Chemistry · Periodicity of Elements and Periodic Properties

JEE Main 2024 — 1 February, Shift 2 — Question 64

Given below are two statements, one is labelled as Statement I and the other is labelled as Statement II.

Statement (I) : Both metal and non-metal exist in $p$ -and $d$ -block elements.

Statement (II) : Non-metals have higher ionisation enthalpy and higher electronegativity than the metals.

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

Option A:
Both Statement I and Statement II are false
Option B:
Statement I is false but Statement II is true
Correct
Option C:
Statement I is true but Statement II is false
Option D:
Both Statement I and Statement II are true

Answer: B

Step-by-step solution

Statement I is false: Both metals and non-metals are found in the $p$ -block, but the $d$ -block contains only metals. Therefore, it is incorrect to say that both metals and non-metals exist in both $p$ - and $d$ -block elements.

Statement II is true: In general, non-metals have higher ionisation enthalpy and higher electronegativity than metals due to their smaller atomic size and greater tendency to attract electrons.

Thus, statement I is false but statement II is true (Option B).

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 1 February, Shift 2
Subject: Chemistry
Chapter: Periodicity of Elements and Periodic Properties
Topic: Periodicity in Chemical Properties (Ionization Energy, Electron Affinity, Electronegativity)