Periodic Classification Quiz No:5 -

Periodic Classification Quiz No:5

Question No:1

The element that possess the lowest ionisation energy among the following

[A] Oxygen

[B] Fluorine

[C] Sulphur

[D] Nitrogen

Question No:2

Atoms of the following group possess the highest ionisation energies

[A] IA


[C] VA

[D] Zero

Question No:3

Atoms of the following group possess the lowest ionisation energies

[A] IA


[C] VA

[D] Zero

Question No:4

Configuration of the element with the highest ionisation energy is

[A] Ne3s1

[B] Ne 3s2 3p3

[C] Ne 3d10 4s2 4p3

[D] Ne 3s2 3p4

Question No:5

When Lithium vapour is taken in a discharge tube and the potential difference between the electrodes is 5.4 ev, there is a sudden increase in the flow of current. The ionisation energy of Lithium is

[A] 54ev

[B] 520kJmol1

[C] 54 kJ atom1

[D] 5.4 ev atom1

Question No:6

Which of the following transition involves maximum amount of energy?

[A] M(g) -> M(g)

[B] M(g) —> M+(g)

[C] M+(g) –> M2+(g)

[D] M+2(g) — > M3+(g)

Question No:7

The first ionisation potential is maximum for

[A] Lithium

[B] Uranium

[C] Iron

[D] Hydrogen

Question No:8

The Iowest first ionization energy would be associated with which of the following configurations.

[A] 1s2 2s2 2P6 3s1

[B] 1s22s22p5

[C] 1s22s22p6

[D] 1s22s22p63s23p2

Question No:9

The maximum tendency to form unipositive ion is for the element with the electronic configuration

[A] 1s22s22p63s2

[B] 1s22s22p63s23p1

[C] 1s22s22p63s23p2

[D] 1s22s22p63s23p3

Question No:10

As one moves along a given row in the periodic table, ionisation energy

[A] Remains same

[B] Increasing from left to right

[C] First increases and then decreases

[D] decreases from left to right

Question No:11

First four ionisation energy values of an element are 191, 578, 872 and 5972 K.Cals The number of valence electrons in the element is

[A] 4

[B] 3

[C] 1

[D] 2

Question No:12

Ionisation potential values of Li, Be and B are respectively in kJ mol1

[A] 801,899,520

[B] 520,801,899

[C] 899,801,520

[D] 520,899,801

Question No:13

Screening effect is not common for the elements of the period

[A] 7

[B] 3

[C] 1

[D] 4

Question No:14

Electron affinity is

[A] Energy required to take out an electron from an isolated gaseous atom

[B] The tendency of an atom to attract an electron towards itself

[C] Energy absorbed when an electron is added to an isolated atom in gaseous state

[D] Energy released when an electron is added to an isolated atom in the gaseous state

Question No:15

The property of an element that cannot be determined directly but can be obtained indirectly from Born-Haber cycle is

[A] Ionisation potential

[B] Electron affinity

[C] Electronegativity

[D] Electropositive character

Question No:16

Electron affinity is measured in

[A] No units

[B] kcalmol1

[C] kJ mol1

[D] Both (2) and (3)

Question No:17

Which of the following is an endothermic process?

[A] First electron affinity of chlorine

[B] Second electron affinity of oxygen

[C] Formation of NaC from gaseous ions

[D] Hydration of MgC2

Question No:18

In a period from left to right, electron affinity

[A] Increases

[B] Decreases

[C] Remains constant

[D] First increases and then decreases

Question No:19

Configuration that shows the highest energy released when an electron is added to the atom is

[A] I)1s22s22p3

[B] 1s22s22p4

[C] 1s2 2s2 2p5

[D] 1s2 2s2 2p6

Question No:20

Electron affinity of Fluorine is less than that of Chlorine because

[A] Electronegativity of Fluorine is more

[B] 2p sub shell of F is smaller

[C] Chlorine is a stronger oxidant

[D] Bond dissociation energy of F2 is less