JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 2 September 2020, Shift 1, Chemistry Q34

Question 34 of 75 in this shift, Chemistry question 9 of 25.

The metal mainly used in devising photoelectric cells is :

(1)Li
(2)Na
(3)Rb
(4)CsOfficial answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter: The s-Block Elements
Topic: s-Block Elements
Idea tested: Photoelectric Application of K and Cs

Same idea in other shifts

Asked 2× in all

25 Feb 2021, Shift 2 · Q58Among the following, number of metal/s which can be used as electrodes in the photoelectric cell is ________. (Integer answer) (A) Li (B)…EasyNumerical value

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.