Chemistry · Periodicity of Elements and Periodic Properties

JEE Main 2026 — 2 April, Evening Shift — Question 55

Given below are two statements :

Statement-I : The second ionization enthalpy of $\mathrm{B}, \mathrm{Al}$ and Ga is in the order of $\mathrm{B}>\mathrm{Al}>\mathrm{Ga}$ .

Statement-II : The correct order in terms of first ionization enthalpy is $\mathrm{Si}<\mathrm{Ge}<\mathrm{Pb}<\mathrm{Sn}$ .

In the light of the above statements, choose the correct answer from the options given below:

Answer: B

Order of II ionization energy for boron family elements is :

\underset{(2427 \mathrm{KJ} / \mathrm{mol})}{\mathrm{B}}>{ }_{(1979 \mathrm{KJ} / \mathrm{mol})}^{\mathrm{Ga}}>\underset{(1816 \mathrm{KJ} / \mathrm{mol})}{\mathrm{Al}}

Order of I ionization energy for carbon family elements is :

\underset{(786 \mathrm{KJ} / \mathrm{mol})}{\mathrm{Si}}>\underset{(761 \mathrm{KJ} / \mathrm{mol})}{\mathrm{Ge}}>\underset{(715 \mathrm{KJ} / \mathrm{mol})}{\mathrm{Pb}}>\underset{(708 \mathrm{KJ} / \mathrm{mol})}{\mathrm{Sn}}

Answer key and solution verified before publishing.

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Exam: JEE Main 2026
Paper: 2 April, Evening Shift
Subject: Chemistry
Chapter: Periodicity of Elements and Periodic Properties
Topic: Periodicity in Chemical Properties (Ionization Energy, Electron Affinity, Electronegativity)