Learn

Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceAssertion–reasonMediumConceptual

JEE Main 30 January 2024, Shift 1, Chemistry Q65

Question 65 of 90 in this shift, Chemistry question 5 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) : There is a considerable increase in covalent radius from N to P. However from As to Bi only a small increase in covalent radius is observed. Reason (R) : Covalent and ionic radii in a particular oxidation state increases down the group. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. (2)Both (A) and (R) are true but (R) is not the correct explanation of (A)Official answer
  3. (3)(A) is true but (R) is false
  4. (4)(A) is false but (R) is true

Official answer

Option 2

NTA final key.

Chapter
Classification of Elements and Periodicity in Properties
Topic
Periodic Trends
Idea tested
Atomic and Ionic Radii Trends

Same idea in other shifts

Asked 6× in all
  1. 7 Apr 2025, Shift 2 · Q59Choose the incorrect trend in the atomic radii (r) of the elements.EasySingle correct
  2. 5 Apr 2024, Shift 2 · Q66Given below are two statements : Statement I : The metallic radius of Na is 1.86 A∘1.86\ \mathrm{A^\circ} and the ionic radius of…EasyTwo statements
  3. 31 Jan 2024, Shift 2 · Q66Consider the following elements. Group ↓\downarrow A' B' →\rightarrow Period C' D' Which of the following is/are true about A', B', C'…MediumOtherHas a figure
  4. 8 Jan 2020, Shift 2 · Q32The increasing order of the atomic radii of the following elements is : (a) C (b) O (c) F (d) Cl (e) BrEasySingle correct
  5. 2 Sep 2020, Shift 1 · Q32In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is :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.