Chemistry · 2024
JEE Main · 29 January 2024, Shift 1 · Q64
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The first ionisation enthalpy…
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :Assertion A : The first ionisation enthalpy decreases across a period.
Reason R : The increasing nuclear charge outweighs the shielding across the period.In the light of the above statements, choose the most appropriate from the options given below :
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle \mathbf{A}$ is false but $\displaystyle \mathbf{R}$ is true
All Classification of Elements and Periodicity questionsPractice Classification of Elements and Periodicity →
More from Classification of Elements and Periodicity
- The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is:2026
- The electron affinity value are negative for A. Be → Be^- B. N → N^- C. O → O^2- D. Na → Na^- E. Al → Al^- Choose the most appropriate answer from…2024
- Electronic configuration of four elements A, B, C and D are given below: 1 s^2 2 s^2 2 p^3 1 s^2 2 s^2 2 p^4 1 s^2 2 s^2 2 p^5 1 s^2 2 s^2 2 p^2…2025
- The type of oxide formed by the element among Li, Na, Be, Mg, B and Al that has the least atomic radius is:2025
- Given below are two statements: Statement (I): The oxidation state of an element in a particular compound is the charge acquired by its atom on the…2024
- Given below are two statements: Statement (I): The 4 f and 5 f - series of elements are placed separately in the Periodic table to preserve the…2024
- In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme right element,…2026
- First and second ionization enthalpies of lithium are 520 kJ mol^-1 and 7297 kJ mol^-1 respectively. Energy required to convert 3.5 mg lithium (g)…2026
JEE Main 2024 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.