Periodic Classification Quiz No:3

Question No:1

Which is not a transition metal?

[A] Ag

[B] Pb

[C] Cr

[D] Pt

Question No:2

The general electronic configuration (n-1)d3ns2 indicates that the particular element belong to the group

[A] VB

[B] VA

[C] IVB

[D] IIB

Question No:3

The electronic configuration of chromium in its ground state is

[A] [Ar]4d44s2

[B] [Ar] 4d5 4s1

[C] [Ar] 3d43s2

[D] [Ar] 3d5 4s1

Question No:4

Which of the following pairs of ions have the same electronic configuration

[A] Cr+3,Fe+3

[B] Fe+3, Mn+2

[C] Fe+3, Co+3

[D] Sc+3, Cr+3

Question No:5

The electronic configuration 1s2 2s2 2p6 3s2 3p4 represents

[A] Oxygen

[B] Magnesium

[C] Calcium

[D] Sulphur

Question No:6

What is wrong about transition metals?

[A] They are diamagnetic

[B] They are paramagnetic

[C] They form complexes

[D] They show variable oxidation state

Question No:7

Which of the following is a rare earth element?

[A] Cadmium

[B] Californium

[C] Cerium

[D] Cesium

Question No:8

Variable valency is exhibited by

[A] Normal elements

[B] Metallic elements

[C] Transitional elements

[D] Non-metallic elements

Question No:9

Which one of the following is correct about stability of the given ions

[A] Pb2+>Pb4+

[B] Pb4+>Pb2+

[C] Si2+>Si4+

[D] Sn4+> Sn2+

Question No:10

The transition element among the following is

[A] Cu

[B] Sn

[C] Pb

[D] Zn

Question No:11

Which of the following is not a periodic property

[A] Valency

[B] Specific heat

[C] lonisation portential

[D] Atomic size

Question No:12

Elements of the same vertical group of the periodic table have

[A] same atomic size

[B] same electronic configuration

[C] same number of electrons in outermost shell of their atoms

[D] same number of atoms

Question No:13

The appoximate size of an atom is

[A] 10-6m

[B] 10-8m

[C] 10-10m

[D] 10-12m

Question No:14

Atomic radius is measured by

[A] Mulliken oil drop method

[B] Rutherford’s a-ray scattering experiment

[C] X-ray diffraction technique

[D] Electric discharge tube experiment

Question No:15

Atomic radius depends upon

[A] Number of bonds formed by the atom

[B] Nature of the bonding

[C] Oxidation state of the atom

[D] All the above

Question No:16

Covalent bond length of chlorine molecule is 1.98A 0. Covalent radius of chlorine is

[A] 1.98A0

[B] 1.7A0

[C] 2.05A0

[D] 0.99A0

Question No:17

Van der waal’s radius is used for

[A] Molecular substances in gaseous state only

[B] Molecular substances in solid state only

[C] Molecular substances in liquid state only

[D] Molecular substances in any state

Question No:18

If the atomic radius of non-metal bromine is 1.14A0, its covalent radius is

[A] 1.14A0

[B] 1.12A0

[C] 1.16A0

[D] 0.57A0

Question No:19

The covalent and van der waals radii of chlorine respectively are

[A] 1.80A0 & 0.99A0

[B] 0.99A0 & 1.80A0

[C] 1.80A0 & 1.80A0

[D] 0.99A0 & 0.99A0

Question No:20

In the iso electronic species the ionic radii (A0) of N3-, O2-, F are respectively given by

[A] 1.36, 1.71, 1.40

[B] 1.36, 1.40, 1.71

[C] 1.71, 1.36, 1.40

[D] 1.71, 1.40, 1.36