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Which of the following has the highest electron affinity?
Options
(a) F⁻
(b) O⁻
(c) O
(d) Na
Correct Answer:
O
Explanation:
As the size of atom decreases, a larger amount of energy is released when an elctrn is added to an isolated gaseous atom. Among the given species, the size of O atom is smallest (Since, size of parent atom is smaller as compared to its anion), thus its elctrn affinity is highest.
Related Questions: - CrO₃ dissolves in aqueous NaOH to give
- The electronic configuration of a noble gas is
- Na⁺, Mg²⁺, Al³⁺ and Si⁴⁺ are isoelectronic. The order of their ionic size is
- Equivalent weight of KMnO₄ in basic medium is (mol.wt. of KMnO₄ = 158)
- A helium, molecule is two times heavier than a hydrogen molecule at 298 K
Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Classification of Elements and Periodicity
(94)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- CrO₃ dissolves in aqueous NaOH to give
- The electronic configuration of a noble gas is
- Na⁺, Mg²⁺, Al³⁺ and Si⁴⁺ are isoelectronic. The order of their ionic size is
- Equivalent weight of KMnO₄ in basic medium is (mol.wt. of KMnO₄ = 158)
- A helium, molecule is two times heavier than a hydrogen molecule at 298 K
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Classification of Elements and Periodicity (94)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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