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Which of the following orders of ionic radii is correctly represented
Options
(a) H⁻ > H⁺ > H
(b) Na⁺ > F⁻ > O²⁻
(c) F⁻ > O²⁻ > Na⁺
(d) Al³⁺ > Mg²⁺ > N³⁻
Correct Answer:
none
Explanation:
Cations lose electrons and are smaller in size than the parent atom whereas anions add electrons and are larger in size than the parent atom. Hence the order is H⁻ >H>H⁺.
For isoelectronic species the ionic radii decreases with increase in atomic number i.e nuclear charge.
Hence the correct orders are O²⁻>F⁻>Na⁺ and N³⁻>Mg²⁺>Al³⁺
Related Questions: - The values of heat of formation of SO₂ and SO₃ are -298.2 kJ and -98.2 kJ.
- One of the following metals is obtained by leaching its ore with
- Gem-dihalides are hydrolysed with either acid or basic catalysts to give
- If a gas expands at constant temperature , it indicates that
- Cobalt(III) chloride forms several octahedral complexes with ammonia.
Topics: Classification of Elements and Periodicity
(94)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The values of heat of formation of SO₂ and SO₃ are -298.2 kJ and -98.2 kJ.
- One of the following metals is obtained by leaching its ore with
- Gem-dihalides are hydrolysed with either acid or basic catalysts to give
- If a gas expands at constant temperature , it indicates that
- Cobalt(III) chloride forms several octahedral complexes with ammonia.
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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