Question No:1

Among chalcogens electron affinity is highest for

[A] O

[B] S

[C] Se

[D] Te

Question No:2

The element with highest electron affinity is

[A] Fluorine

[B] Cesium

[C] Helium

[D] Chlorine

Question No:3

Incorrect statement is

[A] Fluorine has the highest electron affinity

[B] Greater the nuclear charge, greater is the electron affinity

[C] The electron affinity of Nitrogen is positive (energy is absorbed)

[D] Chlorine has highest electron affinity

Question No:4

The electron affinity values of elements A, B, C and D are respectively -135, -60, -200 and -348kJ mol^–1. The outer electronic configuration of element B is

[A] I)3s²3p⁵

[B] 3s²3p⁴

[C] 3s²3p³

[D] 3s² 3p²1

Question No:5

Pauling’s Electronegativity is based on

[A] Electron affinity

[B] lonisation potential

[C] Both IP and EA

[D] Bond energies

Question No:6

Pauling’s electronegativity values for elements are useful in predicting

[A] Polarity of the molecules

[B] Position in the E.M.F. series

[C] Coordination numbers

[D] Dipole moments

Question No:7

Electronegativity of an element is the average of its ionisation energy and electron affinity according to

[A] Pauling

[B] Rutherford

[C] Bohr

[D] Mulliken

Question No:8

Correct relation among X_A, X_B and, where X_A and X_B are the electronegativities of elements A and B

[A] X_A + X_B = 0.208 √Δ

[B] √( X_A-X_B )= 0.208 x Δ

[C] X_A-X_B = 0.208 √Δ

[D] X_A-X_B= √(0.208 x& Delta;)

Question No:9

Reference element for Pauling’s electro-negativity is

[A] H

[B] C

[C] C

[D] He

Question No:10

The electronegativity values according to Mulliken scale are ……. times to those in Pauling scale

[A] 0.208

[B] 2

[C] 2.8

[D] 544

Question No:11

Electronegativity on Mulliken scale is limited to

[A] Monovalent atoms

[B] Bivalent atoms

[C] Both Monovalent and bivalent atoms

[D] All multivalent atoms

Question No:12

If I and E are ionisation energy and electron affinity of an element in kJ mole^–1 electronegativity is given as

[A] I+E/2

[B] I+E /5.6

[C] I+E/129

[D] I+E544

Question No:13

In a period electronegativity is highest for

[A] Chalcogen

[B] Halogen

[C] Inert gas

[D] Alkali metal

Question No:14

The values that are useful in writing chemical formulae and in calculation of oxidation states are

[A] Iomsation potential

[B] Electron affinity

[C] Electronegativity

[D] Metallic character

Question No:15

Elements with high Electronegativity are generally

[A] Good reductants

[B] Hard solids

[C] Good oxidants

[D] Soft solids

Question No:16

The stable oxidation state of Thallium, a IIIA group element is

[A] 1

[B] 3

[C] -3

[D] 5

Question No:17

Maximum oxidation state (+8) is exhibited by

[A] Co&Ni

[B] Ru&Os

[C] Cl&I

[D] Te & I

Question No:18

An element has nine positive charges in its nucleus. Its common oxidation state is

[A] 7

[B] 5

[C] -1

[D] 1

Question No:19

An element with electronic arrangement as 2, 8, 18, 1 will exhibit the following stable oxidation states

[A] + 2& + 4

[B] + l& + 2

[C] + 2 only

[D] + 1 only

Question No:20

Basic nature of the oxides of a period from left to right

[A] Increases

[B] Decreases

[C] Remains constant

[D] First increases and then decreases