JEE Main 202224 JuneMorning Shift

Exam: JEE Main
Year: 2022
Date: 24 June
Shift: Morning Shift
Subject: Chemistry
Chapter: p Block Elements (Group 15, 16, 17 & 18)

JEE Main 2022 · 24 June · Morning Shift · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Which one of the following elemental forms is not present in the...

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

Options

A ${Ca}^{2 +}$
B ${P}^{3 +}$
C ${F}^{-}$
D ${P}^{5 +}$

Correct answer

B. ${P}^{3 +}$

Step-by-step solution

Calcium phosphate is the major component of hydroxyapatite crystal that form the inorganic portion of the teeth

Calcium phosphate is a mineral comprising calcium ion (Ca²⁺) and phosphate ion ${P}^{+ 5}$ . It is present in the crown area of the tooth and also in bones. It contain some ${F}^{-}$ ions too. But it does not contain ${P}^{+ 3}$ ions.

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