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Q. No.

Ionic radii vary with respect to the following factors:

a. Inversely proportional to the effective nuclear charge.
b. Directly proportional to the effective nuclear charge.
c. Directly proportional to the screening effect.
d. Inversely proportional to the screening effect.

Which of the following pairs of statements is/are correct?
1. a and c
2. c and d
3. a and b
4. b and d

Subtopic:  Atomic Size | Screening Effect |
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Level 1: 80%+
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Which of the following statements accurately describes the relationship of the ionic radius?

1. It is inversely proportional to the effective nuclear charge.
2. It is inversely proportional to the square of the effective nuclear charge.
3. It is directly proportional to the screening effect.
4. It is directly proportional to the square of the screening effect.
Subtopic:  Atomic Size | Screening Effect |
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What is the correct order of polarizing power?

1. Be+2 >Mg+2 >Ca+2 >K+
2. Be+2 >Ca+2 >Mg+2>K+
3. Mg+2 >Ca+2 >Be+2>K+
4. Mg+2>Be+2 >Ca+2>K+
Subtopic:  Atomic Size |
 81%
Level 1: 80%+
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The correct order of radii is:

1. N < Be < B
2.  \(\mathrm{F}^{-}<\mathrm{O}^{2-}<\mathrm{N}^{3-} \)
3. Na < Li < K  
4. \(\mathrm{Fe}^{3+}<\mathrm{Fe}^{2+}<\mathrm{Fe}^{4+} \)
Subtopic:  Atomic Size |
 91%
Level 1: 80%+
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Which statement accurately describes the relationship between the sizes of atoms and their ions?
1. Cations are smaller than their atoms, and anions are larger.
2. Cations and anions are both smaller than their atoms.
3. Cations and anions are both larger than their atoms.
4. Cations are larger than their atoms, and anions are smaller.
Subtopic:  Atomic Size |
 92%
Level 1: 80%+
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What is the correct increasing order of ionic radii for the following ions?

1. \(\mathrm{Mg}^{2+}<\mathrm{Na}^{+}<\mathrm{F}^{-}<\mathrm{O}^{2-}<\mathrm{N}^{3-}\)
2. \(\mathrm{N^{3–} < O^{2–} < F^– < Na^+ < Mg^{2+}}\)
3. \(\mathrm{F^– < Na^+ < O^{2–} < Mg^{2+} < N^{3–}}\)
4. \(\mathrm{Na^+ < F^–< Mg^{2+} < O^{2–} < N^{3–}}\)
Subtopic:  Atomic Size |
 90%
Level 1: 80%+
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The ionic radii (in Å) of the isoelectronic species \(\mathrm{N^{3-}}, \mathrm{O^{2-}}, and~ \mathrm{F^-}\) are respectively:

1. 1.36, 1.40 and 1.71

2. 1.36, 1.71 and 1.40

3. 1.71, 1.40 and 1.36

4. 1.71, 1.36 and 1.40

Subtopic:  Atomic Size |
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Level 1: 80%+
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Which of the following is smallest in size?

1. Na+

2. F–

3. O2–

4. N3–

Subtopic:  Atomic Size |
 88%
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The increasing order of the ionic radii of the given isoelectronic species is :

1. S2−,Cl−,Ca2+,K+

2. Ca2+,K+,Cl−,S2−

3. K+,S2−,Ca2+,Cl−

4. Cl−,Ca2+,K+,S2−

Subtopic:  Atomic Size |
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Find the correct increasing order of ionic radii for the following isoelectronic species:

N³⁻, O²⁻, F⁻, Na⁺, Mg²⁺ and Al³⁺

1. Al³⁺ < Na⁺ < Mg²⁺ < O²⁻ < F⁻ < N³⁻
2. N³⁻ < O²⁻ < F⁻ < Na⁺ < Mg²⁺ < Al³⁺
3. Al³⁺ < Mg²⁺ < Na⁺ < F⁻ < O²⁻ < N³⁻
4. N³⁻ < F⁻ < O²⁻ < Mg²⁺ < Na⁺ < Al³⁺
Subtopic:  Atomic Size |
 89%
Level 1: 80%+
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