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Saturday, 31 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueEasyConceptual

JEE Main 10 April 2023, Shift 2, Chemistry Q83

Question 83 of 90 in this shift, Chemistry question 23 of 30, Section B.

The number of endothermic process/es from the following is ____________ A. I2\mathrm{I_2} (g) →\rightarrow 2I (g) B. HCl (g) →\rightarrow H(g) + Cl(g) C. H2O\mathrm{H_2O}(l) →\rightarrow H2O\mathrm{H_2O}(g) D. C(s) + O2\mathrm{O_2} (g) →\rightarrow CO2\mathrm{CO_2} (g) E. Dissolution of ammonium chloride in water

Official answer

4

NTA final key.

Chapter
Thermodynamics (Chemistry)
Topic
Enthalpy and Hess's Law
Idea tested
Sign Conventions for Heat Flow

Same idea in other shifts

Asked 2× in all
  1. 25 Jul 2021, Shift 2 · Q54A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of the change in internal energy is ________ J.…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.