In which of the following molecule, the internuclear distance will be maximum:
1. CsI
2. CsF
3. LiF
4. LiI

Subtopic:  Atomic Size |
 64%
From NCERT
AIPMT - 1998
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Hints

The first ionization potential of Be and B will be:

1.  8.8 and 8.8
2.  6.6 and 6.6
3.  6.6 and 8.8
4.  8.8. and 6.6

Subtopic:  Ionization Energy (IE) |
 78%
From NCERT
AIPMT - 1998
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An electronic configuration that has maximum difference between II and III ionization potential is:

1. 1s2 2s2 2p6 3s1

2. 1s2 2s2 2p6 3s2

3. 1s2 2s2 2p6

4. 1s2 2s2 2p5

Subtopic:  Ionization Energy (IE) |
 67%
From NCERT
AIPMT - 1999
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The correct order of Ist IP(ionization potential) among the following elements Be, B, C, N, O is:

1. B < Be < C < O < N 2. B < Be < C < N < O
3. Be < B < C < N < O 4. Be < B < C < O < N
Subtopic:  Ionization Energy (IE) |
 81%
From NCERT
AIPMT - 2001
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Incorrect order among the following is:

1. NH3 < PH3 < AsH3 – Acidic

2. Li < Be < B < C – Ist Ionization potential

3. Al2O3 < MgO < Na2O < K2O - Basic

4. Li+ < Na+ < K+ < Cs+ - Ionic radius

Subtopic:  Ionization Energy (IE) | Atomic Size |
 75%
From NCERT
AIPMT - 2002
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If an atom has electronic configuration 1s22s22p63s23p63d34s2, we will place it in group number:

1. Fifth 2. Fifteenth
3. Second 4. Third
Subtopic:  Electronic Configuration |
 66%
From NCERT
AIPMT - 2002
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The ions O2–, F, Na+, Mg2+ , and Al3+ are isoelectronic. Their ionic radii show: 

1. A significant increase from O2– to Al3+.
2. A significant decrease from O2– to Al3+.
3. An increase from O2– to F and then a decrease from Na+ to Al3+.
4. A decrease from O2– to F and then an increase from Na+ to Al3+.

Subtopic:  Atomic Size |
 84%
From NCERT
AIPMT - 2003
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Ionic radii are:

1.  Inversely proportional to the square of effective nuclear charge.
2.  Directly proportional to the effective nuclear charge.
3.  Directly proportional to the square of effective nuclear charge.
4.  Inversely proportional to the effective nuclear charge.

Subtopic:  Atomic Size |
 71%
From NCERT
AIPMT - 2004
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Which one of the following oxides is expected to exhibit paramagnetic behaviour:

1. CO2

2. ClO2

3. SO2

4. SiO2

Subtopic:  Nature of Compound |
 56%
AIPMT - 2005
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Hints

Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species:

1.  F < Cl < O < S

2.  S < O < Cl < F

3.  O < S < F < Cl

4.  Cl < F < S < O

Subtopic:  Electron Affinity (EA) |
From NCERT
AIPMT - 2005
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