Given below are two statements: Statement (I): The first io…

Chemistry Chemical Bonding and Molecular Structure JEE Main 2025 Single Correct MCQ

Published on: August 14, 2026

Given below are two statements:

Statement (I): The first ionization energy of Pb is greater than that of Sn .
Statement (II): The first ionization energy of Ge is greater than that of Si .
choose the correct answer from the options given below:

Statement I is false but Statement II is true

Statement I is true but Statement II is false

Both Statement I and Statement II are true

Both Statement I and Statement II are false

Text Solution

Verified by Experts

The correct answer is:

First ionization energy of Lead

First ionization energy of Tin
of Lead is greater than that of Tin due to ineffective shielding of d - and f -electrons.
Therefore Statement-I is true.
First ionization energy of Germanium
First ionization energy of Silicon
of Germanium is lower than that of Silicon as the effect of higher atomic radius of Ge outweighs the increase in nuclear charge from Si to Ge and effective shielding of inner electrons.
Therefore Statement-II is false.