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Friday, 9 October

JEE Main 2024 · ChemistryMultiple choiceAssertion–reasonEasyConceptual

JEE Main 8 April 2024, Shift 1, Chemistry Q66

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

Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and Tl is Ga < In < Tl. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below:
  1. (1)Both A and R are true and R is the correct explanation of A.Official answer
  2. (2)Both A and R are true but R is NOT the correct explanation of A.
  3. (3)A is true but R is false.
  4. (4)A is false but R is true.

Official answer

Option 1

NTA final key.

Chapter
The p-Block Elements
Topic
Group 13 & 14
Idea tested
Inert Pair Effect

Same idea in other shifts

Asked 5× in all
  1. 4 Apr 2026, Shift 2 · Q58The electronegativity of a group 13 element 'E' is same as that of Ge (on Pauling scale and upto one decimal point). The CORRECT…HardOther
  2. 7 Apr 2025, Shift 1 · Q60The group 14 elements A and B have the first ionisation enthalpy values of 708 and 715 kJ mol−1\mathrm{mol^{-1}} respectively. The above…MediumSingle correct
  3. 7 Apr 2025, Shift 2 · Q60The correct statements from the following are : (A) Tl3+\mathrm{Tl^{3+}} is a powerful oxidising agent (B) Al3+\mathrm{Al^{3+}} does not get…MediumOther
  4. 6 Apr 2024, Shift 2 · Q67The number of ions from the following that are expected to behave as oxidising agent is :…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 42 of the 174 JEE Main shifts held from 2017 to 2026.