PCl3+Cl2⇌PCl5\mathrm{PCl_3 + Cl_2 \rightleftharpoons PCl_5} at 298 K is given below:…MediumNumerical 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.