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Saturday, 31 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 6 April 2023, Shift 2, Chemistry Q85

Question 85 of 90 in this shift, Chemistry question 25 of 30, Section B.

The equilibrium composition for the reaction PCl3+Cl2⇌PCl5\mathrm{PCl_3 + Cl_2 \rightleftharpoons PCl_5} at 298 K is given below: [PCl3]eq[\mathrm{PCl_3}]_{eq} = 0.2 mol L−1^{-1}, [Cl2]eq[\mathrm{Cl_2}]_{eq} = 0.1 mol L−1^{-1}, [PCl5]eq[\mathrm{PCl_5}]_{eq} = 0.40 mol L−1^{-1} If 0.2 mol of Cl2\mathrm{Cl_2} is added at the same temperature, the equilibrium concentrations of PCl5\mathrm{PCl_5} is ______________ ×10−2\times 10^{-2} mol L−1^{-1} Given: KcK_c for the reaction at 298 K is 20

Official answer

49

NTA final key.

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

Same idea in other shifts

Asked 2× in all
  1. 5 Sep 2020, Shift 1 · Q43Consider 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…MediumOther

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.