Answer
Verified
394.8k+ views
Hint: Try to find the expression for calculation of electronegativity which uses bond energies. Based on the equation we can find the quantities which cannot be calculated exactly. Try to find exceptions in different types of compounds of halides.
Complete step by step answer:
A.Pauling scale of electronegativity estimates the difference between electronegativities of 2 elements. We require bond dissociation energy of compounds of both elements and bond dissociation energies of molecules of both elements.
For this calculation, we require the following condition to be true.
\[{ E }_{ A-B }>\sqrt { { E }_{ A-A }\times { E }_{ B-B } }\]
${ E }_{ A-A }$ stands for A-A bond dissociation energy.
\[\left( { { X }_{ A }-{ X }_{ B } } \right) ^{ 2 }\quad =\quad { E }_{ A-B }-\sqrt { { E }_{ A-A }\times { E }_{ B-B } } \quad =\quad \triangle \quad\]
$ { X }_{ A }$ stands for electronegativity of element A.
\[{ X }_{ A }-{ X }_{ B }\quad =\quad 0.208\sqrt { \triangle }\]
0.208 is a conversion factor.
-Pauling scale is based on bond dissociation energies so they will not be accurate. The electronegativity of an element may differ when we use different elements for calculation. This is the disadvantage of the Pauling scale.
B.Fluorine differs from other halogens in some physical and chemical properties. The bond energy of fluorine is less compared to other elements in the group deviating the original trend. Fluorine molecules have a short bond and 3 lone pairs on each fluorine atom resulting in an unstable F-F bond.
Hydrogen halides of halogens are highly acidic whereas HF is weakly acidic due to the high bond dissociation energy of HF. Fluorine forms fluorides of oxygen whereas other halogens form oxides. Silver Fluoride is soluble in water, unlike other silver halides which are insoluble in water. Other halogens exhibit more than one oxidation state whereas Fluorine exhibits only 1 oxidation state.
Note:
The first elements of s and p block elements deviate from remaining elements because of their very small size and high charge density. That’s why some fluorine properties deviate from rest and we need to be careful with them.
Complete step by step answer:
A.Pauling scale of electronegativity estimates the difference between electronegativities of 2 elements. We require bond dissociation energy of compounds of both elements and bond dissociation energies of molecules of both elements.
For this calculation, we require the following condition to be true.
\[{ E }_{ A-B }>\sqrt { { E }_{ A-A }\times { E }_{ B-B } }\]
${ E }_{ A-A }$ stands for A-A bond dissociation energy.
\[\left( { { X }_{ A }-{ X }_{ B } } \right) ^{ 2 }\quad =\quad { E }_{ A-B }-\sqrt { { E }_{ A-A }\times { E }_{ B-B } } \quad =\quad \triangle \quad\]
$ { X }_{ A }$ stands for electronegativity of element A.
\[{ X }_{ A }-{ X }_{ B }\quad =\quad 0.208\sqrt { \triangle }\]
0.208 is a conversion factor.
-Pauling scale is based on bond dissociation energies so they will not be accurate. The electronegativity of an element may differ when we use different elements for calculation. This is the disadvantage of the Pauling scale.
B.Fluorine differs from other halogens in some physical and chemical properties. The bond energy of fluorine is less compared to other elements in the group deviating the original trend. Fluorine molecules have a short bond and 3 lone pairs on each fluorine atom resulting in an unstable F-F bond.
Hydrogen halides of halogens are highly acidic whereas HF is weakly acidic due to the high bond dissociation energy of HF. Fluorine forms fluorides of oxygen whereas other halogens form oxides. Silver Fluoride is soluble in water, unlike other silver halides which are insoluble in water. Other halogens exhibit more than one oxidation state whereas Fluorine exhibits only 1 oxidation state.
Note:
The first elements of s and p block elements deviate from remaining elements because of their very small size and high charge density. That’s why some fluorine properties deviate from rest and we need to be careful with them.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
Select the word that is correctly spelled a Twelveth class 10 english CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
What is the z value for a 90 95 and 99 percent confidence class 11 maths CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What organs are located on the left side of your body class 11 biology CBSE
What is BLO What is the full form of BLO class 8 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE