Learn

Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceAssertion–reasonEasyConceptual

JEE Main 1 February 2024, Shift 1, 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) : PH3\mathrm{PH_3} has lower boiling point than NH3\mathrm{NH_3}. Reason (R) : In liquid state NH3\mathrm{NH_3} molecules are associated through vander Waal's forces, but PH3\mathrm{PH_3} molecules are associated through hydrogen bonding. 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 (A)
  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 correctOfficial answer
  4. (4)(A) is not correct but (R) is correct

Official answer

Option 3

NTA final key.

Chapter
Chemical Bonding and Molecular Structure
Topic
Periodic Trends
Idea tested
Boiling Point Anomalies of p-Block Hydrides

Same idea in other shifts

Asked 2× in all
  1. 3 Sep 2020, Shift 1 · Q33If the boiling point of H2O\mathrm{H_2O} is 373 K, the boiling point of H2S\mathrm{H_2S} will be :EasySingle correct

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.