Electronegativity and its Applications

IMPORTANT

Electronegativity and its Applications: Overview

This topic covers concepts such as Applications of Electronegativity, Pauling's Scale of Electronegativity, Effect of Electronegativity on Acidic Strength, and Effect of Electronegativity on Basic Strength of Compounds.

Important Questions on Electronegativity and its Applications

MEDIUM
IMPORTANT

The formation of the oxide ion,   O 2 (g)  requires first an exothermic and then an endothermic step as shown below :

  O(g)+ e O (g);ΔH°=142kJmo l 1

  O (g)+ e O 2 (g);ΔH°=844kJmo l 1

This is because

 

EASY
IMPORTANT

Electron gain enthalpy is the tendency of an isolated gaseous atom while electronegativity is the tendency to attract the shared pair of electrons in covalent bond.

EASY
IMPORTANT

Electron gain enthalpy is the tendency of an isolated species to accept an additional electron to form a _____ while electronegativity is defined as the tendency of the atom to attract a shared pair of electrons towards it in a covalent bond.

EASY
IMPORTANT

Electron gain enthalpy is the tendency of an isolated gaseous atom while electronegativity is the tendency to attract the shared pair of electrons in _____.

EASY
IMPORTANT

Differentiate electronegativity and electron gain enthalpy.

MEDIUM
IMPORTANT

The highly metallic element will have the configuration of

EASY
IMPORTANT

Compare the stability of the following carbanions:

i. OH-  ii.SH-         iii.  Cl-

HARD
IMPORTANT

Which among the following statements is correct?

MEDIUM
IMPORTANT

Which of the following order represent the order for the strength of base?

EASY
IMPORTANT

Among the following compounds, the strongest acid is -

MEDIUM
IMPORTANT

Which of the following arrangement gives the correct order of increasing basicity?

HARD
IMPORTANT

Identify the correct decreasing order of acid strength for the following compounds:

(I)HClO,(II)HBrO,(III)HIO

HARD
IMPORTANT

If bond length of F2= 1.44 Å, bond length of H2=0.74 Å, En of H=2.1, En of F=4, then find out H-F bond length -

MEDIUM
IMPORTANT

Calculate the electronegativity of fluorine using the following data.
EH-H=104.2 kcal mol-1,
EF-F=36.6 kcal mol-1,
EH-F=134.6 kcal mol-1
and the electronegativity of H=2.1.

EASY
IMPORTANT

Which of the following statements is true for ethane, ethene and acetylene?

HARD
IMPORTANT

Which of the following statements (s) is (are) not true?

MEDIUM
IMPORTANT

The values of electronegativity of atom A and B are 1.20 and 4.0 respectively. The percentage of ionic character of A-B bond is

EASY
IMPORTANT

The correct order of increasing oxidising power is

MEDIUM
IMPORTANT

The values of electronegativity of atoms A and B are 1.20 and 4.0, respectively. The percentage of ionic character of A-B bond is