JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumRecall

JEE Main 29 June 2022, Shift 1, Chemistry Q66

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

The electronic configuration of Pt (atomic number 78) is :

(1) $\mathrm{[Xe]\,4f^{14}\,5d^9\,6s^1}$ Official answer
(2) $\mathrm{[Kr]\,4f^{14}\,5d^{10}}$
(3) $\mathrm{[Xe]\,4f^{14}\,5d^{10}}$
(4) $\mathrm{[Xe]\,4f^{14}\,5d^8\,6s^2}$

Official answer

Option 1

NTA final key (2022 Session 1).

Chapter: The d- and f-Block Elements
Topic: d-Block Elements
Idea tested: Electronic Configuration

Same idea in other shifts

Asked 4× in all

9 Apr 2024, Shift 2 · Q66The electronic configuration of Einsteinium is : (Given atomic number of Einsteinium = 99)MediumSingle correct
8 Apr 2023, Shift 1 · Q80In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of Ti : 22, V : 23, Cr : 24, Mn : 25, Fe :…EasySingle correct
25 Feb 2021, Shift 1 · Q39In which of the following pairs, the outer most electronic configuration will be the same ?MediumSingle 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.