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JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 24 June 2022, Shift 1, Chemistry Q72

Question 72 of 90 in this shift, Chemistry question 12 of 30, Section A.

Which one of the following elemental forms is not present in the enamel of the teeth ?

(1) $\mathrm{Ca^{2+}}$
(2) $\mathrm{P^{3+}}$ Official answer
(3) $\mathrm{F^{-}}$
(4) $\mathrm{P^{5+}}$

Official answer

Option 2

NTA final key (2022 Session 1).

Chapter: Chemistry in Everyday Life
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy

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.