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(i) Explain why fluorine from only one oxoacid(HOF). (ii) Why are halogens strong oxidizing agents? (iii) How is SO2 an air pollutant?

(i) Explain why fluorine from only one oxoacid(HOF).
(ii) Why are halogens strong oxidizing agents?
(iii) How is SO2 an air pollutant?

Grade:Upto college level

3 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
6 years ago
(1)In fluorine d-orbitals are absent so it shows only +1 oxidation state in oxo-acid, but not + 3, + 5 or + 7. That's why unlike other members (halogens) fluorine only forms one oxoacid HOF and not others like HOFO, HOF02 and HOF03.moreover it has small size and its electronegativity is high

(2)because of their high electronegativty

(3)so2 as a pollutant
Sulfur dioxide (SO2) results from the combustion of fuels containing sulfur or sulfurous chemicals, the combustion of H2S in flares, paper production, and the smelting of ores containing sulfides. SO2 exhausted to the atmosphere may cause respiratory problems in sensitive individuals such as asthmatics. It can also cause damage to plants and trees, such as the reddening of pine needles. It can hasten the corrosion of iron and other metals. If the SO2 combines with water vapour, it can cause acid precipitation which can erode metal and limestone, impact the ionic balance of clay soils, fade paints and change the pH of river and lake water to the detriment of fish and other aquatic organisms. In all of these cased the impact of atmospheric SO2 is to combine with water in plant ot animal cells, atmospheric water, or standing water to make sulfurous acid (H2SO3). If the SO2 oxidizes in the atmosphere to sulfur trioxide (SO3) it can combine with water to form sulfuric acid (H2SO4) with stronger environmental chemical reactions.
Vishal Khurana
27 Points
4 years ago
It forms only one *oxacid* i.e. HOF due its small size and highest electronegativity.
And the most imporatnt due to non availability of d orbital.
Rishi Sharma
askIITians Faculty 646 Points
8 months ago
Dear Student,
Please find below the solution to your problem.

(1)In fluorine d-orbitals are absent so it shows only +1 oxidation state in oxo-acid, but not + 3, + 5 or + 7. That's why unlike other members (halogens) fluorine only forms one oxoacid HOF and not others like HOFO, HOF02 and HOF03.moreover it has small size and its electronegativity is high
(2)because of their high electronegativty
(3)so2 as a pollutant Sulfur dioxide (SO2) results from the combustion of fuels containing sulfur or sulfurous chemicals, the combustion of H2S in flares, paper production, and the smelting of ores containing sulfides. SO2 exhausted to the atmosphere may cause respiratory problems in sensitive individuals such as asthmatics. It can also cause damage to plants and trees, such as the reddening of pine needles. It can hasten the corrosion of iron and other metals. If the SO2 combines with water vapour, it can cause acid precipitation which can erode metal and limestone, impact the ionic balance of clay soils, fade paints and change the pH of river and lake water to the detriment of fish and other aquatic organisms. In all of these cased the impact of atmospheric SO2 is to combine with water in plant ot animal cells, atmospheric water, or standing water to make sulfurous acid (H2SO3). If the SO2 oxidizes in the atmosphere to sulfur trioxide (SO3) it can combine with water to form sulfuric acid (H2SO4) with stronger environmental chemical reactions.

Thanks and Regards

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