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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceAssertion–reasonMediumConceptual

JEE Main 13 April 2023, Shift 2, Chemistry Q66

Question 66 of 90 in this shift, Chemistry question 6 of 30, Section A.

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Isotopes of hydrogen have almost same chemical properties, but difference in their rates of reaction. Reason R : Isotopes of hydrogen have different enthalpy of bond dissociation. In the light of the above statements, choose the most appropriate answer from the options given below:
  1. (1)Both A and R are correct and R is the correct explanation of AOfficial answer
  2. (2)Both A and R are correct but R is NOT the correct explanation of A
  3. (3)A is correct but R is not correct
  4. (4)A is not correct but R is correct

Official answer

Option 1

NTA final key.

Chapter
Hydrogen
Topic
Hydrogen and Hydrides
Idea tested
Kinetic Isotope Effect in Hydrogen

Same idea in other shifts

Asked 2× in all
  1. 26 Aug 2021, Shift 2 · Q36Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Heavy water is…MediumAssertion–reason

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.