Periodic Classification Quiz No:4 -

Periodic Classification Quiz No:4

Question No:1

Correct statement among the following is

[A] Covalent radius is 40% more than Van der waals radius

[B] Van der waals radius is less than covalent radius

[C] Van der waal’s radius is 40% more than covalent radius

[D] Radii cannot be compared

Question No:2

Very slight decrease in atomic radius occurs in a transition series when compared with that in a representative series. This is due to

[A] Shielding effect

[B] Penetrating effect

[C] Compton effect

[D] Inert pair effect

Question No:3

Separation of Lanthanides from their mixture is not easy because of

[A] Shielding effect

[B] Penetrating effect

[C] Consequences of lanthanide contraction

[D] Inert pair effect

Question No:4

If the radius of Fe++ is 0.76A0; the radius of Fe+++ is

[A] 0.64A0

[B] 0.76A0

[C] 0.88A0

[D] 1.08A0

Question No:5

Among elements with the following electronic configurations, the one with the largest radius is

[A] 1s2 2s2 2p6 3s2

[B] 1s2 2s2 2p6 3s2 3p

[C] 1s2 2s2 2p6 3s2 3p3

[D] 1s2 2s2 2p6 3s2 3p5

Question No:6

Largest ion among the following is

[A] Na+

[B] Cr2

[C] S-2

[D] Cl

Question No:7

Which of the following has the largest atomic radius ?

[A] Al

[B] Si

[C] Cl

[D] Na

Question No:8

Which of the following order is correct for the size of Fe3+, Fe and Fe2+?

[A] Fe < Fe2+< Fe3+

[B] Fe2+< Fe3+< Fe [C] Fe < Fe3+< Fe2+

[D] Fe3+< Fe2+< Fe

Question No:9

Metallic radius of Ca is 200pm. Covalent radius of Ca is

[A] 200pm

[B] 230pm

[C] 280pm

[D] 174pm

Question No:10

Similarity in the radius of Zr and Hf is explained on the basis of

[A] Lanthanide contraction

[B] Inert pair effect

[C] Same outer shell configuration

[D] Anomalous configuration

Question No:11

Which one is the correct order of the size of the iodine species?

[A] I > I+ > I

[B] I>I>I+

[C] I+ > I > I

[D] I >I > I+

Question No:12

The correct sequence which shows decreasing order of the ionic radii of the elements is

[A] Na+ > Mg2+ > Al3+ > O2- > F

[B] Na+ > F > Mg2+ > O2- > A13+

[C] O2- > F > Na+ > Mg2+ > Al3+

[D] Al3+ > Mg2+ > Na+ > F > O2-

Question No:13

The Lanthanide contraction relates to

[A] Oxidaion states

[B] Magnetic state

[C] Atomic radii

[D] Valence electrons

Question No:14

Which of the following process refers to ionisation potential?

[A] X(s) —> X+(g) + e

[B] X(g)+aq—>X+(aq)e

[C] X(g) — > X+(g) + e

[D] X(g) + e —> X(g)

Question No:15

When the screening effect increases, ionisation energy

[A] Decreases

[B] Increases

[C] First increases and then decreases

[D] Remains constant

Question No:16

With an increase in the extent of penetration of valence electrons, ionisation energy

[A] Decreases

[B] Increases

[C] Remains constant

[D] Both are not related

Question No:17

The group of elements with highest second ionisation energy is

[A] IIA group

[B] Zero group

[C] VIIA group

[D] IA group

Question No:18

How many ionisation energies can carbon have? Electronic configuration of carbon
in Ground state :1s2 2s2 2px1 2py1
in Excited state : 1s2 2s1 2px1 2py1 2pz1.

[A] 1

[B] 2

[C] 4

[D] 6

Question No:19

First ionisation potential of magnesium is greater than that of aluminium because

[A] Aluminium atom is very large when compared to Mg

[B] Aluminium has a stable electronic configuration

[C] Magnesium has a stable electronic configuration

[D] The electron affinity of Magnesium is positive (energy is absorbed)

Question No:20

Electrons with the highest penetrating power are

[A] p-electrons

[B] s-electrons

[C] d-electrons

[D] f-electrons