Chemistry · Periodicity of Elements and Periodic Properties
JEE Main 2024 — 29 January, Shift 2 — Question 73
Given below are two statements, one is labelled as Statement I and the other is labelled as Statement II.
Statement I: Fluorine has most negative electron gain enthalpy in its group.
Statement II: Oxygen has least negative electron gain enthalpy in its group.
In the light of the above statements, choose the most appropriate from the options given below.
- Option A:
Both Statement I and Statement II are true
- Option B:
Statement I is true but Statement II is false
- Option C:
Both Statement I and Statement II are false
- Option D:Correct
Statement I is false but Statement II is true
Answer: D
Step-by-step solution
In group 17: Electron gain enthalpy is most negative for and not for due to greater electron–electron repulsion in . Hence, Statement I is false.
In group 16: Oxygen has less negative electron gain enthalpy compared to sulphur because of small size and higher inter-electronic repulsion. Thus oxygen has the least negative value in its group. Hence, Statement II is true.
Therefore, the correct option is D.
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2024
- Paper
- 29 January, Shift 2
- Subject
- Chemistry
- Chapter
- Periodicity of Elements and Periodic Properties
- Topic
- Periodicity in Chemical Properties (Ionization Energy, Electron Affinity, Electronegativity)