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Q. No.
Assertion (A) The helium atom has the highest ionization energy among all the elements.
Reason (R): Helium is the smallest atom among all the elements.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Ionization Energy (IE) |
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Which is the correct order of ionization energies?

1. F- > F > Cl- > Cl

2. F > Cl > Cl- > F-

3. F- > Cl- > Cl > F

4. F- > Cl- > F > Cl

Subtopic:  Ionization Energy (IE) |
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The element having very high electron affinity but zero ionisation enthalpy is:

1. He (due to inert gas configuration)

2. Be (due to fully filled subshell)

3. H (due to presence of allotropes)

4. None of the above

Subtopic:  Ionization Energy (IE) |
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The correct order of ionization energies for the elements Si, P, Ge, and As, from lowest to highest, is:

1. Si < P < Ge < As 2. As < Ge < P < Si
3. Ge < Si < As < P 4. Ge < As < Si < P
Subtopic:  Ionization Energy (IE) |
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1st (∆H1) and 2nd  (∆H2) Ionization Enthalpies (in kJ mol–1) and the (∆egH) Electron Gain Enthalpy (in kJ mol–1) of a few elements are given below:

Elements ΔH1 ΔH2 ΔegH
I 520 7300 –60
II 419 3051 –48
III 1681 3374 –328
IV 1008 1846 –295
V 2372 5251 +48
VI 738 1451 –40

The most reactive metal is:

1. VI 2. III
3. I 4. II
Subtopic:  Ionization Energy (IE) |
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Element which has the lowest ionisation potential among the following is:

1. C 2. Si
3. Sn 4. Pb
Subtopic:  Ionization Energy (IE) |
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The atomic species that has the maximum ionization energy is : 

1. O- 2. S-
3. Se- 4. Te-
Subtopic:  Ionization Energy (IE) |
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Which of the following, ions has the highest ionisation potential?
 
1. F-
2. Cl- 
3. Br-
4. I-
Subtopic:  Ionization Energy (IE) |
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