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The atomic numbers of vanadium (V), Chro...

The atomic numbers of vanadium (V), Chromium (Cr), maganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?

A

Cr

B

Mn

C

Fe

D

V

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The correct Answer is:
A
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The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent anion is called electron affinity or first electron affinity or electron gain enthalpy. The first electron is given a negative sign as the addition of an electron to a neutral atom is an exoergic process. The addition of electron to A^(-1) requires energy to overcome the force of repulsion. Thus, the second electron affinity is an endoergic process. The magnitude of electron affinity depends on a number of factors such as (i) atomic size (ii) effective nuclear charge (iii) screening effect (iv) half and fully filled orbitals and (v) shape of orbital. In general, electron affinity increases as the atomic radii decrease in a period. However, there are exceptions when the atoms have stable configurations. In a group, electron affinity decreases as the size increases. However, the members of 3rd period have somewhat higher values than the members in the 2nd period of the same subgroups. Which of the following species has the highest electron affinity?

The correct order of decreasing second ionization enthalpy of Ti(22), V(23), Cr (24) and Mn(25) is

The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent anion is called electron affinity or first electron affinity or electron gain enthalpy. The first electron is given a negative sign as the addition of an electron to a neutral atom is an exoergic process. The addition of electron to A^(-1) requires energy to overcome the force of repulsion. Thus, the second electron affinity is an endoergic process. The magnitude of electron affinity depends on a number of factors such as (i) atomic size (ii) effective nuclear charge (iii) screening effect (iv) half and fully filled orbitals and (v) shape of orbital. In general, electron affinity increases as the atomic radii decrease in a period. However, there are exceptions when the atoms have stable configurations. In a group, electron affinity decreases as the size increases. However, the members of 3rd period have somewhat higher values than the members in the 2nd period of the same subgroups. Which of the following processes is endoergic in nature ?

The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent anion is called electron affinity or first electron affinity or electron gain enthalpy. The first electron is given a negative sign as the addition of an electron to a neutral atom is an exoergic process. The addition of electron to A^(-1) requires energy to overcome the force of repulsion. Thus, the second electron affinity is an endoergic process. The magnitude of electron affinity depends on a number of factors such as (i) atomic size (ii) effective nuclear charge (iii) screening effect (iv) half and fully filled orbitals and (v) shape of orbital. In general, electron affinity increases as the atomic radii decrease in a period. However, there are exceptions when the atoms have stable configurations. In a group, electron affinity decreases as the size increases. However, the members of 3rd period have somewhat higher values than the members in the 2nd period of the same subgroups. Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species ?

AAKASH SERIES-PERIODIC CLASSIFICATION-OBJECTIVE EXERCISE - 1 (IONISATION POTENTIAL)
  1. The first ionisation potential is maximum for

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  2. Second ioniation energy is higher than first ionisation energy for an ...

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  3. Atoms of the following group possess the highest ionisaiton energies

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  4. Atoms of the following group possess the lowest ionisation energies

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  5. Configuration of the element with the highest ionisation energy is

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  6. When Lithium vapour is taken in a discharge tube and the potential dif...

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  7. Which of the following transition involves maximum amount of energy?

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  8. The first ionisation potential is maximum for

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  9. The lowest first ionization energy would be associated with which of t...

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  10. The maximum tendency to form tripositive ion is for the element with t...

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  11. As one moves along a given row in the periodic table, ionisation energ...

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  12. First four ionisation energy values of an element are 191, 578, 872 an...

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  13. Ionisation potential values of Li, Be and B are respectively in kJ "mo...

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  14. Elements X, Y and Z have atomic numbers 19, 37 and 55 respectively. Wh...

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  15. Which of the following process refers to ionisation potential ?

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  16. The atomic numbers of vanadium (V), Chromium (Cr), maganese (Mn) and i...

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  17. Which of the following ionization energy values for Calcium show a sud...

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  18. When the screening effect increases, ionisation energy

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  19. With an increase in the extent of penetration of valence electrons, io...

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  20. The group of elements with highest second ionisation energy is

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